/* =============================================
   SketchForge Global Styles - Cyber Neon Theme
   ============================================= */

:root {
    --primary: #00e5ff;
    --primary-dark: #00b8d4;
    --primary-light: #7af3ff;
    --secondary: #7b61ff;
    --accent: #ff2bd6;
    --accent-soft: rgba(255, 43, 214, 0.35);

    --dark: #05060f;
    --darker: #03040a;
    --light: #eaf6ff;
    --bg: #070a16;
    --card-bg: rgba(13, 19, 38, 0.72);
    --card-solid: #0c1226;

    --text: #b9c6e6;
    --text-bright: #eaf6ff;
    --text-muted: #7f8db3;

    --navbar-bg: rgba(5, 8, 20, 0.72);
    --border: rgba(0, 229, 255, 0.14);
    --border-light: rgba(0, 229, 255, 0.32);
    --shadow: rgba(0, 0, 0, 0.55);
    --glow: rgba(0, 229, 255, 0.35);
    --glow-violet: rgba(123, 97, 255, 0.35);

    --hero-bg: linear-gradient(135deg, #04060f 0%, #08122a 45%, #0a0a22 100%);
    --footer-bg: rgba(4, 6, 15, 0.85);

    --font-display: 'Orbitron', 'Segoe UI', sans-serif;
    --font-ui: 'Rajdhani', 'Segoe UI', sans-serif;
}

[data-theme="dark"] {
    --bg: #070a16;
    --card-bg: rgba(13, 19, 38, 0.72);
    --card-solid: #0c1226;
    --text: #b9c6e6;
    --text-bright: #eaf6ff;
    --text-muted: #7f8db3;
    --navbar-bg: rgba(5, 8, 20, 0.72);
    --border: rgba(0, 229, 255, 0.14);
    --border-light: rgba(0, 229, 255, 0.32);
    --shadow: rgba(0, 0, 0, 0.65);
    --hero-bg: linear-gradient(135deg, #04060f 0%, #08122a 45%, #0a0a22 100%);
    --footer-bg: rgba(4, 6, 15, 0.85);
}

[data-theme="light"] {
    --bg: #eef3fb;
    --card-bg: rgba(255, 255, 255, 0.78);
    --card-solid: #ffffff;
    --text: #34405c;
    --text-bright: #0b1226;
    --text-muted: #66738f;
    --navbar-bg: rgba(255, 255, 255, 0.72);
    --border: rgba(0, 130, 160, 0.18);
    --border-light: rgba(0, 130, 160, 0.35);
    --shadow: rgba(31, 55, 90, 0.18);
    --glow: rgba(0, 160, 190, 0.28);
    --hero-bg: linear-gradient(135deg, #e8f2ff 0%, #dcecff 45%, #efe7ff 100%);
    --footer-bg: rgba(255, 255, 255, 0.8);
}

[data-theme="light"] body {
    background-image:
        radial-gradient(1100px 620px at 12% -8%, rgba(0, 160, 190, 0.12), transparent 62%),
        radial-gradient(1000px 640px at 88% -4%, rgba(123, 97, 255, 0.12), transparent 62%),
        radial-gradient(900px 560px at 50% 110%, rgba(255, 43, 214, 0.06), transparent 62%);
}

[data-theme="light"] body::before {
    opacity: 0.55;
}

[data-theme="light"] .hero-section h1 {
    background: linear-gradient(100deg, #0b1226 0%, #007a99 45%, #6a4dff 75%, #c41fa8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: #eaf6ff;
}

/* ===== BASE ===== */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    background-image:
        radial-gradient(1100px 620px at 12% -8%, rgba(0, 229, 255, 0.12), transparent 62%),
        radial-gradient(1000px 640px at 88% -4%, rgba(123, 97, 255, 0.16), transparent 62%),
        radial-gradient(900px 560px at 50% 110%, rgba(255, 43, 214, 0.09), transparent 62%);
    background-attachment: fixed;
    font-family: var(--font-ui);
    font-size: 1.02rem;
    padding-top: 56px;
    color: var(--text);
    transition:
        background-color 480ms cubic-bezier(0.4, 0, 0.2, 1),
        color 480ms cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.045) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 85%);
    mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 85%);
}

body::after {
    content: '';
    position: fixed;
    inset: -20%;
    z-index: 0;
    pointer-events: none;
    background:
        conic-gradient(from 0deg at 70% 30%, transparent 0deg, rgba(0, 229, 255, 0.05) 60deg, transparent 120deg, rgba(123, 97, 255, 0.06) 220deg, transparent 300deg);
    animation: auroraSpin 40s linear infinite;
    opacity: 0.8;
}

main {
    position: relative;
    z-index: 1;
}

h1, h2, h3, h4, h5, h6, .display-3, .display-4 {
    font-family: var(--font-display);
    letter-spacing: 0.02em;
}

a {
    color: var(--primary);
    transition: color 0.2s, text-shadow 0.2s;
}

a:hover {
    color: var(--primary-light);
    text-shadow: 0 0 14px var(--glow);
}

::selection {
    background: rgba(0, 229, 255, 0.28);
    color: #fff;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #05070f;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 10px;
    border: 2px solid #05070f;
}

@keyframes auroraSpin {
    to { transform: rotate(360deg); }
}

/* ===== NAVBAR ===== */
.navbar {
    background: var(--navbar-bg) !important;
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 0 rgba(0, 229, 255, 0.08), 0 10px 30px rgba(0, 0, 0, 0.35);
    padding: 0;
}

.navbar::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
    opacity: 0.55;
}

.navbar-brand {
    font-family: var(--font-display);
    font-size: 1.05rem;
    letter-spacing: 0.08em;
    padding: 8px 16px;
    font-weight: 700;
    text-transform: uppercase;
}

.navbar-brand i {
    font-size: 1.3rem;
    color: var(--primary) !important;
    filter: drop-shadow(0 0 8px var(--glow));
}

.navbar-brand span span,
.navbar-brand .brand-gradient {
    background: linear-gradient(100deg, var(--primary), var(--secondary) 55%, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    padding: 8px 14px !important;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--text) !important;
    transition: background 0.18s, color 0.18s, box-shadow 0.18s;
    border-radius: 8px;
    margin: 0 2px;
    position: relative;
}

.nav-link:hover {
    background: rgba(0, 229, 255, 0.08);
    color: var(--text-bright) !important;
    box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.22);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.theme-toggle {
    background: rgba(0, 229, 255, 0.06);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.theme-toggle:hover {
    background: rgba(0, 229, 255, 0.14);
    color: #fff;
    border-color: var(--border-light);
    box-shadow: 0 0 18px var(--glow);
}

.lang-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    height: 34px;
    padding: 0 9px;
    background: rgba(0, 229, 255, 0.06);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--primary);
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    cursor: pointer;
    outline: none;
    transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.lang-btn:hover,
.lang-btn:focus,
.lang-btn:focus-visible,
.lang-switch.show .lang-btn {
    background: rgba(0, 229, 255, 0.14);
    border-color: var(--border-light);
    box-shadow: 0 0 18px var(--glow);
    outline: none;
}

.lang-btn .bi-chevron-down {
    font-size: 0.62rem;
    opacity: 0.7;
}

.lang-btn .fi,
.lang-option .fi {
    width: 1.35em;
    line-height: 1em;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.lang-menu {
    min-width: 160px;
    margin-top: 8px;
    padding: 6px;
    background: var(--card-solid);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(0, 229, 255, 0.08);
}

.lang-menu .dropdown-item {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 10px;
    border-radius: 7px;
    color: var(--text-bright);
    font-size: 0.88rem;
}

.lang-menu .dropdown-item:hover,
.lang-menu .dropdown-item:focus {
    background: rgba(0, 229, 255, 0.1);
    color: var(--primary);
}

.lang-menu .dropdown-item.active {
    background: rgba(0, 229, 255, 0.14);
    color: var(--primary);
}

[data-theme="light"] .theme-toggle {
    background: rgba(0, 130, 160, 0.06);
    color: #007d99;
}

[data-theme="light"] .theme-toggle:hover {
    background: rgba(0, 130, 160, 0.14);
    color: #005f75;
    border-color: var(--border-light);
    box-shadow: 0 0 18px var(--glow);
}

[data-theme="light"] .lang-btn {
    background: rgba(0, 130, 160, 0.06);
    border-color: var(--border);
    color: #007d99;
}

[data-theme="light"] .lang-btn:hover,
[data-theme="light"] .lang-btn:focus,
[data-theme="light"] .lang-btn:focus-visible,
[data-theme="light"] .lang-switch.show .lang-btn {
    background: rgba(0, 130, 160, 0.14);
    border-color: var(--border-light);
    color: #005f75;
    box-shadow: 0 0 18px var(--glow);
}

[data-theme="light"] .lang-menu {
    box-shadow: 0 14px 40px rgba(31, 55, 90, 0.18), 0 0 24px rgba(0, 160, 190, 0.12);
}

[data-theme="light"] .lang-menu .dropdown-item:hover,
[data-theme="light"] .lang-menu .dropdown-item:focus,
[data-theme="light"] .lang-menu .dropdown-item.active {
    background: rgba(0, 130, 160, 0.12);
    color: #007d99;
}

[data-theme="light"] .lang-btn .fi,
[data-theme="light"] .lang-option .fi {
    box-shadow: 0 0 0 1px rgba(11, 18, 38, 0.15);
}

/* ===== HERO ===== */
.hero-section {
    background: var(--hero-bg);
    color: white;
    padding: 110px 0 80px;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 18% 40%, rgba(0, 229, 255, 0.22) 0%, transparent 48%),
        radial-gradient(circle at 82% 35%, rgba(123, 97, 255, 0.22) 0%, transparent 48%),
        radial-gradient(circle at 50% 105%, rgba(255, 43, 214, 0.16) 0%, transparent 55%);
}

.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.07) 1px, transparent 1px);
    background-size: 60px 60px;
    transform: perspective(600px) rotateX(58deg) scale(1.7);
    transform-origin: bottom center;
    opacity: 0.5;
    -webkit-mask-image: linear-gradient(to top, #000, transparent 70%);
    mask-image: linear-gradient(to top, #000, transparent 70%);
}

.hero-section h1 {
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: linear-gradient(100deg, #ffffff 0%, var(--primary) 45%, var(--secondary) 75%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 28px rgba(0, 229, 255, 0.35));
    animation: heroGlow 6s ease-in-out infinite alternate;
}

.hero-section h1 span {
    -webkit-text-fill-color: transparent;
}

.hero-section .lead {
    font-weight: 400;
    opacity: 0.85;
    max-width: 620px;
    margin: 0 auto;
    font-size: 1.12rem;
    letter-spacing: 0.02em;
}

@keyframes heroGlow {
    from { filter: drop-shadow(0 0 18px rgba(0, 229, 255, 0.25)); }
    to { filter: drop-shadow(0 0 34px rgba(123, 97, 255, 0.45)); }
}

/* ===== CARDS ===== */
.card {
    border-radius: 14px;
    overflow: hidden;
    background: var(--card-bg);
    border: 1px solid var(--border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.card h4, .card h5, .card h6 {
    color: var(--text-bright);
}

/* Feature Cards */
.feature-btn {
    position: relative;
    background: var(--card-bg);
    border-radius: 14px;
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: all 0.28s ease;
    border: 1px solid var(--border);
    overflow: hidden;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.feature-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
    box-shadow: 0 0 14px var(--glow);
}

.feature-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.12), transparent 65%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.feature-btn:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.45), 0 0 26px rgba(0, 229, 255, 0.12);
    border-color: var(--border-light);
}

.feature-btn:hover::before {
    transform: scaleX(1);
}

.feature-btn:hover::after {
    opacity: 1;
}

.feature-btn:active {
    transform: scale(0.98) translateY(-2px);
    transition-duration: 0.1s;
}

.feature-icon {
    font-size: 2.2rem;
    display: block;
    margin-bottom: 0.8rem;
    transition: transform 0.3s ease, filter 0.3s ease;
    filter: drop-shadow(0 0 10px currentColor);
}

.feature-btn:hover .feature-icon {
    transform: scale(1.12);
    filter: drop-shadow(0 0 18px currentColor);
}

.feature-btn h4 {
    font-weight: 700;
    margin-bottom: 0.4rem;
    font-size: 1.02rem;
    color: var(--text-bright);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.feature-btn:hover h4 {
    color: var(--primary);
    text-shadow: 0 0 16px var(--glow);
}

.feature-btn p {
    margin-bottom: 0;
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--text-muted);
}

/* Drawing Cards */
.drawing-card {
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
    border: 1px solid var(--border);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
}

.drawing-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    box-shadow: inset 0 0 0 1px transparent;
    transition: box-shadow 0.25s;
}

.drawing-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 26px rgba(0, 229, 255, 0.14);
    border-color: var(--border-light);
}

.drawing-card:hover::after {
    box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.25);
}

.drawing-thumb {
    height: 160px;
    width: 100%;
    object-fit: cover;
    background: #05070f;
}

.drawing-delete-form {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 3;
    margin: 0;
}

.drawing-delete-btn {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(5, 8, 20, 0.62);
    border: 1px solid rgba(255, 67, 100, 0.4);
    color: #ff6b86;
    font-size: 0.9rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.drawing-delete-btn:hover,
.drawing-delete-btn:focus-visible {
    background: #ff4364;
    border-color: #ff4364;
    color: #fff;
    box-shadow: 0 0 16px rgba(255, 67, 100, 0.45);
    transform: translateY(-1px);
    outline: none;
}

[data-theme="light"] .drawing-delete-btn {
    background: rgba(255, 255, 255, 0.88);
    border-color: rgba(209, 42, 74, 0.3);
    color: #d12a4a;
}

[data-theme="light"] .drawing-delete-btn:hover,
[data-theme="light"] .drawing-delete-btn:focus-visible {
    background: #d12a4a;
    border-color: #d12a4a;
    color: #fff;
    box-shadow: 0 0 16px rgba(209, 42, 74, 0.35);
}

/* ===== DELETE MODAL & DESTRUCTION FX ===== */
body.delete-modal-open {
    overflow: hidden;
}

body.delete-modal-open main {
    z-index: 1040;
}

.delete-overlay {
    position: fixed;
    inset: 0;
    z-index: 1900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(3, 4, 10, 0.74);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    transition: opacity 0.24s ease;
}

.delete-overlay[hidden] {
    display: none;
}

.delete-overlay.show {
    opacity: 1;
}

.delete-dialog {
    position: relative;
    width: min(430px, 100%);
    padding: 30px 26px 24px;
    background: var(--card-solid);
    border: 1px solid rgba(255, 67, 100, 0.35);
    border-radius: 16px;
    text-align: center;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 44px rgba(255, 67, 100, 0.16);
    transform: translateY(16px) scale(0.95);
    transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.delete-overlay.show .delete-dialog {
    transform: translateY(0) scale(1);
}

.delete-dialog::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 50% -20%, rgba(255, 67, 100, 0.16), transparent 60%),
        repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 4px);
}

.delete-icon {
    position: relative;
    width: 66px;
    height: 66px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 67, 100, 0.12);
    border: 1px solid rgba(255, 67, 100, 0.45);
    color: #ff5e7a;
    font-size: 1.7rem;
    box-shadow: 0 0 26px rgba(255, 67, 100, 0.3);
    animation: deleteIconPulse 1.8s ease-in-out infinite;
}

@keyframes deleteIconPulse {
    0%, 100% { box-shadow: 0 0 22px rgba(255, 67, 100, 0.25); }
    50% { box-shadow: 0 0 40px rgba(255, 67, 100, 0.5); }
}

.delete-dialog h3 {
    position: relative;
    margin: 0 0 10px;
    color: var(--text-bright);
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.delete-dialog p {
    position: relative;
    margin: 0;
    color: var(--text-muted);
    font-size: 0.94rem;
    line-height: 1.5;
}

.delete-dialog .delete-warning {
    color: #ff8a9c;
    font-weight: 600;
    margin-bottom: 4px;
}

.delete-dialog .delete-target {
    margin-top: 8px;
    color: var(--text-bright);
    font-weight: 700;
    font-size: 0.9rem;
    overflow-wrap: anywhere;
}

[data-theme="light"] .delete-dialog .delete-warning {
    color: #c22645;
}

.delete-actions {
    position: relative;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}

.delete-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    font-family: var(--font-ui);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.delete-cancel:hover,
.delete-cancel:focus-visible {
    background: rgba(0, 229, 255, 0.08);
    border-color: var(--border-light);
    color: var(--text-bright);
    outline: none;
}

.delete-confirm {
    border-color: rgba(255, 67, 100, 0.55);
    background: linear-gradient(135deg, #ff4364, #ff8a2b);
    color: #fff;
    box-shadow: 0 0 20px rgba(255, 67, 100, 0.25);
}

.delete-confirm:hover,
.delete-confirm:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 0 32px rgba(255, 67, 100, 0.55);
    outline: none;
}

[data-theme="light"] .delete-cancel:hover,
[data-theme="light"] .delete-cancel:focus-visible {
    background: rgba(0, 130, 160, 0.1);
}

.explosion-layer {
    position: fixed;
    inset: 0;
    z-index: 2000;
    pointer-events: none;
    overflow: hidden;
}

.explosion-particle {
    position: fixed;
    left: var(--x);
    top: var(--y);
    width: var(--size);
    height: var(--size);
    background: var(--color);
    border-radius: 2px;
    box-shadow: 0 0 10px var(--color);
    animation: sfParticleBurst 720ms cubic-bezier(0.15, 0.65, 0.3, 1) forwards;
}

@keyframes sfParticleBurst {
    0% {
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
        opacity: 1;
    }
    70% { opacity: 1; }
    100% {
        transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) rotate(var(--rot)) scale(0.15);
        opacity: 0;
    }
}

.explosion-flash {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(circle at var(--fx) var(--fy),
        rgba(255, 255, 255, 0.85),
        rgba(255, 170, 60, 0.35) 18%,
        transparent 55%);
    animation: sfExplosionFlash 520ms ease-out forwards;
}

@keyframes sfExplosionFlash {
    0% { opacity: 0; }
    12% { opacity: 1; }
    100% { opacity: 0; }
}

.drawing-card.is-destroying {
    animation: sfCardDestroy 760ms cubic-bezier(0.36, 0.07, 0.19, 0.97) forwards;
    transform-origin: var(--origin-x, 50%) var(--origin-y, 50%);
    pointer-events: none;
    z-index: 5;
}

@keyframes sfCardDestroy {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }
    12% {
        transform: translateX(-6px) rotate(-1.5deg) scale(1.03);
        filter: brightness(1.7) saturate(1.4);
    }
    24% { transform: translateX(6px) rotate(1.5deg); }
    36% { transform: translateX(-4px) rotate(-1deg); }
    50% {
        transform: scale(1.06);
        filter: brightness(2.4) saturate(1.8);
        box-shadow: 0 0 60px rgba(255, 150, 60, 0.75);
    }
    100% {
        transform: scale(0.15) rotate(10deg);
        opacity: 0;
        filter: brightness(3);
    }
}

@media (prefers-reduced-motion: reduce) {
    .delete-overlay,
    .delete-dialog,
    .delete-icon {
        transition: none;
        animation: none;
    }
}

.press-card {
    transition: transform 0.15s;
}

.press-card:active {
    transform: scale(0.97);
}

/* ===== BUTTONS ===== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: transparent;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #04101a;
    box-shadow: 0 6px 22px rgba(0, 229, 255, 0.28);
    transition: all 0.22s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    border-color: transparent;
    color: #04101a;
    box-shadow: 0 8px 30px rgba(0, 229, 255, 0.45), 0 0 20px rgba(123, 97, 255, 0.35);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #00e5a0, #00b8d4);
    border-color: transparent;
    color: #04101a;
    font-weight: 700;
    box-shadow: 0 6px 22px rgba(0, 229, 160, 0.25);
}

.btn-success:hover {
    box-shadow: 0 8px 30px rgba(0, 229, 160, 0.45);
    transform: translateY(-1px);
}

.btn-outline-light {
    border-color: var(--border-light);
    color: var(--text-bright);
}

.btn-outline-light:hover {
    background: rgba(0, 229, 255, 0.1);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 0 18px var(--glow);
}

/* Futuristic CTA */
.sf-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 10px;
    border: 1px solid var(--border-light);
    background: rgba(0, 229, 255, 0.06);
    color: var(--text-bright);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-decoration: none;
    overflow: hidden;
    transition: all 0.25s ease;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.sf-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -120%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    transition: left 0.6s ease;
}

.sf-btn:hover {
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 26px var(--glow), inset 0 0 22px rgba(0, 229, 255, 0.08);
    text-shadow: 0 0 12px var(--glow);
}

.sf-btn:hover::before {
    left: 140%;
}

.sf-btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: transparent;
    color: #04101a;
    box-shadow: 0 8px 26px rgba(0, 229, 255, 0.3);
}

.sf-btn-primary:hover {
    color: #04101a;
    box-shadow: 0 10px 34px rgba(0, 229, 255, 0.45), 0 0 22px rgba(123, 97, 255, 0.4);
    text-shadow: none;
}

.sf-btn-ghost {
    background: rgba(255, 255, 255, 0.03);
}

/* ===== FORMS ===== */
.form-control, .form-select {
    background: rgba(6, 10, 24, 0.6);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 10px;
    padding: 10px 12px;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.form-control:focus, .form-select:focus {
    background: rgba(6, 10, 24, 0.85);
    color: var(--text-bright);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.14), 0 0 20px rgba(0, 229, 255, 0.12);
}

.form-control::placeholder {
    color: rgba(185, 198, 230, 0.4);
}

.form-label, label {
    color: var(--text);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.form-check-input {
    background-color: rgba(6, 10, 24, 0.6);
    border-color: var(--border-light);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--glow);
}

/* ===== DROPDOWNS ===== */
.dropdown-menu {
    background: rgba(8, 12, 28, 0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.55), 0 0 20px rgba(0, 229, 255, 0.08);
    padding: 6px;
}

.dropdown-item {
    color: var(--text);
    padding: 8px 14px;
    font-size: 0.92rem;
    border-radius: 8px;
    transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background: rgba(0, 229, 255, 0.12);
    color: var(--text-bright);
    box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.2);
}

[data-theme="light"] .dropdown-menu {
    background: var(--card-solid);
    box-shadow: 0 14px 40px rgba(31, 55, 90, 0.18), 0 0 20px rgba(0, 160, 190, 0.1);
}

[data-theme="light"] .dropdown-item:hover,
[data-theme="light"] .dropdown-item:focus {
    background: rgba(0, 130, 160, 0.12);
    color: #007d99;
    box-shadow: inset 0 0 0 1px rgba(0, 130, 160, 0.2);
}

.dropdown-divider {
    border-color: var(--border);
}

/* ===== FOOTER ===== */
footer {
    background: var(--footer-bg) !important;
    border-top: 1px solid var(--border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
    z-index: 1;
}

footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
    opacity: 0.5;
}

/* ===== SECTION ===== */
.features-section {
    padding: 70px 0;
}

.features-section h2 {
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--text-bright);
    text-transform: uppercase;
}

.sf-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary);
    background: rgba(0, 229, 255, 0.07);
    border: 1px solid var(--border);
    box-shadow: inset 0 0 16px rgba(0, 229, 255, 0.06), 0 0 18px rgba(0, 229, 255, 0.08);
}

.sf-eyebrow i {
    filter: drop-shadow(0 0 8px var(--glow));
}

.sf-panel {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    position: relative;
    overflow: hidden;
}

.sf-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.6;
}

.sf-kbd {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 6px;
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid var(--border);
    color: var(--primary);
    font-family: var(--font-display);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.3);
}

/* ===== DARK MODE ===== */
[data-theme="dark"] .display-3,
[data-theme="dark"] .display-4 {
    text-shadow: 0 0 34px rgba(0, 229, 255, 0.18);
}

[data-theme="dark"] .card {
    border-color: var(--border);
}

[data-theme="dark"] .card.shadow-lg {
    box-shadow: 0 1.4rem 3.4rem rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 229, 255, 0.06) !important;
    border: 1px solid var(--border);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background: rgba(6, 10, 24, 0.6);
    border: 1px solid var(--border);
    color: var(--text-bright);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background: rgba(6, 10, 24, 0.85);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.14), 0 0 20px rgba(0, 229, 255, 0.12);
}

[data-theme="dark"] .form-label,
[data-theme="dark"] label {
    color: var(--text-bright);
}

[data-theme="dark"] .card .form-control::placeholder {
    color: rgba(185, 198, 230, 0.35);
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] a.text-primary {
    color: var(--primary) !important;
}

[data-theme="dark"] .card form .btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    box-shadow: 0 6px 22px rgba(0, 229, 255, 0.3);
}

[data-theme="dark"] .card form .btn-primary:hover {
    box-shadow: 0 8px 32px rgba(0, 229, 255, 0.5), 0 0 20px rgba(123, 97, 255, 0.35);
    transform: translateY(-1px);
}

/* ===== ALERTS ===== */
.alert {
    border-radius: 12px;
    font-size: 0.92rem;
}

.sf-alert {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    padding: 14px 44px 14px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(8, 12, 28, 0.82);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-bright);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    animation: sfAlertIn 0.45s cubic-bezier(0.2, 0.9, 0.3, 1.2) both;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.sf-alert::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--alert-color, var(--primary));
    box-shadow: 0 0 18px var(--alert-color, var(--primary));
}

.sf-alert::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(420px 80px at 0% 50%, var(--alert-tint, rgba(0, 229, 255, 0.12)), transparent 70%);
    opacity: 0.9;
}

.sf-alert > * {
    position: relative;
    z-index: 1;
}

.sf-alert-icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 9px;
    color: var(--alert-color, var(--primary));
    background: var(--alert-tint, rgba(0, 229, 255, 0.12));
    border: 1px solid var(--alert-tint, rgba(0, 229, 255, 0.2));
    box-shadow: 0 0 16px var(--alert-tint, rgba(0, 229, 255, 0.12));
    font-size: 1rem;
}

.sf-alert-content {
    flex: 1;
    min-width: 0;
    line-height: 1.45;
}

.sf-alert-title {
    display: block;
    font-family: var(--font-display);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--alert-color, var(--primary));
    margin-bottom: 2px;
}

.sf-alert-text {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-bright);
    word-break: break-word;
}

.sf-alert-close {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 2;
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 7px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.sf-alert-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-light);
    box-shadow: 0 0 14px var(--alert-tint, rgba(0, 229, 255, 0.15));
}

.sf-alert-progress {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 2px;
    width: 100%;
    z-index: 2;
    background: linear-gradient(90deg, var(--alert-color, var(--primary)), transparent);
    transform-origin: left;
    animation: sfAlertProgress 9s linear forwards;
    opacity: 0.7;
}

.sf-alert-success {
    --alert-color: #00e5a0;
    --alert-tint: rgba(0, 229, 160, 0.14);
}

.sf-alert-error,
.sf-alert-danger {
    --alert-color: #ff4d6d;
    --alert-tint: rgba(255, 77, 109, 0.14);
}

.sf-alert-warning {
    --alert-color: #ffb020;
    --alert-tint: rgba(255, 176, 32, 0.14);
}

.sf-alert-info,
.sf-alert-debug {
    --alert-color: var(--primary);
    --alert-tint: rgba(0, 229, 255, 0.14);
}

@keyframes sfAlertIn {
    from {
        opacity: 0;
        transform: translateX(-18px) scale(0.98);
        filter: blur(4px);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
        filter: blur(0);
    }
}

@keyframes sfAlertProgress {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}

/* Bootstrap alert fallback (AI panel) */
.alert-warning,
.alert-danger,
.alert-success,
.alert-info {
    background: rgba(8, 12, 28, 0.85) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-bright) !important;
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
}

/* ===== MISC FUTURISTIC HELPERS ===== */
.sf-scanline {
    position: relative;
}

.sf-scanline::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 229, 255, 0.035) 0px,
        rgba(0, 229, 255, 0.035) 1px,
        transparent 1px,
        transparent 4px
    );
    opacity: 0.5;
}

.sf-corner {
    position: relative;
}

.sf-corner::before,
.sf-corner::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-color: var(--primary);
    border-style: solid;
    opacity: 0.65;
    pointer-events: none;
    transition: opacity 0.25s;
}

.sf-corner::before {
    top: 8px;
    left: 8px;
    border-width: 1px 0 0 1px;
}

.sf-corner::after {
    bottom: 8px;
    right: 8px;
    border-width: 0 1px 1px 0;
}

.sf-corner:hover::before,
.sf-corner:hover::after {
    opacity: 1;
}

.sf-gradient-text {
    background: linear-gradient(100deg, var(--primary), var(--secondary) 55%, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero-section {
        padding: 80px 0 55px;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .features-section {
        padding: 45px 0;
    }

    .sf-alert {
        padding: 12px 40px 12px 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    body::after,
    .hero-section h1,
    .sf-alert,
    .sf-alert-progress {
        animation: none !important;
    }

    * {
        scroll-behavior: auto !important;
    }
}

/* =============================================
   ULTRA FUTURISTIC LAYER
   ============================================= */

/* --- Particle field + cursor spotlight --- */
.sf-particles {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.75;
}

.sf-cursor-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(0, 229, 255, 0.10), rgba(123, 97, 255, 0.06) 42%, transparent 70%);
    mix-blend-mode: screen;
    transition: opacity 0.4s ease;
    will-change: left, top;
}

body.sf-pointer-active .sf-cursor-glow {
    opacity: 1;
}

/* --- Energy borders on cards --- */
.card,
.sf-panel {
    border: 1px solid transparent;
    background:
        linear-gradient(rgba(9, 13, 28, 0.92), rgba(9, 13, 28, 0.92)) padding-box,
        linear-gradient(120deg,
            rgba(0, 229, 255, 0.65),
            rgba(123, 97, 255, 0.35) 25%,
            rgba(255, 43, 214, 0.55) 50%,
            rgba(0, 229, 255, 0.25) 75%,
            rgba(0, 229, 255, 0.65)) border-box;
    background-size: 100% 100%, 300% 300%;
    animation: sfBorderFlow 9s linear infinite;
}

[data-theme="light"] .card,
[data-theme="light"] .sf-panel {
    background:
        linear-gradient(rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.94)) padding-box,
        linear-gradient(120deg,
            rgba(0, 160, 190, 0.55),
            rgba(123, 97, 255, 0.3) 25%,
            rgba(196, 31, 168, 0.4) 50%,
            rgba(0, 160, 190, 0.2) 75%,
            rgba(0, 160, 190, 0.55)) border-box;
}

@keyframes sfBorderFlow {
    0% { background-position: 0 0, 0% 50%; }
    100% { background-position: 0 0, 300% 50%; }
}

/* --- Hero FX --- */
.hero-section h1 {
    position: relative;
    display: inline-block;
}

.hero-section h1::before,
.hero-section h1::after {
    content: attr(data-text);
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
    -webkit-background-clip: initial;
    background: none;
    -webkit-text-fill-color: currentColor;
    mix-blend-mode: screen;
}

.hero-section h1::before {
    color: var(--primary);
    animation: sfGlitchCyan 7s steps(1) infinite;
}

.hero-section h1::after {
    color: var(--accent);
    animation: sfGlitchMagenta 7s steps(1) infinite;
}

@keyframes sfGlitchCyan {
    0%, 86%, 100% { opacity: 0; transform: translate(0, 0); clip-path: inset(0 0 100% 0); }
    87% { opacity: 0.8; transform: translate(-3px, -2px); clip-path: inset(10% 0 55% 0); }
    89% { opacity: 0.6; transform: translate(2px, 1px); clip-path: inset(45% 0 20% 0); }
    91% { opacity: 0; }
}

@keyframes sfGlitchMagenta {
    0%, 88%, 100% { opacity: 0; transform: translate(0, 0); clip-path: inset(0 0 100% 0); }
    89% { opacity: 0.7; transform: translate(3px, 2px); clip-path: inset(60% 0 10% 0); }
    92% { opacity: 0.5; transform: translate(-2px, -1px); clip-path: inset(20% 0 60% 0); }
    94% { opacity: 0; }
}

.sf-hero-fx {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.sf-ring {
    position: absolute;
    left: 50%;
    top: 52%;
    width: 540px;
    height: 540px;
    margin: -270px 0 0 -270px;
    border-radius: 50%;
    border: 1px solid rgba(0, 229, 255, 0.16);
    box-shadow: inset 0 0 60px rgba(0, 229, 255, 0.06);
}

.sf-ring::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: rgba(0, 229, 255, 0.8);
    border-right-color: rgba(123, 97, 255, 0.55);
    filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.45));
    animation: sfSpin 16s linear infinite;
}

.sf-ring::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    margin: -3px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 14px var(--primary), 0 0 30px var(--primary);
}

.sf-ring.r2 {
    width: 760px;
    height: 760px;
    margin: -380px 0 0 -380px;
    border-color: rgba(123, 97, 255, 0.14);
    opacity: 0.75;
}

.sf-ring.r2::before {
    animation: sfSpinRev 26s linear infinite;
    border-top-color: rgba(255, 43, 214, 0.6);
    border-right-color: rgba(0, 229, 255, 0.4);
}

.sf-ring.r2::after {
    display: none;
}

.sf-ring.r3 {
    width: 320px;
    height: 320px;
    margin: -160px 0 0 -160px;
    border-style: dashed;
    border-color: rgba(0, 229, 255, 0.12);
    animation: sfSpin 40s linear infinite reverse;
}

.sf-ring.r3::before,
.sf-ring.r3::after {
    display: none;
}

.sf-scanbeam {
    position: absolute;
    left: -10%;
    right: -10%;
    top: -30%;
    height: 180px;
    background: linear-gradient(180deg, transparent, rgba(0, 229, 255, 0.10), transparent);
    filter: blur(2px);
    animation: sfScanDown 7s linear infinite;
}

@keyframes sfSpin {
    to { transform: rotate(360deg); }
}

@keyframes sfSpinRev {
    to { transform: rotate(-360deg); }
}

@keyframes sfScanDown {
    0% { top: -30%; opacity: 0; }
    15% { opacity: 1; }
    85% { opacity: 1; }
    100% { top: 120%; opacity: 0; }
}

/* --- Status chips (HUD) --- */
.sf-hud-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 28px;
}

.sf-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: 0.62rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: rgba(0, 229, 255, 0.04);
    border: 1px solid var(--border);
    box-shadow: inset 0 0 14px rgba(0, 229, 255, 0.04);
}

.sf-chip .sf-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #00e5a0;
    box-shadow: 0 0 10px #00e5a0;
    animation: sfBlink 2s ease-in-out infinite;
}

.sf-chip:nth-child(2) .sf-dot {
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    animation-delay: 0.4s;
}

.sf-chip:nth-child(3) .sf-dot {
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation-delay: 0.8s;
}

@keyframes sfBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.25; }
}

/* --- Eyebrow terminal cursor --- */
.sf-eyebrow::after {
    content: '';
    width: 7px;
    height: 12px;
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    animation: sfCaret 1.1s steps(1) infinite;
}

@keyframes sfCaret {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* --- Navbar scan --- */
.navbar::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.35;
    animation: sfNavScan 6s ease-in-out infinite;
}

@keyframes sfNavScan {
    0%, 100% { transform: translateX(-40%); }
    50% { transform: translateX(40%); }
}

.navbar-brand:hover .brand-gradient {
    animation: sfBrandFlicker 0.5s steps(1) 1;
}

@keyframes sfBrandFlicker {
    0%, 100% { opacity: 1; }
    20% { opacity: 0.4; }
    40% { opacity: 1; }
    60% { opacity: 0.6; }
}

/* --- Alert HUD extras --- */
.sf-alert {
    background:
        repeating-linear-gradient(0deg, rgba(0, 229, 255, 0.025) 0 1px, transparent 1px 4px),
        rgba(8, 12, 28, 0.9);
    border-radius: 4px;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.sf-alert-corners {
    position: absolute;
    inset: 6px;
    pointer-events: none;
    z-index: 1;
}

.sf-alert-corners::before,
.sf-alert-corners::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border-color: var(--alert-color, var(--primary));
    border-style: solid;
    opacity: 0.75;
}

.sf-alert-corners::before {
    top: 0;
    left: 0;
    border-width: 1px 0 0 1px;
}

.sf-alert-corners::after {
    bottom: 0;
    right: 0;
    border-width: 0 1px 1px 0;
}

.sf-alert-icon {
    animation: sfIconPulse 2.4s ease-in-out infinite;
}

.sf-alert-error .sf-alert-icon,
.sf-alert-danger .sf-alert-icon {
    animation: sfIconPulse 1.1s ease-in-out infinite, sfIconShake 3s steps(1) infinite;
}

.sf-alert-progress {
    height: 3px;
    filter: drop-shadow(0 0 8px var(--alert-color, var(--primary)));
}

.sf-alert-scan {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.06), transparent);
    height: 40%;
    animation: sfAlertScan 3.2s linear infinite;
    opacity: 0.5;
}

@keyframes sfIconPulse {
    0%, 100% { box-shadow: 0 0 12px var(--alert-tint, rgba(0, 229, 255, 0.15)); }
    50% { box-shadow: 0 0 24px var(--alert-tint, rgba(0, 229, 255, 0.3)); }
}

@keyframes sfIconShake {
    0%, 92%, 100% { transform: translateX(0); }
    93% { transform: translateX(-2px); }
    94% { transform: translateX(2px); }
    95% { transform: translateX(-1px); }
    96% { transform: translateX(0); }
}

@keyframes sfAlertScan {
    from { transform: translateY(-120%); }
    to { transform: translateY(320%); }
}

/* --- Feature card holographic sweep --- */
.feature-btn {
    border-radius: 4px;
    clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.feature-btn::after {
    background:
        linear-gradient(115deg, transparent 30%, rgba(0, 229, 255, 0.10) 48%, rgba(255, 255, 255, 0.06) 50%, transparent 68%),
        radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.10), transparent 65%);
    background-size: 250% 100%, 100% 100%;
    background-position: -120% 0, 0 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-btn:hover::after {
    opacity: 1;
    animation: sfSweep 1.4s ease-out;
}

@keyframes sfSweep {
    from { background-position: -120% 0, 0 0; }
    to { background-position: 220% 0, 0 0; }
}

/* --- Gallery HUD --- */
.drawing-card {
    border-radius: 4px;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.drawing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--primary), transparent);
    opacity: 0.5;
    z-index: 2;
}

/* --- Buttons energy pulse --- */
.sf-btn-primary {
    animation: sfBtnPulse 3.4s ease-in-out infinite;
}

@keyframes sfBtnPulse {
    0%, 100% { box-shadow: 0 8px 26px rgba(0, 229, 255, 0.28); }
    50% { box-shadow: 0 8px 34px rgba(0, 229, 255, 0.45), 0 0 22px rgba(123, 97, 255, 0.35); }
}

/* --- Section divider glow --- */
.sf-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
    opacity: 0.5;
    box-shadow: 0 0 16px var(--glow);
}

@media (prefers-reduced-motion: reduce) {
    .sf-ring,
    .sf-ring::before,
    .sf-scanbeam,
    .sf-particles,
    .sf-cursor-glow,
    .sf-chip .sf-dot,
    .sf-eyebrow::after,
    .navbar::before,
    .sf-alert-icon,
    .sf-alert-scan,
    .sf-btn-primary,
    .card,
    .sf-panel {
        animation: none !important;
    }

    .hero-section h1::before,
    .hero-section h1::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .sf-ring {
        width: 340px;
        height: 340px;
        margin: -170px 0 0 -170px;
    }

    .sf-ring.r2 {
        width: 480px;
        height: 480px;
        margin: -240px 0 0 -240px;
    }

    .sf-ring.r3 {
        display: none;
    }

    .sf-cursor-glow {
        display: none;
    }

    .sf-particles {
        opacity: 0.45;
    }
}

/* ===== THEME TRANSITION ===== */
body::before,
body::after {
    transition: opacity 480ms cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle i {
    transition: transform 480ms cubic-bezier(0.4, 0, 0.2, 1), color 200ms ease;
}

::view-transition-old(root),
::view-transition-new(root) {
    animation-duration: 480ms;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    animation-fill-mode: both;
    mix-blend-mode: normal;
}

::view-transition-old(root) {
    animation-name: sf-theme-fade-out;
}

::view-transition-new(root) {
    animation-name: sf-theme-fade-in;
}

@keyframes sf-theme-fade-out {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes sf-theme-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

html.sf-theme-transition,
html.sf-theme-transition body,
html.sf-theme-transition body *,
html.sf-theme-transition body *::before,
html.sf-theme-transition body *::after {
    transition:
        background-color 480ms cubic-bezier(0.4, 0, 0.2, 1),
        color 480ms cubic-bezier(0.4, 0, 0.2, 1),
        border-color 480ms cubic-bezier(0.4, 0, 0.2, 1),
        outline-color 480ms cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 480ms cubic-bezier(0.4, 0, 0.2, 1),
        fill 480ms cubic-bezier(0.4, 0, 0.2, 1),
        stroke 480ms cubic-bezier(0.4, 0, 0.2, 1) !important;
}

@media (prefers-reduced-motion: reduce) {
    ::view-transition-old(root),
    ::view-transition-new(root) {
        animation-duration: 0.01ms;
    }

    html.sf-theme-transition body,
    html.sf-theme-transition body * {
        transition: none !important;
    }
}