/* TYPOGRAPHY SYSTEM */
:root {
    /* ----- FONT FAMILIES ----- */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
    --font-display: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'SF Mono', 'Menlo', 'Cascadia Mono', 'Consolas', monospace;

    /* ----- FONT WEIGHTS ----- */
    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;

    /* ----- FONT SIZES ----- */
    --fs-xs: clamp(0.625rem, 0.7vw, 0.75rem);
    --fs-sm: clamp(0.75rem, 0.85vw, 0.875rem);
    --fs-base: clamp(1rem, 1.1vw, 1.125rem);
    --fs-lg: clamp(1.125rem, 1.3vw, 1.25rem);
    --fs-xl: clamp(1.25rem, 1.8vw, 1.5rem);
    --fs-2xl: clamp(1.5rem, 2.5vw, 2rem);
    --fs-3xl: clamp(2rem, 3.5vw, 3rem);
    --fs-4xl: clamp(2.5rem, 5vw, 4rem);
    --fs-5xl: clamp(3.25rem, 6.5vw, 5rem);

    /* ----- LINE HEIGHTS ----- */
    --lh-tight: 1.05;
    --lh-snug: 1.2;
    --lh-normal: 1.5;
    --lh-relaxed: 1.65;
    --lh-loose: 1.85;

    /* ----- LETTER SPACING ----- */
    --ls-tight: -0.025em;
    --ls-snug: -0.015em;
    --ls-normal: 0;
    --ls-wide: 0.015em;
    --ls-wider: 0.04em;
    --ls-widest: 0.08em;

    /* ----- BRAND / UI COLORS ----- */
    --navy: #020617;
    --navy-mid: #0f172a;
    --navy-light: #1e293b;
    --slate: #94a3b8;
    --slate-dim: #475569;
    --blue: #3b82f6;
    --blue-dark: #2563eb;
    --blue-glow: rgba(59, 130, 246, 0.25);
    --text: #f1f5f9;
    --text-soft: #e2e8f0;
    --emerald: #10b981;
    --red: #ef4444;
    --red-soft: rgba(239, 68, 68, 0.12);
    --emerald-soft: rgba(16, 185, 129, 0.12);
    --glass-bg: rgba(15, 23, 42, 0.55);
    --glass-border: rgba(148, 163, 184, 0.12);
    --glass-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    --glass-blur: 18px;
    --radius-card: 20px;
    --radius-btn: 99px;
    --radius-sm: 10px;
    --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

/* RESET & BASE */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-weight: var(--fw-regular);
    font-size: var(--fs-base);
    line-height: var(--lh-normal);
    color: var(--text);
    background: var(--navy);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.025) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    top: -240px;
    right: -240px;
    width: 720px;
    height: 720px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.07) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
    color: var(--text);
}

h1 {
    font-size: var(--fs-4xl);
    font-weight: var(--fw-extrabold);
    letter-spacing: var(--ls-tight);
}

h2 {
    font-size: var(--fs-3xl);
    font-weight: var(--fw-bold);
    letter-spacing: var(--ls-snug);
}

h3 {
    font-size: var(--fs-2xl);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-snug);
}

h4 {
    font-size: var(--fs-xl);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-normal);
}

h5 {
    font-size: var(--fs-lg);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-normal);
}

h6 {
    font-size: var(--fs-base);
    font-weight: var(--fw-medium);
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    color: var(--slate);
}

p {
    font-size: var(--fs-base);
    line-height: var(--lh-relaxed);
    color: var(--text-soft);
    max-width: 70ch;
}

a {
    color: var(--blue);
    text-decoration: none;
    transition: color var(--transition);
    font-weight: var(--fw-medium);
}

a:hover {
    color: #60a5fa;
}

strong, b {
    font-weight: var(--fw-bold);
    color: var(--text);
}

em, i {
    font-style: italic;
}

small {
    font-size: var(--fs-sm);
    color: var(--slate);
}

/* Utility Text Classes */
.text-xs { font-size: var(--fs-xs); line-height: var(--lh-normal); }
.text-sm { font-size: var(--fs-sm); line-height: var(--lh-normal); }
.text-base { font-size: var(--fs-base); line-height: var(--lh-normal); }
.text-lg { font-size: var(--fs-lg); line-height: var(--lh-snug); }
.text-xl { font-size: var(--fs-xl); line-height: var(--lh-snug); }
.text-2xl { font-size: var(--fs-2xl); line-height: var(--lh-tight); }
.text-3xl { font-size: var(--fs-3xl); line-height: var(--lh-tight); }
.text-4xl { font-size: var(--fs-4xl); line-height: var(--lh-tight); }

.font-display { font-family: var(--font-display); }
.font-sans { font-family: var(--font-sans); }
.font-mono { font-family: var(--font-mono); }

.fw-light { font-weight: var(--fw-light); }
.fw-regular { font-weight: var(--fw-regular); }
.fw-medium { font-weight: var(--fw-medium); }
.fw-semibold { font-weight: var(--fw-semibold); }
.fw-bold { font-weight: var(--fw-bold); }
.fw-extrabold { font-weight: var(--fw-extrabold); }

.text-muted { color: var(--slate); }
.text-soft { color: var(--text-soft); }

/* Code & Monospace */
code, kbd, pre, samp {
    font-family: var(--font-mono);
    font-size: 0.9em;
    line-height: var(--lh-normal);
}

code:not(pre code) {
    background: rgba(148, 163, 184, 0.08);
    padding: 0.15em 0.5em;
    border-radius: 6px;
    font-size: 0.85em;
    color: var(--text-soft);
    border: 1px solid rgba(148, 163, 184, 0.06);
    white-space: nowrap;
}

pre {
    background: rgba(2, 6, 23, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
    font-size: var(--fs-sm);
    line-height: var(--lh-relaxed);
    color: var(--text-soft);
    backdrop-filter: blur(4px);
}

pre code {
    background: none;
    padding: 0;
    border: none;
    font-size: inherit;
    white-space: pre;
    color: inherit;
}

kbd {
    background: rgba(148, 163, 184, 0.08);
    border: 1px solid rgba(148, 163, 184, 0.12);
    border-radius: 4px;
    padding: 0.1em 0.6em;
    font-size: 0.8em;
    font-weight: var(--fw-medium);
    color: var(--text-soft);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* LAYOUT & COMPONENTS */
.app-wrapper {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 14px 24px;
    background: rgba(2, 6, 23, 0.4);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
    transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
    will-change: transform;
}

.site-header.scrolled {
    background: rgba(2, 6, 23, 0.78);
    border-bottom-color: rgba(148, 163, 184, 0.1);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.4);
}

.header-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-logo {
    height: 44px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 12px rgba(59, 130, 246, 0.25));
    transition: transform var(--transition);
}

.brand-logo:hover {
    transform: scale(1.05) rotate(-1deg);
}

.brand-text {
    font-family: var(--font-display);
    font-weight: var(--fw-extrabold);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    letter-spacing: var(--ls-tight);
    color: var(--text);
    line-height: 1;
}

.brand-text span {
    color: var(--blue);
    position: relative;
}

.brand-text span::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2.5px;
    background: linear-gradient(90deg, var(--blue), transparent);
    border-radius: 99px;
    opacity: 0.4;
}

.brand-badge {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    background: var(--emerald-soft);
    border: 1px solid rgba(16, 185, 129, 0.25);
    color: var(--emerald);
    padding: 3px 12px;
    border-radius: 99px;
    letter-spacing: var(--ls-wide);
    white-space: nowrap;
    backdrop-filter: blur(4px);
    transition: all var(--transition);
    margin-left: 4px;
    text-transform: uppercase;
}

.brand-badge:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.45);
    transform: scale(1.04);
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-desktop a {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--slate);
    text-decoration: none;
    transition: color var(--transition);
    position: relative;
    letter-spacing: var(--ls-normal);
}

.nav-desktop a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: var(--blue);
    border-radius: 99px;
    transition: width var(--transition);
}

.nav-desktop a:hover {
    color: var(--text);
}

.nav-desktop a:hover::after {
    width: 100%;
}

.nav-desktop .nav-cta {
    font-family: var(--font-sans);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-sm);
    background: var(--blue);
    color: #fff !important;
    padding: 8px 22px;
    border-radius: var(--radius-btn);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
    transition: all var(--transition);
    letter-spacing: var(--ls-normal);
}

.nav-desktop .nav-cta:hover {
    background: var(--blue-dark);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.5);
    transform: translateY(-2px);
    color: #fff !important;
}

.nav-desktop .nav-cta::after {
    display: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: background var(--transition);
}

.hamburger:hover {
    background: rgba(148, 163, 184, 0.06);
}

.hamburger span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--text);
    border-radius: 99px;
    transition: all var(--transition);
    transform-origin: center;
}

.hamburger.open span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

.nav-mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 999;
    background: rgba(2, 6, 23, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.nav-mobile-overlay.open {
    opacity: 1;
    visibility: visible;
}

.nav-mobile {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    max-width: 80vw;
    height: 100%;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid rgba(148, 163, 184, 0.08);
    padding: 80px 32px 32px;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 1000;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-mobile.open {
    transform: translateX(0);
}

.nav-mobile a {
    font-family: var(--font-sans);
    font-size: var(--fs-lg);
    font-weight: var(--fw-medium);
    color: var(--text-soft);
    text-decoration: none;
    padding: 12px 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.04);
    transition: color var(--transition);
    letter-spacing: var(--ls-normal);
}

.nav-mobile a:hover {
    color: var(--blue);
}

.nav-mobile .nav-mobile-cta {
    font-family: var(--font-sans);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-base);
    background: var(--blue);
    color: #fff !important;
    padding: 14px 24px;
    border-radius: var(--radius-btn);
    text-align: center;
    border-bottom: none;
    margin-top: 12px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
    letter-spacing: var(--ls-normal);
}

.nav-mobile .nav-mobile-cta:hover {
    background: var(--blue-dark);
    color: #fff !important;
}

/* HERO */
.hero {
    padding-top: 100px;
    margin-bottom: 28px;
}

.hero-title {
    font-family: var(--font-display);
    font-weight: var(--fw-extrabold);
    font-size: var(--fs-4xl);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
    margin-bottom: 12px;
    animation: fadeDown 0.7s var(--transition) both;
}

.hero-title span {
    color: var(--blue);
    position: relative;
}

.hero-title span::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--blue), transparent);
    border-radius: 99px;
    opacity: 0.35;
}

.hero-sub {
    font-family: var(--font-sans);
    font-size: var(--fs-lg);
    font-weight: var(--fw-regular);
    line-height: var(--lh-relaxed);
    color: var(--slate);
    max-width: 560px;
    margin-bottom: 28px;
    animation: fadeDown 0.7s var(--transition) 0.08s both;
}

/* Drop Zone */
.drop-zone {
    border: 1.5px dashed rgba(148, 163, 184, 0.2);
    border-radius: var(--radius-card);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    padding: 56px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 40%, rgba(59, 130, 246, 0.06), transparent 70%);
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: rgba(59, 130, 246, 0.4);
    background: rgba(15, 23, 42, 0.7);
    box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.15), 0 12px 48px rgba(0, 0, 0, 0.5);
    transform: scale(1.005);
}

.drop-zone:hover::before,
.drop-zone.drag-over::before {
    opacity: 1;
}

.drop-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    margin-bottom: 20px;
    transition: all var(--transition);
}

.drop-zone:hover .drop-icon {
    transform: scale(1.08) translateY(-4px);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.25);
    background: rgba(59, 130, 246, 0.14);
}

.drop-icon svg {
    width: 36px;
    height: 36px;
    stroke: var(--blue);
    transition: transform var(--transition);
}

.drop-zone:hover .drop-icon svg {
    transform: translateY(-2px);
}

.drop-title {
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: var(--fw-bold);
    color: var(--text);
    line-height: var(--lh-snug);
    margin-bottom: 6px;
    letter-spacing: var(--ls-snug);
}

.drop-subtitle {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: var(--slate);
    margin-bottom: 18px;
    line-height: var(--lh-normal);
}

.drop-subtitle small {
    font-size: var(--fs-xs);
    color: var(--slate-dim);
}

.drop-formats {
    display: inline-flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.format-tag {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    background: rgba(148, 163, 184, 0.06);
    border: 1px solid rgba(148, 163, 184, 0.12);
    color: var(--slate);
    padding: 4px 14px;
    border-radius: 99px;
    letter-spacing: var(--ls-wide);
    text-transform: uppercase;
    transition: all var(--transition);
}

.format-tag.active {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.25);
    color: var(--blue);
}

.format-tag:hover {
    transform: translateY(-2px);
}

#fileInput {
    display: none;
}

/* Education Box */
.edu-box {
    margin-top: 22px;
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.15);
    border-radius: var(--radius-sm);
    padding: 18px 22px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    animation: fadeUp 0.8s var(--transition) 0.15s both;
    backdrop-filter: blur(4px);
}

.edu-icon {
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
    line-height: 1;
}

.edu-text {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: rgba(239, 68, 68, 0.85);
    line-height: var(--lh-normal);
}

.edu-text strong {
    font-weight: var(--fw-bold);
    color: var(--red);
}

/* ACTION BAR */
.action-bar {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 28px;
    flex-wrap: wrap;
    animation: fadeUp 0.6s var(--transition) both;
}

.action-bar.visible {
    display: flex;
}

.action-bar .action-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    flex: 1;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 28px;
    border-radius: var(--radius-btn);
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: var(--ls-normal);
    line-height: 1.4;
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.96);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: var(--blue);
    color: #fff;
    box-shadow: 0 4px 24px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover:not(:disabled) {
    background: var(--blue-dark);
    box-shadow: 0 8px 40px rgba(59, 130, 246, 0.5);
    transform: translateY(-2px);
}

.btn-ghost {
    background: rgba(148, 163, 184, 0.05);
    color: var(--slate);
    border: 1px solid rgba(148, 163, 184, 0.12);
}

.btn-ghost:hover:not(:disabled) {
    border-color: rgba(148, 163, 184, 0.3);
    color: var(--text);
    background: rgba(148, 163, 184, 0.08);
    transform: translateY(-2px);
}

.btn-success {
    background: var(--emerald);
    color: #fff;
    box-shadow: 0 4px 24px rgba(16, 185, 129, 0.3);
}

.btn-success:hover:not(:disabled) {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 36px rgba(16, 185, 129, 0.4);
}

.btn-sm {
    padding: 7px 20px;
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
}

.btn .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}

.btn-ghost .spinner {
    border-color: rgba(148, 163, 184, 0.2);
    border-top-color: var(--slate);
}

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

/* FILES GRID */
#filesGrid {
    display: grid;
    gap: 24px;
    margin-top: 24px;
}

.file-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: var(--radius-card);
    overflow: hidden;
    animation: slideIn 0.45s var(--transition) both;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.file-card:hover {
    border-color: rgba(148, 163, 184, 0.12);
    box-shadow: 0 8px 48px rgba(0, 0, 0, 0.5);
    transform: translateY(-2px);
}

.file-card.scrubbed {
    border-color: rgba(16, 185, 129, 0.2);
}

@keyframes slideIn {
    0% { opacity: 0; transform: translateY(28px) scale(0.97); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes fadeDown {
    0% { opacity: 0; transform: translateY(-16px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
    0% { opacity: 0; transform: translateY(18px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

/* Card Header */
.card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.04);
}

.card-thumb {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
    background: var(--navy-light);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    overflow: hidden;
    transition: transform var(--transition);
    border: 1px solid rgba(148, 163, 184, 0.06);
}

.card-thumb:hover {
    transform: scale(1.05);
}

.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-meta {
    flex: 1;
    min-width: 0;
}

.card-filename {
    font-family: var(--font-display);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-sm);
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: var(--ls-normal);
}

.card-filesize {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    color: var(--slate-dim);
    margin-top: 2px;
}

.card-status-badge {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    padding: 4px 14px;
    border-radius: 99px;
    flex-shrink: 0;
    letter-spacing: var(--ls-wide);
    text-transform: uppercase;
    transition: all var(--transition);
}

.badge-warn {
    background: rgba(239, 68, 68, 0.1);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-safe {
    background: var(--emerald-soft);
    color: var(--emerald);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-clean {
    background: rgba(59, 130, 246, 0.08);
    color: var(--blue);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.badge-processing {
    background: rgba(148, 163, 184, 0.06);
    color: var(--slate);
    border: 1px solid rgba(148, 163, 184, 0.1);
}

/* Privacy Report */
.privacy-report {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.04);
    animation: fadeIn 0.5s var(--transition) both;
}

.report-title {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    color: var(--slate-dim);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    margin-bottom: 10px;
}

.report-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.report-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    line-height: var(--lh-normal);
    padding: 8px 14px;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.04);
    border: 1px solid rgba(239, 68, 68, 0.06);
    transition: all var(--transition);
}

.report-item:hover {
    background: rgba(239, 68, 68, 0.07);
}

.report-item.safe-item {
    background: var(--emerald-soft);
    border-color: rgba(16, 185, 129, 0.08);
}

.report-item.safe-item:hover {
    background: rgba(16, 185, 129, 0.12);
}

.report-item-icon {
    font-size: 14px;
    flex-shrink: 0;
    margin-top: 1px;
    line-height: 1;
}

.report-item-label {
    color: var(--slate);
    font-weight: var(--fw-medium);
    white-space: nowrap;
    flex-shrink: 0;
}

.report-item-value {
    color: var(--text-soft);
    word-break: break-word;
}

/* Progress Bar */
.progress-wrap {
    padding: 12px 20px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.04);
    display: none;
}

.progress-label {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    color: var(--slate);
    margin-bottom: 6px;
    display: flex;
    justify-content: space-between;
}

.progress-bar-bg {
    height: 4px;
    background: rgba(148, 163, 184, 0.08);
    border-radius: 99px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--blue), #60a5fa);
    border-radius: 99px;
    width: 0%;
    transition: width 0.5s var(--transition);
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.3);
}

/* Thumb Pair */
.thumb-pair {
    display: flex;
    gap: 16px;
    padding: 14px 20px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.04);
    flex-wrap: wrap;
    background: rgba(0, 0, 0, 0.15);
}

.thumb-col {
    flex: 1;
    min-width: 100px;
}

.thumb-col-label {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-wider);
    color: var(--slate-dim);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.thumb-img {
    width: 100%;
    max-height: 110px;
    object-fit: cover;
    border-radius: 10px;
    background: var(--navy-light);
    border: 1px solid rgba(148, 163, 184, 0.06);
    transition: transform var(--transition);
}

.thumb-img:hover {
    transform: scale(1.02);
}

.thumb-separator {
    display: flex;
    align-items: center;
    color: var(--slate-dim);
    font-size: 20px;
    padding-top: 24px;
}

/* Card Footer */
.card-footer {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    flex-wrap: wrap;
}

.section-label {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    color: var(--slate-dim);
    margin-bottom: 14px;
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(148, 163, 184, 0.06);
}

/* TOAST NOTIFICATIONS */
#toastContainer {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: flex-end;
    pointer-events: none;
    max-width: 90vw;
}

.toast {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    background: rgba(15, 23, 42, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(148, 163, 184, 0.08);
    color: var(--text-soft);
    padding: 14px 22px;
    border-radius: var(--radius-sm);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
    animation: toastIn 0.4s var(--transition) both;
    max-width: 380px;
    display: flex;
    align-items: center;
    gap: 10px;
    pointer-events: auto;
    line-height: var(--lh-normal);
}

.toast.success { border-color: rgba(16, 185, 129, 0.2); }
.toast.error { border-color: rgba(239, 68, 68, 0.2); }
.toast.warn { border-color: rgba(234, 179, 8, 0.2); }

@keyframes toastIn {
    0% { opacity: 0; transform: translateX(30px) scale(0.95); }
    100% { opacity: 1; transform: translateX(0) scale(1); }
}

/* COOKIE BANNER */
#cookieBanner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(2, 6, 23, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(148, 163, 184, 0.06);
    padding: 18px 28px;
    z-index: 10000;
    display: none;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 16px 28px;
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: var(--text-soft);
    box-shadow: 0 -8px 48px rgba(0, 0, 0, 0.4);
    animation: slideUp 0.5s var(--transition) both;
}

@keyframes slideUp {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

#cookieBanner a {
    color: var(--blue);
    text-decoration: none;
    font-weight: var(--fw-medium);
    transition: color var(--transition);
}

#cookieBanner a:hover {
    color: #60a5fa;
    text-decoration: underline;
}

#cookieBanner .cookie-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

#cookieBanner .cookie-btn {
    font-family: var(--font-sans);
    padding: 7px 22px;
    border-radius: var(--radius-btn);
    border: none;
    font-weight: var(--fw-semibold);
    font-size: var(--fs-xs);
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: var(--ls-normal);
}

#cookieBanner .cookie-btn-accept {
    background: var(--blue);
    color: #fff;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.25);
}

#cookieBanner .cookie-btn-accept:hover {
    background: var(--blue-dark);
    transform: scale(1.03);
}

#cookieBanner .cookie-btn-deny {
    background: transparent;
    color: var(--slate);
    border: 1px solid rgba(148, 163, 184, 0.12);
}

#cookieBanner .cookie-btn-deny:hover {
    border-color: rgba(148, 163, 184, 0.3);
    color: var(--text);
    background: rgba(148, 163, 184, 0.04);
}

/* FOOTER */
.site-footer {
    text-align: center;
    padding: 40px 0 20px;
    border-top: 1px solid rgba(148, 163, 184, 0.04);
    margin-top: 60px;
    color: var(--slate-dim);
    font-size: var(--fs-sm);
    line-height: var(--lh-normal);
}

.footer-logo {
    width: 56px;
    height: auto;
    margin-bottom: 10px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.04));
    transition: transform var(--transition);
}

.footer-logo:hover {
    transform: scale(1.06) rotate(-1deg);
}

.footer-name {
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    font-size: var(--fs-xl);
    color: var(--text);
    letter-spacing: var(--ls-snug);
}

.footer-tagline {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: var(--slate);
    margin-top: 2px;
}

.privacy-note {
    margin: 12px auto 0;
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: var(--slate);
    max-width: 520px;
    padding: 0 12px;
    line-height: var(--lh-relaxed);
}

.privacy-note i {
    font-style: normal;
}

.ft-lnks {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.ft-lnks a {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--blue);
    text-decoration: none;
    transition: color var(--transition);
    letter-spacing: var(--ls-normal);
}

.ft-lnks a:hover {
    color: #60a5fa;
    text-decoration: underline;
}

.footer-divider {
    width: 48px;
    height: 2px;
    background: rgba(148, 163, 184, 0.06);
    margin: 18px auto;
    border-radius: 99px;
}

.footer-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px 24px;
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    opacity: 0.6;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 12px;
}

/* RESPONSIVE DESIGN */
@media (max-width: 820px) {
    .nav-desktop { display: none; }
    .hamburger { display: flex; }
    .nav-mobile-overlay { display: block; }
    .site-header { padding: 12px 18px; }
    .brand-text { font-size: clamp(1rem, 1.8vw, 1.25rem); }
    .brand-logo { height: 38px; }
    .brand-badge { font-size: var(--fs-xs); padding: 2px 10px; }
    .app-wrapper { padding: 0 16px 40px; }
    .hero { padding-top: 82px; }
    .drop-zone { padding: 40px 20px; }
    .drop-title { font-size: var(--fs-xl); }
    .drop-icon { width: 64px; height: 64px; }
    .drop-icon svg { width: 28px; height: 28px; }
    .action-bar { flex-direction: column; align-items: stretch; }
    .action-bar .action-group { flex: 1; }
    .btn { justify-content: center; padding: 10px 22px; font-size: var(--fs-sm); }
    .thumb-pair { flex-direction: column; }
    .thumb-separator { padding-top: 4px; justify-content: center; }
    .header-inner { gap: 10px; }
}

@media (max-width: 480px) {
    .site-header { padding: 10px 14px; }
    .brand-text { font-size: 1rem; }
    .brand-logo { height: 32px; }
    .brand-badge { display: none; }
    .app-wrapper { padding: 0 12px 32px; }
    .hero { padding-top: 74px; }
    .hero-title { font-size: var(--fs-3xl); }
    .hero-sub { font-size: var(--fs-base); }
    .drop-zone { padding: 30px 16px; }
    .drop-title { font-size: var(--fs-lg); }
    .drop-subtitle { font-size: var(--fs-sm); }
    .drop-icon { width: 56px; height: 56px; margin-bottom: 14px; }
    .drop-icon svg { width: 24px; height: 24px; }
    .format-tag { font-size: var(--fs-xs); padding: 3px 10px; }
    .edu-box { padding: 14px 16px; flex-direction: column; gap: 8px; }
    .edu-text { font-size: var(--fs-sm); }
    .card-header { padding: 12px 14px; flex-wrap: wrap; }
    .card-filename { font-size: var(--fs-sm); }
    .card-status-badge { font-size: var(--fs-xs); padding: 3px 10px; }
    .privacy-report { padding: 12px 14px; }
    .report-item { font-size: var(--fs-sm); padding: 6px 10px; flex-wrap: wrap; }
    .report-item-label { white-space: normal; }
    .card-footer { padding: 10px 14px; flex-direction: column; align-items: stretch; }
    .card-footer .btn { justify-content: center; }
    #toastContainer { bottom: 16px; right: 16px; left: 16px; align-items: stretch; }
    .toast { max-width: 100%; font-size: var(--fs-sm); padding: 12px 16px; }
    #cookieBanner { padding: 14px 16px; flex-direction: column; text-align: center; gap: 12px; }
    #cookieBanner .cookie-actions { justify-content: center; }
    .ft-lnks { gap: 16px; }
    .ft-lnks a { font-size: var(--fs-sm); }
    .footer-meta { flex-direction: column; gap: 4px; font-size: var(--fs-xs); }
    .nav-mobile { width: 280px; max-width: 80vw; padding: 72px 24px 24px; }
    .nav-mobile a { font-size: var(--fs-lg); padding: 8px 0; }
    .nav-mobile .nav-mobile-cta { font-size: var(--fs-base); padding: 12px 20px; }
}

@media (max-width: 360px) {
    .brand-text { font-size: 0.875rem; }
    .brand-logo { height: 28px; }
    .hero-title { font-size: var(--fs-2xl); }
    .drop-zone { padding: 24px 12px; }
    .drop-title { font-size: var(--fs-base); }
    .btn { font-size: var(--fs-sm); padding: 8px 16px; }
    .btn-sm { font-size: var(--fs-xs); padding: 6px 14px; }
}

/* ACCESSIBILITY */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}

:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
    border-radius: 4px;
}

.btn:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
}

a:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
    border-radius: 4px;
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}