/* ==========================================================================
   FileOrbit — "Dark Observatory" Design System
   A mission-control aesthetic: phosphor green on deep space,
   monospace data displays, precise geometry, atmospheric depth.
   ========================================================================== */

/* ---- CSS Custom Properties ---- */
:root {
    --bg-0: #060610;
    --bg-1: #0c0c1a;
    --bg-2: #141428;
    --bg-3: #1c1c38;
    --bg-hover: #1e1e3a;
    --border: #252548;
    --border-hover: #35356a;
    --border-active: #39ff14;

    --text-1: #e2e0ef;
    --text-2: #8a88a8;
    --text-3: #5a587a;
    --text-inverse: #060610;

    --accent: #39ff14;
    --accent-dim: rgba(57, 255, 20, 0.07);
    --accent-mid: rgba(57, 255, 20, 0.18);
    --accent-glow: rgba(57, 255, 20, 0.35);
    --accent-text: #39ff14;

    --info: #5eaaff;
    --warning: #ffb020;
    --danger: #ff3b5c;
    --danger-dim: rgba(255, 59, 92, 0.1);
    --success: #39ff14;

    --font-body: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

    --radius-sm: 3px;
    --radius: 6px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
    --shadow: 0 4px 16px rgba(0,0,0,0.5);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);

    --transition: 0.2s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-0);
    color: var(--text-1);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 50% 0%, rgba(57, 255, 20, 0.03) 0%, transparent 50%),
        radial-gradient(circle, var(--border) 0.5px, transparent 0.5px);
    background-size: 100% 100%, 20px 20px;
    background-position: center top, center center;
}

::selection {
    background: var(--accent-mid);
    color: var(--text-1);
}

a {
    color: var(--accent-text);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--text-1);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-1);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* ---- Utility ---- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

.mono { font-family: var(--font-mono); }
.accent { color: var(--accent-text); }
.text-muted { color: var(--text-3); }
.inline-form { display: inline; }

/* ---- Typography ---- */
h1, h2, h3, h4 {
    font-family: var(--font-mono);
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: 1px solid var(--border);
    background: var(--bg-2);
    color: var(--text-2);
    cursor: pointer;
    transition: all var(--transition);
    border-radius: var(--radius-sm);
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover {
    border-color: var(--border-hover);
    color: var(--text-1);
    background: var(--bg-3);
}
.btn-primary {
    background: var(--accent);
    color: var(--text-inverse);
    border-color: var(--accent);
}
.btn-primary:hover {
    background: #30e010;
    border-color: #30e010;
    color: var(--text-inverse);
    box-shadow: 0 0 20px var(--accent-glow);
}
.btn-ghost {
    background: transparent;
    border-color: transparent;
}
.btn-ghost:hover {
    background: var(--accent-dim);
    border-color: var(--border);
    color: var(--accent-text);
}
.btn-danger-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--danger);
}
.btn-danger-ghost:hover {
    background: var(--danger-dim);
    border-color: var(--danger);
}
.btn-full { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 0.72rem; }
.btn-xs { padding: 4px 10px; font-size: 0.68rem; }

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-3);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.btn-icon:hover {
    color: var(--accent-text);
    border-color: var(--border);
    background: var(--accent-dim);
}

/* ---- Inputs ---- */
input[type="text"],
input[type="password"],
input[type="datetime-local"],
input[type="email"],
textarea, select {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: var(--bg-1);
    border: 1px solid var(--border);
    color: var(--text-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    outline: none;
}
input:focus, textarea:focus, select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}
input::placeholder {
    color: var(--text-3);
    font-style: italic;
}
input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.input-group label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-2);
}
.input-with-prefix {
    display: flex;
    align-items: stretch;
}
.input-prefix {
    display: flex;
    align-items: center;
    padding: 0 10px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-right: none;
    color: var(--text-3);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    white-space: nowrap;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}
.input-with-prefix input {
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-2);
    cursor: pointer;
    margin-top: 4px;
}
.checkbox-label input[type="checkbox"] {
    width: auto;
    accent-color: var(--accent);
}
.checkbox-label span {
    text-transform: none;
    letter-spacing: 0;
    font-weight: 400;
}

/* ---- Alerts ---- */
.alert {
    padding: 12px 18px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    border: 1px solid;
    animation: alertSlideIn 0.3s ease;
}
.alert-error {
    background: var(--danger-dim);
    border-color: var(--danger);
    color: var(--danger);
}
.alert-success {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent-text);
}

@keyframes alertSlideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Login / Landing Page
   ========================================================================== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow: hidden;
}
.login-page::before {
    content: '';
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(57, 255, 20, 0.06) 0%, transparent 70%);
    pointer-events: none;
    animation: heroGlow 6s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { opacity: 0.5; transform: translateX(-50%) scale(1); }
    100% { opacity: 1; transform: translateX(-50%) scale(1.15); }
}

.landing-container {
    width: 100%;
    max-width: 520px;
    animation: fadeInUp 0.6s ease;
}

/* ---- Landing Hero ---- */
.landing-hero {
    text-align: center;
    margin-bottom: 44px;
}

.landing-title {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    margin-bottom: 10px;
    line-height: 1.1;
}

.landing-tagline {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.15em;
    color: var(--text-2);
    text-transform: uppercase;
}

/* ---- Orbital Animation (enhanced) ---- */
.orbital-icon {
    position: relative;
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
}
.orbital-icon-lg {
    width: 96px;
    height: 96px;
    margin-bottom: 28px;
}

.orbit-ring {
    position: absolute;
    inset: 0;
    border: 1.5px solid var(--accent);
    border-radius: 50%;
    opacity: 0.3;
    animation: orbitPulse 3s ease-in-out infinite;
}
.orbit-ring-2 {
    inset: -10px;
    border-color: var(--info);
    opacity: 0.15;
    animation-delay: 1.5s;
    animation-duration: 4s;
}
.orbit-ring-3 {
    inset: -22px;
    border-color: var(--accent);
    opacity: 0.08;
    border-width: 1px;
    border-style: dashed;
    animation: orbitSpin 20s linear infinite;
}
.orbit-core {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(57, 255, 20, 0.15);
    animation: corePulse 2s ease-in-out infinite;
}

.orbit-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--accent-glow);
}
.orbit-particle-1 {
    top: 0; left: 50%;
    transform: translateX(-50%);
    animation: particleOrbit1 4s linear infinite;
    transform-origin: 50% calc(48px);
}
.orbital-icon-lg .orbit-particle-1 {
    transform-origin: 50% calc(48px);
}
.orbit-particle-2 {
    top: 50%; right: -10px;
    animation: particleFloat 3s ease-in-out infinite;
    opacity: 0.6;
    width: 3px; height: 3px;
    background: var(--info);
    box-shadow: 0 0 6px rgba(94, 170, 255, 0.4);
}
.orbit-particle-3 {
    bottom: -14px; left: 30%;
    animation: particleFloat 4s ease-in-out 1s infinite;
    opacity: 0.4;
    width: 2px; height: 2px;
}

@keyframes orbitPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.5; }
}
@keyframes corePulse {
    0%, 100% { box-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(57, 255, 20, 0.15); }
    50% { box-shadow: 0 0 30px var(--accent-glow), 0 0 60px rgba(57, 255, 20, 0.25); }
}
@keyframes orbitSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
@keyframes particleOrbit1 {
    from { transform: translateX(-50%) rotate(0deg); }
    to { transform: translateX(-50%) rotate(360deg); }
}
@keyframes particleFloat {
    0%, 100% { transform: translateY(0); opacity: 0.4; }
    50% { transform: translateY(-6px); opacity: 0.8; }
}

/* ---- Landing Features ---- */
.landing-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 40px;
}
.feature-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.feature-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-3);
    transform: translateY(-1px);
}
.feature-icon {
    font-size: 1.15rem;
    line-height: 1;
    flex-shrink: 0;
}
.feature-text {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-2);
    letter-spacing: 0.03em;
    line-height: 1.35;
}

/* ---- Hidden Login Panel ---- */
.login-panel {
    margin-bottom: 32px;
    padding: 28px;
    background: var(--bg-1);
    border: 1px solid var(--border-active);
    border-radius: var(--radius);
    box-shadow: 0 0 30px rgba(57, 255, 20, 0.06), var(--shadow);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    transform-origin: top center;
}
.login-panel.hidden {
    display: none;
}
.login-panel.reveal {
    animation: panelReveal 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes panelReveal {
    from { opacity: 0; transform: scaleY(0.85) translateY(-10px); }
    to { opacity: 1; transform: scaleY(1) translateY(0); }
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-footer {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-3);
    letter-spacing: 0.1em;
}

/* ---- Landing Footer ---- */
.landing-footer {
    text-align: center;
    padding-top: 8px;
}
.landing-footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 14px;
}
.landing-github-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-2);
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    letter-spacing: 0.04em;
}
.landing-github-link svg {
    opacity: 0.7;
    transition: opacity var(--transition);
}
.landing-github-link:hover {
    color: var(--text-1);
    border-color: var(--border-hover);
    background: var(--bg-2);
}
.landing-github-link:hover svg {
    opacity: 1;
}
.landing-separator {
    color: var(--text-3);
    font-size: 0.7rem;
}
.landing-license {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-3);
    letter-spacing: 0.06em;
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.landing-footer-meta {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-3);
    letter-spacing: 0.08em;
    margin-top: 4px;
}

/* Single trigger (hidden easter egg) */
.single-trigger {
    cursor: default;
    user-select: none;
    -webkit-user-select: none;
    transition: color 0.2s ease;
}
.single-trigger:hover {
    color: var(--text-2);
}
.single-trigger.pulse {
    color: var(--accent-text);
    animation: singlePulse 0.25s ease;
}
@keyframes singlePulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

/* ---- Responsive landing ---- */
@media (max-width: 480px) {
    .landing-title { font-size: 2rem; }
    .landing-features { grid-template-columns: 1fr; }
    .landing-container { max-width: 100%; }
}

/* Protected file info */
.protected-file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
    padding: 14px 18px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
}
.protected-filename {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-1);
}

/* Password prompt page (protected files) */
.login-container {
    width: 100%;
    max-width: 380px;
    animation: fadeInUp 0.5s ease;
}
.login-brand {
    text-align: center;
    margin-bottom: 36px;
}
.brand-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}
.login-subtitle {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.25em;
    color: var(--text-3);
    text-transform: uppercase;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   App Layout
   ========================================================================== */
.app-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---- Top Bar ---- */
.top-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 24px;
    height: 56px;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.top-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.6;
}

.top-bar-left { display: flex; align-items: center; }
.top-bar-center { flex: 1; display: flex; justify-content: center; }
.top-bar-right { display: flex; align-items: center; gap: 8px; }

.brand-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.brand-icon {
    color: var(--accent-text);
    font-size: 1.2rem;
    line-height: 1;
}
.brand-text {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: 0.02em;
}

/* ---- Search ---- */
.search-wrap {
    position: relative;
    width: 100%;
    max-width: 400px;
}
.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-3);
    font-size: 1.1rem;
    pointer-events: none;
}
.search-input {
    padding-left: 36px !important;
    background: var(--bg-0) !important;
    border-color: var(--border) !important;
    height: 36px;
    font-size: 0.82rem !important;
}
.search-input:focus {
    border-color: var(--accent) !important;
}

/* ---- Main Content ---- */
.main-content {
    flex: 1;
    padding: 28px 24px;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* ==========================================================================
   Upload Section
   ========================================================================== */
.upload-section {
    margin-bottom: 32px;
}

.upload-zone {
    border: 1.5px dashed var(--border);
    border-radius: var(--radius);
    padding: 36px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--bg-1);
}
.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-dim);
}
.upload-zone.drag-over {
    box-shadow: inset 0 0 30px var(--accent-dim);
}

.upload-icon {
    color: var(--text-3);
    margin-bottom: 12px;
    transition: color var(--transition);
}
.upload-zone:hover .upload-icon {
    color: var(--accent-text);
}

.upload-text {
    font-size: 0.9rem;
    color: var(--text-2);
    margin-bottom: 4px;
}
.upload-link {
    color: var(--accent-text);
    cursor: pointer;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.upload-hint {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-3);
}

.upload-options {
    display: none;
    margin-top: 16px;
    padding: 20px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    animation: fadeInUp 0.3s ease;
}
.upload-options.active {
    display: block;
}

.upload-file-preview {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-1);
}
.upload-file-preview:empty { display: none; }

.upload-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

/* ==========================================================================
   Form Layout
   ========================================================================== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.form-grid .full-width {
    grid-column: 1 / -1;
}

.form-section {
    margin-bottom: 28px;
}
.form-section-title {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    color: var(--text-3);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* ---- File Info Grid (edit page) ---- */
.file-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 24px;
}
.info-card {
    padding: 14px 16px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.info-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.15em;
    color: var(--text-3);
    text-transform: uppercase;
    margin-bottom: 4px;
}
.info-value {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-1);
    word-break: break-all;
}

/* ==========================================================================
   Files Grid
   ========================================================================== */
.files-section {
    animation: fadeInUp 0.4s ease;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
}
.section-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    color: var(--text-3);
    text-transform: uppercase;
}
.file-count {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    padding: 2px 8px;
    background: var(--accent-dim);
    color: var(--accent-text);
    border-radius: 10px;
    border: 1px solid rgba(57, 255, 20, 0.15);
}

.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 14px;
}

/* ---- File Card ---- */
.file-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
    animation: cardFadeIn 0.4s ease both;
}
.file-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.file-card:hover .file-card-header {
    border-color: var(--border-hover);
}

.file-card:nth-child(1) { animation-delay: 0.0s; }
.file-card:nth-child(2) { animation-delay: 0.04s; }
.file-card:nth-child(3) { animation-delay: 0.08s; }
.file-card:nth-child(4) { animation-delay: 0.12s; }
.file-card:nth-child(5) { animation-delay: 0.16s; }
.file-card:nth-child(6) { animation-delay: 0.20s; }
.file-card:nth-child(7) { animation-delay: 0.24s; }
.file-card:nth-child(8) { animation-delay: 0.28s; }

@keyframes cardFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.file-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    transition: border-color var(--transition);
}

.file-type-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--accent-dim);
    color: var(--accent-text);
    border: 1px solid rgba(57, 255, 20, 0.15);
    border-radius: 2px;
}
.file-type-badge-lg {
    padding: 6px 14px;
    font-size: 0.75rem;
}

.file-badges {
    display: flex;
    gap: 6px;
}
.badge {
    font-size: 0.75rem;
    line-height: 1;
}
.badge-locked { color: var(--warning); }
.badge-expires { color: var(--info); }

.file-card-body {
    padding: 14px 16px 12px;
}

.file-name {
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 4px;
    line-height: 1.3;
}
.file-desc {
    font-size: 0.78rem;
    color: var(--text-2);
    margin-bottom: 8px;
    line-height: 1.4;
}
.file-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-3);
}
.meta-dot {
    color: var(--border);
}

.file-url-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-2);
    border-top: 1px solid var(--border);
}
.file-url-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}
.file-url-text {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-3);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-card-actions {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    border-top: 1px solid var(--border);
    background: var(--bg-1);
}

/* ==========================================================================
   Page Container (Edit, Analytics)
   ========================================================================== */
.page-container {
    max-width: 800px;
    animation: fadeInUp 0.4s ease;
}

.page-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}
.page-title {
    font-size: 1.3rem;
    color: var(--text-1);
}
.page-subtitle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-2);
    margin-top: 2px;
}

/* ==========================================================================
   Analytics
   ========================================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 32px;
}
.stat-card {
    padding: 20px 18px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
    transition: border-color var(--transition);
}
.stat-card:hover {
    border-color: var(--border-hover);
}
.stat-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-text);
    margin-bottom: 6px;
    line-height: 1;
}
.stat-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--text-3);
    text-transform: uppercase;
}

/* ---- Bar Chart ---- */
.chart-section {
    margin-bottom: 32px;
    padding: 20px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.chart-section .section-title {
    margin-bottom: 20px;
}

.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 160px;
    padding-bottom: 24px;
    position: relative;
}

.bar-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: flex-end;
    position: relative;
}
.bar-col:hover .bar {
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}
.bar-col:hover .bar-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

.bar {
    width: 100%;
    max-width: 24px;
    background: var(--accent-mid);
    border-radius: 2px 2px 0 0;
    transition: all var(--transition);
    min-height: 2px;
}
.bar-label {
    position: absolute;
    bottom: 0;
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: var(--text-3);
    white-space: nowrap;
    transform: rotate(-45deg);
    transform-origin: top right;
}
.bar-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 10px;
    background: var(--bg-3);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-1);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
    z-index: 10;
    text-align: center;
    line-height: 1.5;
}

/* ---- Referrers ---- */
.referrers-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.referrer-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}
.referrer-name {
    flex: 0 0 200px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-2);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.referrer-bar-wrap {
    flex: 1;
    height: 6px;
    background: var(--bg-2);
    border-radius: 3px;
    overflow: hidden;
}
.referrer-bar {
    height: 100%;
    background: var(--accent-mid);
    border-radius: 3px;
    transition: width 0.6s ease;
    min-width: 4px;
}
.referrer-count {
    flex: 0 0 40px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-text);
    text-align: right;
}

/* ---- Data Table ---- */
.table-wrap {
    overflow-x: auto;
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}
.data-table th {
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-3);
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-2);
}
.data-table tr:last-child td {
    border-bottom: none;
}
.data-table tr:hover td {
    background: var(--accent-dim);
}

/* ==========================================================================
   Empty State
   ========================================================================== */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
    text-align: center;
}
.empty-icon {
    color: var(--text-3);
    margin-bottom: 16px;
    opacity: 0.4;
}
.empty-text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-2);
    margin-bottom: 6px;
}
.empty-hint {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-3);
}

/* ==========================================================================
   Toast / Copy Confirmation
   ========================================================================== */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 20px;
    background: var(--bg-3);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-text);
    box-shadow: var(--shadow-lg), 0 0 20px var(--accent-dim);
    z-index: 1000;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2s forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes toastOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(10px); }
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 900px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .file-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .referrer-name {
        flex: 0 0 120px;
    }
}

@media (max-width: 768px) {
    .top-bar {
        padding: 0 16px;
        gap: 10px;
    }
    .top-bar-center {
        display: none;
    }
    .main-content {
        padding: 20px 16px;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .files-grid {
        grid-template-columns: 1fr;
    }
    .upload-zone {
        padding: 24px 16px;
    }
    .brand-text {
        display: none;
    }
    .search-mobile {
        display: block;
        margin-bottom: 16px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .stat-card {
        padding: 14px 12px;
    }
    .stat-value {
        font-size: 1.2rem;
    }
    .file-info-grid {
        grid-template-columns: 1fr 1fr;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .referrer-row {
        flex-wrap: wrap;
    }
    .referrer-name {
        flex: 1 1 100%;
    }
    .referrer-bar-wrap {
        flex: 1;
    }
}