/* LapseLogic — Styles */
/* ====================================================
   Design System: Dark cinematic theme with camera LCD aesthetics
   Colors: Charcoal #1A1A2E, Midnight #16213E, Cyan #0EA5E9, Amber #F59E0B, Green #10B981
   Fonts: Space Grotesk (headings), Inter (body), JetBrains Mono (numbers)
   ==================================================== */

/* ── CSS Custom Properties ─────────────────────────── */
:root {
    /* Backgrounds */
    --bg-deep: #0F0F1A;
    --bg-primary: #1A1A2E;
    --bg-secondary: #16213E;
    --bg-card: rgba(22, 33, 62, 0.55);
    --bg-card-hover: rgba(22, 33, 62, 0.75);
    --bg-input: rgba(15, 15, 30, 0.8);

    /* Accents */
    --cyan: #0EA5E9;
    --cyan-glow: rgba(14, 165, 233, 0.35);
    --cyan-dim: rgba(14, 165, 233, 0.15);
    --amber: #F59E0B;
    --amber-glow: rgba(245, 158, 11, 0.25);
    --green: #10B981;
    --green-glow: rgba(16, 185, 129, 0.25);
    --red: #EF4444;
    --red-glow: rgba(239, 68, 68, 0.25);

    /* Text */
    --text-primary: #E8ECF1;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    /* Borders */
    --border-subtle: rgba(148, 163, 184, 0.12);
    --border-focus: var(--cyan);

    /* Fonts */
    --font-heading: 'Space Grotesk', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --gap: 1rem;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-pill: 999px;

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --duration: 0.25s;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ── Film-Grain / Scanline Overlay ─────────────────── */
.film-grain {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.035;
    background-image: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(255, 255, 255, 0.03) 2px,
        rgba(255, 255, 255, 0.03) 4px
    );
}

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

.hidden {
    display: none !important;
}

/* ── Header ────────────────────────────────────────── */
.site-header {
    background: linear-gradient(180deg, rgba(22, 33, 62, 0.9) 0%, rgba(15, 15, 26, 0.95) 100%);
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.aperture-icon {
    color: var(--cyan);
    flex-shrink: 0;
    animation: aperture-spin 20s linear infinite;
}

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

.site-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--cyan), #38BDF8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.site-tagline {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.mode-toggle-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-pill);
    padding: 0.4rem 0.9rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    white-space: nowrap;
}

.mode-toggle-btn:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    background: var(--cyan-dim);
}

.mode-toggle-btn.active {
    border-color: var(--amber);
    color: var(--amber);
    background: var(--amber-glow);
}

.mode-toggle-icon {
    font-size: 1rem;
}

/* ── Main Content ──────────────────────────────────── */
.main-content {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
}

/* ── Ad Placeholders ───────────────────────────────── */
.ad-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px dashed var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.7rem;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    margin: 0.75rem auto;
    background: rgba(22, 33, 62, 0.2);
}

.ad-desktop {
    width: 728px;
    height: 90px;
    max-width: 100%;
}

.ad-mobile {
    width: 320px;
    height: 50px;
    display: none;
}

@media (max-width: 768px) {
    .ad-desktop { display: none; }
    .ad-mobile { display: flex; }
}

/* ── Quick Presets Bar ─────────────────────────────── */
.presets-bar {
    margin: 0.75rem 0;
}

.presets-scroll {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.25rem 0;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-secondary) transparent;
    -webkit-overflow-scrolling: touch;
}

.presets-scroll::-webkit-scrollbar {
    height: 4px;
}

.presets-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.presets-scroll::-webkit-scrollbar-thumb {
    background: var(--bg-secondary);
    border-radius: 2px;
}

.preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 0.55rem 0.85rem;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    flex-shrink: 0;
    min-width: 90px;
    color: var(--text-primary);
    font-family: var(--font-body);
}

.preset-btn:hover {
    border-color: var(--cyan);
    background: var(--cyan-dim);
    transform: translateY(-2px);
}

.preset-btn.active {
    border-color: var(--cyan);
    background: var(--cyan-dim);
    box-shadow: 0 0 16px var(--cyan-glow);
}

.preset-emoji {
    font-size: 1.3rem;
}

.preset-name {
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
}

.preset-detail {
    font-size: 0.6rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ── Mode Indicator ────────────────────────────────── */
.mode-indicator {
    text-align: center;
    margin: 0.5rem 0;
}

.mode-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-family: var(--font-mono);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-pill);
    letter-spacing: 0.02em;
}

.mode-badge--normal {
    background: var(--cyan-dim);
    color: var(--cyan);
    border: 1px solid rgba(14, 165, 233, 0.25);
}

.mode-badge--reverse {
    background: var(--amber-glow);
    color: var(--amber);
    border: 1px solid rgba(245, 158, 11, 0.25);
}

/* ── Input Panel ───────────────────────────────────── */
.input-panel {
    background: linear-gradient(145deg, var(--bg-secondary), var(--bg-primary));
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.panel-title {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.input-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

@media (min-width: 640px) {
    .input-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.input-label {
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
}

.input-hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 0.2rem;
}

.duration-inputs {
    display: flex;
    gap: 0.5rem;
}

.input-field-wrap {
    position: relative;
    display: flex;
    align-items: center;
    flex: 1;
}

.input-field {
    width: 100%;
    background: var(--bg-input);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.75rem;
    padding-right: 2.5rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 500;
    outline: none;
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
    -moz-appearance: textfield;
}

.input-field::-webkit-inner-spin-button,
.input-field::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.input-field:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px var(--cyan-glow), inset 0 0 8px rgba(14, 165, 233, 0.05);
}

.input-unit {
    position: absolute;
    right: 0.65rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    pointer-events: none;
}

/* ── Select Dropdown ───────────────────────────────── */
.select-wrap {
    position: relative;
}

.input-select {
    width: 100%;
    background: var(--bg-input);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%2364748B'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.input-select:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px var(--cyan-glow);
}

.input-select option {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* ── FPS Toggle Buttons ────────────────────────────── */
.fps-toggles {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.fps-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    background: var(--bg-input);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.7rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    min-width: 52px;
}

.fps-btn:hover {
    border-color: var(--cyan);
    color: var(--text-primary);
}

.fps-btn.active {
    background: var(--cyan-dim);
    border-color: var(--cyan);
    color: var(--cyan);
    box-shadow: 0 0 10px var(--cyan-glow);
}

.fps-sub {
    font-size: 0.55rem;
    color: var(--text-muted);
    margin-top: -1px;
}

.fps-btn.active .fps-sub {
    color: rgba(14, 165, 233, 0.7);
}

.fps-custom-wrap {
    margin-top: 0.4rem;
    max-width: 140px;
}

/* ── File Format Toggle Buttons ────────────────────── */
.format-toggles {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.format-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    background: var(--bg-input);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.4rem 0.6rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
}

.format-btn:hover {
    border-color: var(--cyan);
    color: var(--text-primary);
}

.format-btn.active {
    background: var(--cyan-dim);
    border-color: var(--cyan);
    color: var(--cyan);
}

.format-size {
    font-size: 0.58rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.format-btn.active .format-size {
    color: rgba(14, 165, 233, 0.7);
}

/* ── Camera Settings Collapsible ───────────────────── */
.camera-settings {
    margin-top: 1rem;
    border-top: 1px solid var(--border-subtle);
    padding-top: 0.75rem;
}

.camera-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    list-style: none;
    padding: 0.3rem 0;
    transition: color var(--duration) var(--ease);
    user-select: none;
}

.camera-toggle::-webkit-details-marker {
    display: none;
}

.camera-toggle:hover {
    color: var(--cyan);
}

.camera-toggle-icon {
    font-size: 1rem;
}

.camera-toggle-arrow {
    font-size: 0.7rem;
    transition: transform var(--duration) var(--ease);
    margin-left: auto;
}

.camera-settings[open] .camera-toggle-arrow {
    transform: rotate(90deg);
}

.camera-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 0.75rem;
}

@media (min-width: 640px) {
    .camera-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* ── Results Section ───────────────────────────────── */
.results-section {
    animation: fadeInUp 0.5s var(--ease);
}

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

/* ── Hero Display ──────────────────────────────────── */
.hero-display {
    text-align: center;
    padding: 2rem 1rem;
    margin-bottom: 1.5rem;
    background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
    border-radius: var(--radius);
    position: relative;
}

.hero-label {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.3rem;
}

.hero-value-wrap {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
}

.hero-value {
    font-family: var(--font-mono);
    font-size: 4.5rem;
    font-weight: 700;
    color: var(--cyan);
    line-height: 1;
    text-shadow: 0 0 40px var(--cyan-glow), 0 0 80px rgba(14, 165, 233, 0.15);
    animation: lcd-pulse 3s ease-in-out infinite;
    letter-spacing: -0.02em;
}

@keyframes lcd-pulse {
    0%, 100% { opacity: 1; text-shadow: 0 0 40px var(--cyan-glow), 0 0 80px rgba(14, 165, 233, 0.15); }
    50% { opacity: 0.92; text-shadow: 0 0 30px var(--cyan-glow), 0 0 60px rgba(14, 165, 233, 0.1); }
}

.hero-suffix {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.hero-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

@media (min-width: 640px) {
    .hero-value {
        font-size: 6rem;
    }
}

/* ── Timeline Visualization ────────────────────────── */
.timeline-section {
    margin-bottom: 1.5rem;
}

.timeline-title {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.timeline-strip {
    position: relative;
}

.timeline-film {
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0;
    overflow: hidden;
}

.sprocket-holes {
    display: flex;
    gap: 8px;
    padding: 3px 6px;
    background: rgba(0, 0, 0, 0.3);
}

.sprocket-hole {
    width: 6px;
    height: 4px;
    border-radius: 1px;
    background: rgba(100, 116, 139, 0.25);
    flex-shrink: 0;
}

.timeline-track {
    height: 40px;
    position: relative;
    background: linear-gradient(90deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    display: flex;
    align-items: flex-end;
}

.timeline-tick {
    position: absolute;
    bottom: 0;
    width: 1px;
    background: var(--cyan);
    opacity: 0.7;
    border-radius: 1px 1px 0 0;
}

.timeline-gradient {
    position: absolute;
    inset: 0;
    border-radius: 0;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.3rem;
}

.timeline-labels span {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* ── Stat Cards Grid ───────────────────────────────── */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .stat-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    padding: 1rem 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--duration) var(--ease);
    text-align: center;
}

.stat-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(14, 165, 233, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    font-size: 1.3rem;
    margin-bottom: 0.1rem;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Warnings Panel ────────────────────────────────── */
.warnings-panel {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.warning-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    line-height: 1.4;
    animation: warningSlide 0.3s var(--ease);
}

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

.warning-item--danger {
    background: var(--red-glow);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #FCA5A5;
}

.warning-item--caution {
    background: var(--amber-glow);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #FDE68A;
}

.warning-item--ok {
    background: var(--green-glow);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #6EE7B7;
}

.warning-icon {
    flex-shrink: 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

.warning-text {
    flex: 1;
}

/* ── Copy Bar ──────────────────────────────────────── */
.copy-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-pill);
    padding: 0.55rem 1.2rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
}

.copy-btn:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    background: var(--cyan-dim);
}

.copy-btn:active {
    transform: scale(0.97);
}

.copy-icon {
    font-size: 0.9rem;
}

.copy-toast {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--green);
    animation: toastFade 1.5s var(--ease) forwards;
}

@keyframes toastFade {
    0% { opacity: 0; transform: translateY(4px); }
    20% { opacity: 1; transform: translateY(0); }
    80% { opacity: 1; }
    100% { opacity: 0; }
}

/* ── Footer ────────────────────────────────────────── */
.site-footer {
    text-align: center;
    padding: 1.5rem 1rem;
    border-top: 1px solid var(--border-subtle);
    margin-top: 2rem;
}

.site-footer p {
    font-size: 0.72rem;
    color: var(--text-muted);
    max-width: 520px;
    margin: 0 auto;
}

.footer-copy {
    margin-top: 0.35rem;
    opacity: 0.7;
}

/* ── Responsive Tweaks ─────────────────────────────── */
@media (max-width: 480px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .mode-toggle-btn {
        align-self: flex-end;
        margin-top: -2rem;
    }

    .hero-value {
        font-size: 3.2rem;
    }

    .hero-suffix {
        font-size: 0.9rem;
    }

    .stat-value {
        font-size: 1.1rem;
    }

    .preset-btn {
        min-width: 80px;
        padding: 0.45rem 0.65rem;
    }
}

/* ── Number transition helper ──────────────────────── */
.number-animate {
    transition: transform 0.15s var(--ease);
}