/* QR Code Studio — visual identity tracks decisionsciencecorp.com */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-optical-sizing: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;

    /* Colors — same palette as decisionsciencecorp.com */
    --bg-primary: #0a0a0a;
    --bg-secondary: #131313;
    --bg-card: rgba(20, 20, 20, 0.9);
    --text-primary: #fafafa;
    --text-secondary: #e0e0e0;
    --text-muted: #c0c0c0;
    --border-color: rgba(255, 255, 255, 0.1);
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --warn: #fbbf24;
    --warn-soft: rgba(251, 191, 36, 0.12);
    --warn-border: rgba(251, 191, 36, 0.32);
    --error: #fb7185;
    --error-soft: rgba(251, 113, 133, 0.12);
    --error-border: rgba(251, 113, 133, 0.32);

    /* Logo sizing copied from DSC root tokens (keeps wordmark + bar aligned) */
    --brand-wordmark-d-height-em: 0.7222;
    --brand-logo-bar-thickness-ratio: 0.2725;
    --brand-mark-height-em: calc(var(--brand-wordmark-d-height-em) / var(--brand-logo-bar-thickness-ratio));
    --brand-logo-bar-center-ratio: 0.7331;
    --brand-logo-bar-center-offset-ratio: calc(var(--brand-logo-bar-center-ratio) - 0.5);

    --site-nav-height: calc(4.75rem + env(safe-area-inset-top, 0px));
}

@supports (font-variation-settings: normal) {
    :root {
        font-family: "InterVariable", sans-serif;
    }
}

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: clip;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
    min-width: 0;
}

img, svg, canvas {
    max-width: 100%;
    height: auto;
}

/* `display: flex/grid` declarations beat the user-agent `[hidden] { display:none }`
 * rule on specificity. Restore the override globally so `element.hidden = true`
 * actually hides things. */
[hidden] { display: none !important; }

code {
    font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.1rem 0.35rem;
    font-size: 0.88em;
    color: var(--text-primary);
    word-break: break-word;
}

/* ─────────────────────────  Navbar (DSC parity)  ─────────────────────────── */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding-top: env(safe-area-inset-top, 0);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.125rem;
    min-width: 0;
    overflow: hidden;
}

.nav-logo-img {
    height: calc(var(--brand-mark-height-em) * 1em);
    width: auto;
    opacity: 0.95;
    vertical-align: middle;
    align-self: center;
}

.nav-logo-text {
    font-family: "InterDisplay", "Inter", sans-serif;
    font-size: 1em;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.15;
    margin-left: -0.02em;
    transform: translateY(calc(var(--brand-logo-bar-center-offset-ratio) * var(--brand-mark-height-em) * 1em));
    overflow-wrap: anywhere;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.75rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover { color: var(--text-primary); }

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

/* ─────────────────────────  Hero (compact)  ──────────────────────────────── */

.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: 8rem 2rem 3rem;
    position: relative;
    overflow: hidden;
}

.hero-compact {
    min-height: auto;
    padding: calc(var(--site-nav-height) + 2.5rem) 2rem 2rem;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 30%, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--accent);
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 999px;
    padding: 0.35rem 0.95rem;
    margin-bottom: 1.25rem;
}

.hero-title {
    font-family: "InterDisplay", "Inter", sans-serif;
    font-size: clamp(2rem, 4.4vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #ffffff 0%, #c0c0c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 1.6vw, 1.18rem);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

/* ─────────────────────────  Studio (form + preview)  ─────────────────────── */

.studio-section {
    padding: 1.5rem 0 4rem;
}

.studio-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.studio-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 2rem;
    min-width: 0;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.studio-card:hover {
    border-color: rgba(255, 255, 255, 0.18);
}

.studio-card__header {
    margin-bottom: 1.5rem;
}

.studio-card__title {
    font-family: "InterDisplay", "Inter", sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.studio-card__subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.55;
}

/* Type-toggle pills */
.type-toggle {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.type-pill {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.5rem 0.95rem;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.type-pill:hover {
    border-color: rgba(255, 255, 255, 0.25);
    color: var(--text-primary);
}

.type-pill.is-active {
    background: rgba(59, 130, 246, 0.18);
    border-color: rgba(59, 130, 246, 0.55);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
}

/* Form fields (DSC parity) */
.form-group { margin-bottom: 1.25rem; }

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.85rem;
    background: rgba(10, 10, 10, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}

.form-textarea {
    resize: vertical;
    min-height: 88px;
    font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
    font-size: 0.96rem;
    line-height: 1.5;
}

/* Suggestion banner */
.suggestion-banner {
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
    background: var(--warn-soft);
    border: 1px solid var(--warn-border);
    border-radius: 10px;
    padding: 0.95rem 1rem;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.suggestion-banner__icon {
    color: var(--warn);
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.suggestion-banner__body {
    flex: 1;
    min-width: 0;
}

.suggestion-banner__lead {
    font-size: 0.93rem;
    line-height: 1.5;
    margin-bottom: 0.6rem;
    overflow-wrap: anywhere;
}

.suggestion-banner__lead strong {
    color: var(--warn);
    font-weight: 600;
}

.suggestion-banner__actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Status row (encoded preview) */
.status-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    align-items: baseline;
    padding: 0.65rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 0.25rem;
}

.status-row__label {
    color: var(--text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

.status-row__value {
    color: var(--text-primary);
    background: transparent;
    border: 0;
    padding: 0;
    font-size: 0.92rem;
    overflow-wrap: anywhere;
    word-break: break-all;
    flex: 1 1 100%;
    min-width: 0;
}

/* Error row */
.error-row {
    background: var(--error-soft);
    border: 1px solid var(--error-border);
    color: var(--error);
    border-radius: 8px;
    padding: 0.7rem 0.85rem;
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

/* Advanced disclosure */
.advanced {
    margin-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.advanced > summary {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    list-style: none;
    user-select: none;
    padding: 0.25rem 0;
    transition: color 0.2s ease;
}

.advanced > summary::-webkit-details-marker { display: none; }
.advanced > summary::before {
    content: '▸';
    display: inline-block;
    margin-right: 0.45rem;
    transition: transform 0.2s ease;
}
.advanced[open] > summary::before { transform: rotate(90deg); }
.advanced > summary:hover { color: var(--text-primary); }

.advanced-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
    gap: 0.75rem;
    margin-top: 0.85rem;
}

.advanced-field { display: block; min-width: 0; }
.advanced-field__label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

/* QR stage */
.qr-stage {
    background: #ffffff;
    border-radius: 12px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    position: relative;
    overflow: hidden;
    transition: background 0.3s ease;
}

.qr-stage[data-state="empty"] {
    background: rgba(255, 255, 255, 0.03);
    border: 1px dashed var(--border-color);
}

.qr-stage[data-state="error"] {
    background: rgba(251, 113, 133, 0.05);
    border: 1px dashed var(--error-border);
}

.qr-stage[data-state="ready"] {
    background: #ffffff;
}

.qr-empty {
    color: var(--text-muted);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
}

.qr-empty p {
    font-size: 0.9rem;
}

#qr-canvas {
    display: block;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
}

/* Visibility of #qr-canvas / #qr-empty is toggled in JS via the `hidden`
 * attribute (see setStatus in app.js). The global `[hidden] !important` rule
 * handles the rest. */

/* Buttons (DSC parity) */
.btn {
    display: inline-block;
    padding: 0.85rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease, border-color 0.25s ease, color 0.25s ease;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
    line-height: 1.2;
}

.btn-small {
    padding: 0.5rem 0.95rem;
    font-size: 0.85rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(59, 130, 246, 0.28);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.download-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.download-row .btn { flex: 1 1 140px; }

.preview-fineprint {
    margin-top: 1rem;
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.55;
}

/* ─────────────────────────  Info section  ────────────────────────────────── */

.info-section {
    padding: 1.5rem 0 4rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 1.5rem;
    padding-top: 3rem;
    padding-bottom: 1rem;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.75rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.info-card:hover {
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.info-card__icon {
    font-size: 2.25rem;
    margin-bottom: 0.85rem;
    line-height: 1;
}

.info-card__title {
    font-family: "InterDisplay", "Inter", sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.55rem;
}

.info-card__body {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

.info-card__body code {
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.85em;
}

/* ─────────────────────────  Footer  ──────────────────────────────────────── */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2.25rem 0 1.5rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-brand-link {
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
    text-decoration: none;
    color: var(--text-primary);
}

.footer-logo-img {
    height: calc(var(--brand-mark-height-em) * 1em);
    width: auto;
    opacity: 0.9;
    vertical-align: middle;
    align-self: center;
}

.footer-brand-text {
    font-family: "InterDisplay", "Inter", sans-serif;
    font-weight: 700;
    font-size: 1em;
    line-height: 1.15;
    margin-left: -0.02em;
    transform: translateY(calc(var(--brand-logo-bar-center-offset-ratio) * var(--brand-mark-height-em) * 1em));
}

.footer-list {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.footer-list--inline { padding: 0; margin: 0; }

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    font-size: 0.92rem;
}

.footer-link:hover { color: var(--text-primary); }

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.83rem;
}

/* ─────────────────────────  Responsive  ──────────────────────────────────── */

@media (max-width: 968px) {
    .studio-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero-compact {
        padding: calc(var(--site-nav-height) + 1.25rem) 1.25rem 1.25rem;
    }

    .hero-title { font-size: clamp(1.8rem, 6.5vw, 2.5rem); }
    .hero-subtitle { font-size: 0.98rem; }

    .nav-container { padding: 0.85rem 1.25rem; }
    .nav-menu { gap: 1rem; }
    .nav-link { font-size: 0.85rem; }

    .container { padding: 0 1.25rem; }

    .studio-card { padding: 1.5rem; border-radius: 12px; }
    .studio-section { padding: 1rem 0 2.5rem; }
    .info-section { padding: 1rem 0 2.5rem; }
    .info-grid { padding-top: 2rem; }

    .download-row .btn { flex: 1 1 100%; }

    .footer-content { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .nav-logo-text { display: none; }
    .nav-container { padding: 0.85rem 1rem; }
    .container { padding: 0 1rem; }
    .hero-compact { padding: calc(var(--site-nav-height) + 0.75rem) 1rem 1rem; }
    .studio-card { padding: 1.25rem; }

    .type-toggle { gap: 0.4rem; }
    .type-pill { padding: 0.45rem 0.8rem; font-size: 0.8rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
    html { scroll-behavior: auto; }
}