/* ==========================================================================
   Fidelity Card Store — Dark Theme
   Mobile-first responsive layout, 320px–1920px
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-card: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent: #bb86fc;
    --accent-hover: #d4a5ff;
    --error: #cf6679;
    --success: #03dac6;
    --border: #333333;
    --input-bg: #2c2c2c;
    --shadow: rgba(0, 0, 0, 0.3);
    --radius: 8px;
    --min-touch: 44px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100dvh;
    overflow-x: hidden;
}

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

a:hover,
a:focus-visible {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ---------- Navigation ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 4px var(--shadow);
    overflow-x: auto;
    white-space: nowrap;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    min-height: var(--min-touch);
    min-width: var(--min-touch);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-weight: 500;
    transition: background-color 0.15s;
}

.nav-link:hover,
.nav-link:focus-visible {
    background-color: var(--bg-card);
}

.nav-add {
    background-color: var(--accent);
    color: #121212;
    font-weight: 600;
}

.nav-add:hover,
.nav-add:focus-visible {
    background-color: var(--accent-hover);
    color: #121212;
}

.nav-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.lang-toggle {
    display: inline-flex;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius);
    cursor: pointer;
    min-height: var(--min-touch);
    min-width: var(--min-touch);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.15s, color 0.15s;
}

.lang-btn:hover,
.lang-btn:focus-visible {
    border-color: var(--accent);
    color: var(--accent);
}

.logout-form {
    display: inline-flex;
}

.logout-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
}

.logout-btn:hover,
.logout-btn:focus-visible {
    color: var(--error);
    background-color: transparent;
}

.nav-user {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.4rem 0.5rem;
    white-space: nowrap;
}

/* ---------- Main Content ---------- */
.content {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--min-touch);
    min-width: var(--min-touch);
    padding: 0.65rem 1.25rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    background-color: var(--accent);
    color: #121212;
    text-decoration: none;
    transition: background-color 0.15s, transform 0.1s;
    -webkit-tap-highlight-color: transparent;
}

.btn:hover,
.btn:focus-visible {
    background-color: var(--accent-hover);
    color: #121212;
}

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

.btn-primary {
    background-color: var(--accent);
    color: #121212;
}

.btn-secondary {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
    background-color: var(--border);
    color: var(--text-primary);
}

.btn-danger {
    background-color: var(--error);
    color: #fff;
}

.btn-danger:hover,
.btn-danger:focus-visible {
    background-color: #e57373;
}

.btn-toggle {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    margin-top: 0.75rem;
}

.btn-toggle:hover,
.btn-toggle:focus-visible {
    border-color: var(--accent);
    color: var(--accent);
}

/* ---------- Login ---------- */
.login-container {
    max-width: 380px;
    margin: 3rem auto;
    padding: 2rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px var(--shadow);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-form .btn {
    margin-top: 0.5rem;
    width: 100%;
}

/* ---------- Forms ---------- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="search"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 0.85rem;
    font-size: 1rem;
    color: var(--text-primary);
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.15s;
    min-height: var(--min-touch);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input[type="file"] {
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    min-height: var(--min-touch);
}

.form-group input[type="file"]::file-selector-button {
    padding: 0.5rem 1rem;
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.85rem;
    margin-right: 0.75rem;
    min-height: var(--min-touch);
}

.form-group input[type="file"]::file-selector-button:hover {
    border-color: var(--accent);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0a0' viewBox='0 0 16 16'%3E%3Cpath d='M8 10.5L2.5 5h11L8 10.5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

.field-error {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.82rem;
    color: var(--error);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    min-height: var(--min-touch);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* ---------- Messages / Alerts ---------- */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-info {
    background-color: rgba(3, 218, 198, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.error-message {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    background-color: rgba(207, 102, 121, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    font-size: 0.9rem;
}

.success-message {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    background-color: rgba(3, 218, 198, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
    font-size: 0.9rem;
}

.warning {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    background-color: rgba(255, 183, 77, 0.1);
    border: 1px solid #ffb74d;
    color: #ffb74d;
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

/* ---------- Error Page ---------- */
.error-container {
    text-align: center;
    padding: 3rem 1rem;
}

.error-container h1 {
    margin-bottom: 1rem;
}

.error-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* ---------- Search ---------- */
.search-container {
    margin-bottom: 1rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    color: var(--text-primary);
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    outline: none;
    min-height: var(--min-touch);
    transition: border-color 0.15s;
}

.search-input:focus {
    border-color: var(--accent);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

/* ---------- Card Grid ---------- */
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.card-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color 0.15s, box-shadow 0.15s;
    min-height: var(--min-touch);
}

.card-item:hover,
.card-item:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 2px 8px var(--shadow);
    color: var(--text-primary);
}

.card-thumbnail {
    width: 56px;
    height: 56px;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.card-placeholder {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.card-store-name {
    font-weight: 500;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-barcode-format {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ---------- Empty State ---------- */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state p {
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

/* ---------- Lightbox (full-screen image viewer) ---------- */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.lightbox img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    touch-action: pinch-zoom;
    border-radius: var(--radius);
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 2.5rem;
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.zoomable {
    cursor: pointer;
}

/* ---------- Barcode Display ---------- */
.barcode-image {
    display: block;
    max-width: 100%;
    margin: 0 auto 1rem;
    border-radius: var(--radius);
    background-color: #fff;
    padding: 1rem;
}

.barcode-number {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    padding: 2rem 1rem;
    letter-spacing: 0.1em;
    word-break: break-all;
    color: var(--text-primary);
    background-color: var(--bg-card);
    border-radius: var(--radius);
}

/* ---------- Hint Text ---------- */
.hint {
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-align: center;
    font-style: italic;
}

/* ---------- Card Detail Sections ---------- */
.card-section {
    margin-bottom: 1.5rem;
}

/* ---------- Card Detail Actions ---------- */
.card-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.card-actions form {
    display: inline-flex;
}

/* ---------- Photo Display ---------- */
.card-photo {
    display: block;
    max-width: 100%;
    margin: 0 auto;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px var(--shadow);
}

.photo-preview {
    max-width: 120px;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border);
}

.current-photo {
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    background-color: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* ---------- Scanner Container ---------- */
#scanner-container {
    margin-top: 0.75rem;
    border-radius: var(--radius);
    overflow: hidden;
    background-color: #000;
}

#scanner-container video {
    width: 100%;
    display: block;
}

#scanner-container .scanner-active {
    padding: 0.5rem;
}

.scanner-error {
    padding: 0.75rem;
    color: var(--error);
    font-size: 0.85rem;
    text-align: center;
}

/* ---------- Extraction Message ---------- */
.extraction-message {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.extraction-success {
    background-color: rgba(3, 218, 198, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.extraction-failed {
    background-color: rgba(207, 102, 121, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

/* ---------- Responsive: Tablet (≥600px) ---------- */
@media (min-width: 600px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .content {
        padding: 1.5rem;
    }
}

/* ---------- Responsive: Desktop (≥900px) ---------- */
@media (min-width: 900px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .content {
        padding: 2rem;
    }
}

/* ---------- Large touch targets on mobile (≤768px) ---------- */
@media (max-width: 768px) {
    .btn,
    .nav-link,
    .tab-btn,
    .lang-btn,
    .logout-btn,
    .card-item,
    .search-input,
    .checkbox-label {
        min-height: var(--min-touch);
    }

    .form-group input[type="text"],
    .form-group input[type="password"],
    .form-group input[type="search"],
    .form-group select,
    .form-group textarea {
        min-height: var(--min-touch);
        font-size: 16px; /* prevent zoom on iOS */
    }
}

/* ---------- Small screens (≤360px) ---------- */
@media (max-width: 360px) {
    .content {
        padding: 0.75rem;
    }

    .navbar {
        padding: 0.5rem;
        gap: 0.25rem;
    }

    .nav-link {
        padding: 0.4rem 0.5rem;
        font-size: 0.85rem;
    }

    .login-container {
        margin: 1.5rem 0.5rem;
        padding: 1.5rem;
    }
}

/* ---------- Camera Capture Overlay ---------- */
.camera-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background-color: #000;
    display: flex;
    flex-direction: column;
}

.camera-video-container {
    position: relative;
    flex: 1;
    overflow: hidden;
}

.camera-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.camera-guide-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    /* Semi-transparent overlay using box-shadow on the guide */
}

.camera-guide {
    width: 80vw;
    max-width: 400px;
    aspect-ratio: 1.586 / 1;
    border: 3px solid rgba(255, 255, 255, 0.85);
    border-radius: 12px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.55);
}

.camera-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 1.25rem 1rem;
    background-color: rgba(0, 0, 0, 0.85);
    flex-shrink: 0;
}

.camera-capture-btn {
    min-width: 120px;
    font-size: 1.1rem;
    padding: 0.75rem 1.5rem;
}

.camera-cancel-btn {
    min-width: 100px;
}

/* ---------- Camera Button ---------- */
.btn-camera {
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
}

/* ---------- Photo Capture Preview ---------- */
.photo-capture-preview {
    margin-top: 0.5rem;
}

.photo-capture-preview .photo-capture-thumbnail {
    max-width: 200px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 0.4rem;
}

.photo-capture-preview .camera-retake-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.75rem;
    min-height: 36px;
}

/* ---------- Accessibility: Focus visible ---------- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

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

/* ---------- Tag Bar (homepage filter) ---------- */
.tag-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0.75rem 0;
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: 999px;
    background-color: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    text-decoration: none;
    transition: border-color 0.15s, color 0.15s, background-color 0.15s;
    white-space: nowrap;
    min-height: 34px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.tag-pill:hover,
.tag-pill:focus-visible {
    border-color: var(--accent);
    color: var(--accent);
}

.tag-pill--active {
    background-color: var(--accent);
    color: #121212;
    border-color: var(--accent);
    font-weight: 600;
}

.tag-pill--active:hover,
.tag-pill--active:focus-visible {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #121212;
}

/* ---------- Tag Badges (card thumbnail) ---------- */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: 0.2rem;
}

.tag-badge {
    display: inline-block;
    padding: 0.1rem 0.45rem;
    font-size: 0.65rem;
    font-weight: 500;
    border-radius: 999px;
    background-color: rgba(187, 134, 252, 0.15);
    color: var(--accent);
    border: 1px solid rgba(187, 134, 252, 0.3);
    white-space: nowrap;
}

/* ---------- Tag Badges (detail page) ---------- */
.card-tags-detail {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.5rem;
}

/* ---------- Tag Chip Input (form) ---------- */
.tag-input-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    min-height: var(--min-touch);
    cursor: text;
    transition: border-color 0.15s;
}

.tag-input-container:focus-within {
    border-color: var(--accent);
}

.tag-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 999px;
    background-color: var(--accent);
    color: #121212;
}

.tag-chip-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    font-size: 0.85rem;
    line-height: 1;
    background: rgba(0, 0, 0, 0.2);
    border: none;
    border-radius: 50%;
    color: #121212;
    cursor: pointer;
    padding: 0;
}

.tag-chip-remove:hover {
    background: rgba(0, 0, 0, 0.4);
}

.tag-text-input {
    flex: 1;
    min-width: 80px;
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.9rem;
    padding: 0.25rem 0;
}

.tag-text-input::placeholder {
    color: var(--text-secondary);
}