/* ===================================================================
   Spot it! / Dobble Generator — Professional Stylesheet
   =================================================================== */

/* ===== CSS Variables & Reset ===== */
:root {
    --primary: #6366F1;
    --primary-light: #818CF8;
    --primary-dark: #4F46E5;
    --primary-glow: rgba(99, 102, 241, 0.15);
    --accent: #EC4899;
    --accent-dark: #DB2777;
    --accent-glow: rgba(236, 72, 153, 0.15);

    --bg-body: #0B0D13;
    --bg-surface: #12141D;
    --bg-card: #181B27;
    --bg-elevated: #1F2233;
    --bg-hover: #252840;

    --text-primary: #F1F2F6;
    --text-secondary: #9CA3C0;
    --text-tertiary: #656B8A;

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);

    --success: #22C55E;
    --warning: #F59E0B;
    --error: #EF4444;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 24px rgba(99, 102, 241, 0.12);

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Header ===== */
header {
    border-bottom: 1px solid var(--border-default);
    padding: 0 32px;
    height: 68px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(16px);
    background: rgba(11, 13, 19, 0.8);
}

.header-inner {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-left: 20px;
}

.logo-icon {
    font-size: 32px;
    color: var(--primary-light);
    filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.3));
}

header h1 {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.subtitle {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* ===== Language Toggle ===== */
.lang-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.lang-toggle:hover {
    border-color: var(--primary);
    background: var(--primary-glow);
    transform: scale(1.05);
}

.flag-icon {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}

/* ===== Main Layout ===== */
main {
    display: flex;
    gap: 28px;
    padding: 28px;
    max-width: 1600px;
    margin: 0 auto;
    min-height: calc(100vh - 68px);
}

/* ===== Sidebar ===== */
#sidebar {
    width: 340px;
    min-width: 340px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: border-color var(--transition-base);
}

.panel:hover {
    border-color: var(--border-strong);
}

.panel h2 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-icon {
    font-size: 18px;
    color: var(--primary-light);
}

/* ===== Variant Buttons ===== */
.variant-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.variant-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px 12px;
    cursor: pointer;
    color: var(--text-primary);
    text-align: center;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.variant-btn:hover {
    border-color: var(--primary);
    background: var(--primary-glow);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.variant-btn.active {
    border-color: var(--primary);
    background: var(--primary-glow);
    box-shadow: var(--shadow-glow), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.variant-name {
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.variant-info {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* ===== Clear All Button ===== */
.btn-clear-all {
    margin-left: auto;
    background: none;
    border: 1px solid var(--border-default);
    border-radius: 6px;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    line-height: 1;
}

.btn-clear-all span {
    font-size: 16px;
}

.btn-clear-all:hover {
    color: var(--error);
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* ===== Image Status ===== */
.image-status {
    font-size: 0.85rem;
    margin-bottom: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-card);
    border-radius: 2px;
    margin-top: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    transition: width var(--transition-slow);
}

.progress-fill.complete {
    background: var(--success);
}

/* ===== Buttons ===== */
.button-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
}

.btn-icon {
    font-size: 18px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 1px 3px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-strong);
}

.btn-accent {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-accent:active {
    transform: translateY(0);
}

.btn-accent:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    filter: grayscale(0.3);
}

.btn-large {
    padding: 14px 24px;
    margin-bottom: 10px;
    font-size: 0.9rem;
    width: 100%;
    border-radius: var(--radius-md);
}

.generate-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin: -4px 0 8px;
    opacity: 0.8;
}

/* ===== Image Gallery ===== */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
    gap: 5px;
    max-height: 190px;
    overflow-y: auto;
    padding-right: 4px;
}

.image-gallery::-webkit-scrollbar {
    width: 3px;
}

.image-gallery::-webkit-scrollbar-track {
    background: transparent;
}

.image-gallery::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 2px;
}

.gallery-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    transition: border-color var(--transition-fast);
}

.gallery-thumb:hover {
    border-color: var(--primary);
}

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

.gallery-thumb .thumb-index {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.75);
    font-size: 0.55rem;
    text-align: center;
    padding: 1px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.gallery-thumb .thumb-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--error);
    color: white;
    font-size: 10px;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: background var(--transition-fast);
}

.gallery-thumb:hover .thumb-remove {
    display: flex;
}

.gallery-thumb .thumb-remove:hover {
    background: #DC2626;
}

/* ===== Card Preview ===== */
#card-preview {
    flex: 1;
    min-width: 0;
}

.placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 460px;
    background: var(--bg-surface);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-xl);
    text-align: center;
    padding: 48px 40px;
}

.placeholder h2 {
    margin-bottom: 8px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.placeholder-steps {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.step {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--primary-glow);
    border: 1px solid var(--primary);
    color: var(--primary-light);
    font-size: 0.75rem;
    font-weight: 700;
}

/* ===== Cards Container ===== */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

/* ===== Individual Card ===== */
.dobble-card {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 300px;
    margin: 0 auto;
}

.dobble-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: white;
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--border-default);
    overflow: hidden;
}

.dobble-card .card-number {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 12px;
    border-radius: 10px;
    z-index: 10;
    letter-spacing: 0.03em;
}

.card-symbol {
    position: absolute;
    transform-origin: center center;
}

.card-symbol img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
}

.card-symbol.round img {
    border-radius: 50%;
}

/* ===== Checkbox Options ===== */
.checkbox-option {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 7px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    user-select: none;
    transition: color var(--transition-fast);
}

.checkbox-option:hover {
    color: var(--text-primary);
}

.checkbox-option input[type="checkbox"] {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-strong);
    border-radius: 4px;
    cursor: pointer;
    flex-shrink: 0;
    position: relative;
    transition: all var(--transition-fast);
    background: var(--bg-card);
}

.checkbox-option input[type="checkbox"]:checked {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-option input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-option input[type="checkbox"]:hover {
    border-color: var(--primary-light);
}

/* ===== Print Area ===== */
.print-area {
    display: none;
}

/* ===== Loading Spinner ===== */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

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

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: 28px;
    right: 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: toastIn var(--transition-base) ease;
    max-width: 360px;
    backdrop-filter: blur(12px);
}

.toast.success {
    border-left: 3px solid var(--success);
}

.toast.error {
    border-left: 3px solid var(--error);
}

.toast.info {
    border-left: 3px solid var(--primary);
}

@keyframes toastIn {
    from {
        transform: translateY(16px) scale(0.96);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    main {
        flex-direction: column;
        padding: 16px;
    }

    #card-preview {
        order: -1;
    }

    #card-preview.generated {
        order: 1;
    }

    #sidebar {
        width: 100%;
        min-width: unset;
    }

    .cards-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    header {
        height: 60px;
        padding: 0 16px;
    }

    header h1 {
        font-size: 1.1rem;
    }
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1rem;
    }

    .subtitle {
        display: none;
    }

    main {
        padding: 12px;
        gap: 12px;
    }

    #sidebar {
        gap: 8px;
    }

    .panel {
        padding: 16px;
    }

    .variant-grid {
        grid-template-columns: 1fr 1fr;
    }

    .cards-container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 12px;
    }

    .placeholder {
        min-height: 300px;
        padding: 32px 20px;
    }

    .placeholder h2 {
        font-size: 1.1rem;
    }
}

/* ===== Footer ===== */
footer {
    text-align: center;
    padding: 24px 28px;
    color: var(--text-muted);
    font-size: 0.78rem;
    line-height: 1.6;
    border-top: 1px solid var(--border);
    margin-top: 12px;
}

footer p {
    margin: 0;
}

footer strong {
    color: var(--text-secondary);
    font-weight: 600;
}