:root {
    --bg-color: #222222;
    --card-bg: #333333;
    --surface-color: #404040;
    --surface-hover: #4d4d4d;
    --primary-color: #3b82f6;
    --text-primary: #ffffff;
    --text-secondary: #e5e5e5;
    --border-color: #555555;
    --success-color: #22c55e;
    --glass-bg: #222222;
    --glass-border: #555555;

    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.5;
}

#app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(to right, #60a5fa, #34d399);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.header-title {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.app-logo {
    max-height: 120px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
}

.path-icon {
    color: #4cd964;
    /* Logo Green */
    margin-right: 0.5rem;
}

/* Removed old title styles as they are replaced by logo */
/* .header-title h1, .subtitle ... */

.lang-toggle-btn {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    transition: background-color 0.2s, transform 0.1s;
}

.lang-toggle-btn:hover {
    background-color: var(--surface-color);
    transform: scale(1.04);
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
    background-color: var(--card-bg);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    max-width: 800px;
    margin: 0 auto;
}

.file-help {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: left;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.help-label {
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.help-method {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem;
    border-radius: 4px;
    text-align: center;
}

.help-paths {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.path-item {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-family: monospace;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.path-item code {
    color: var(--accent-color);
    word-break: break-all;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-color);
    background-color: rgba(59, 130, 246, 0.05);
}

.upload-content .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-content h2 {
    margin-bottom: 0.5rem;
}

.upload-content p {
    color: var(--text-secondary);
}

/* Dashboard */
.hidden {
    display: none !important;
}

.dashboard-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    background-color: var(--glass-bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.stats-bar {
    display: flex;
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.filter-controls {
    display: flex;
    gap: 0.5rem;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 0.25rem;
    border-radius: 8px;
}

.filter-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.filter-btn:hover {
    color: var(--text-primary);
}

.filter-btn.active {
    background-color: var(--card-bg);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Navigation */
.category-nav {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
}

.category-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}

.category-btn:hover {
    border-color: var(--accent-color);
    color: var(--text-primary);
}

.category-btn.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

/* Advancements Grid */
.advancements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.advancement-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.advancement-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    border-color: var(--accent-color);
}

.advancement-card.completed {
    border-color: var(--success-color);
    background: linear-gradient(to bottom right, rgba(16, 185, 129, 0.05), transparent);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.advancement-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.advancement-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.fraction-display {
    display: inline-block;
    background-color: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    font-size: 0.8rem;
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.25rem;
    font-weight: 600;
}

.status-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.advancement-card.completed .status-badge {
    background-color: rgba(52, 211, 153, 0.2);
    color: #34d399;
}

/* Footer & Donation */
.main-footer {
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.donation-description {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.email-note {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.8em;
    opacity: 0.8;
    font-family: monospace;
}

.donation-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(to right, #f59e0b, #ec4899);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.donation-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.developer-credit {
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.8;
    font-weight: 500;
}

/* Criteria List */
.criteria-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.criteria-item {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background-color: rgba(0, 0, 0, 0.3);
    color: var(--text-secondary);
}

.criteria-item.done {
    color: var(--success-color);
    background-color: rgba(16, 185, 129, 0.1);
}

.criteria-item.done::before {
    content: "○";
    color: var(--success-color);
}

.criteria-item.missing {
    color: var(--text-secondary);
}