/* Stats Page Styles */

.stats-container {
    max-width: 800px;
    margin: 60px auto 40px;
    padding: 1rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent);
}

.stats-header {
    text-align: center;
    margin-bottom: 2rem;
}

.stats-header__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stats-header__subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Login Required */
.stats-login-required {
    text-align: center;
    padding: 3rem 1rem;
    background: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid var(--card-border);
}

.stats-login-required__icon {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.stats-login-required h2 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stats-login-required p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.stats-login-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.stats-login-btn:hover {
    background: var(--accent-light);
}

/* Loading */
.stats-loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.stats-loading__spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--card-border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* Stats Sections */
.stats-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.stats-section__title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.stats-section__desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.stats-section--danger {
    border-color: #ef4444;
}

[data-theme="dark"] .stats-section--danger {
    border-color: #991b1b;
}

/* Overall Stats Grid */
.stats-overall {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (min-width: 600px) {
    .stats-overall {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stats-overall__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
    background: var(--body-bg);
    border-radius: 0.75rem;
}

.stats-overall__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-border);
    color: var(--text-secondary);
    border-radius: 50%;
    margin-bottom: 0.5rem;
}

.stats-overall__icon--accent {
    background: rgba(243, 14, 114, 0.15);
    color: var(--accent);
}

.stats-overall__icon--green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--green);
}

.stats-overall__icon--warning {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.stats-overall__value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}

.stats-overall__label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Form Stats Grid */
.stats-bars {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
}

/* Form Card */
.stats-form-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: var(--body-bg);
    border-radius: 0.75rem;
    border-left: 4px solid var(--green);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stats-form-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.stats-form-card__name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stats-form-card__value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--green);
}

.stats-form-card__attempts {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Color variants */
.stats-form-card--good {
    border-left-color: var(--green);
}

.stats-form-card--good .stats-form-card__value {
    color: var(--green);
}

.stats-form-card--medium {
    border-left-color: #f59e0b;
}

.stats-form-card--medium .stats-form-card__value {
    color: #f59e0b;
}

.stats-form-card--low {
    border-left-color: #ef4444;
}

.stats-form-card--low .stats-form-card__value {
    color: #ef4444;
}

/* Problem Verbs Grid */
.stats-problems {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
}

/* Problem Verb Card */
.stats-problem-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem 0.75rem;
    background: var(--body-bg);
    border-radius: 0.75rem;
    border-bottom: 3px solid #ef4444;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stats-problem-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.stats-problem-card__verb {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stats-problem-card__reading {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.stats-problem-card__form {
    font-size: 0.7rem;
    color: var(--text-secondary);
    background: var(--card-bg);
    padding: 0.15rem 0.5rem;
    border-radius: 0.25rem;
    margin-bottom: 0.35rem;
}

.stats-problem-card__accuracy {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ef4444;
}

/* Empty State */
.stats-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-muted);
    grid-column: 1 / -1;
}

.stats-empty svg {
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

.stats-empty p {
    margin: 0;
    font-size: 0.9rem;
}

.stats-practice-btn {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: background 0.2s;
}

.stats-practice-btn:hover {
    background: var(--accent-light);
}

/* SRS Section */
.stats-srs-info {
    text-align: center;
}

.stats-srs-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.stats-srs-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--green);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: background 0.2s;
}

.stats-srs-btn:hover {
    background: #059669;
}

/* Reset Button */
.stats-reset-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: #ef4444;
    border: 1px solid #ef4444;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.stats-reset-btn:hover {
    background: #ef4444;
    color: white;
}

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