/**
 * marsRocketWords Shared UI Components
 *
 * Common styles extracted from page-level inline <style> blocks.
 * All rules use CSS custom properties from themes.css / styles.css
 * so they work across all themes automatically.
 *
 * Components:
 *  - Centered page layout (.centered-page)
 *  - Page container / header / content (.page-container, .page-header, .page-content)
 *  - Form elements (.form-group, inputs, selects)
 *  - Buttons (.submit-btn, .btn, .btn-primary, .btn-secondary)
 *  - Feedback (.error-message, .success-message, .loading, .spinner)
 *  - Password requirements (.password-requirements)
 *  - Button group (.button-group)
 */

/* ============================================================================
   Centered Page Layout
   Used by standalone pages: login, setup, results, reset-password, game
   ============================================================================ */

.centered-page {
    display: block;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
}

.centered-page > .page-container {
    margin: 40px auto;
}

/* ============================================================================
   Page Container — the common card wrapper
   ============================================================================ */

.page-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    box-shadow: var(--box-shadow);
    max-width: 450px;
    width: 100%;
    overflow: hidden;
}

.page-container--wide {
    max-width: 700px;
}

/* ============================================================================
   Page Header — gradient banner at top of card
   ============================================================================ */

.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px 30px;
    text-align: center;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.page-header img {
    height: 50px;
    width: auto;
    display: block;
}

.page-header h1 {
    margin: 0;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -1px;
}

.page-header p {
    margin: 5px 0 0 0;
    font-size: 14px;
    opacity: 0.9;
}

/* ============================================================================
   Page Content — inner padding area
   ============================================================================ */

.page-content {
    padding: 40px 30px;
}

/* ============================================================================
   Form Elements
   ============================================================================ */

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    font-size: 16px;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    background: var(--input-bg-hover);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

/* ============================================================================
   Buttons
   ============================================================================ */

/* Full-width gradient submit button */
.submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

.submit-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Flexible button base */
.btn {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--overlay-light);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--overlay-lighter);
}

/* Button group — side-by-side buttons */
.button-group {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

/* ============================================================================
   Feedback: Error, Success, Loading, Spinner
   ============================================================================ */

.error-message {
    background: rgba(255, 0, 0, 0.1);
    color: var(--accent-danger);
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
}

.error-message.show {
    display: block;
}

.success-message {
    background: rgba(0, 255, 0, 0.1);
    color: var(--accent-success);
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
}

.success-message.show {
    display: block;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
    color: #667eea;
}

.loading.show {
    display: block;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-light);
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner--large {
    width: 30px;
    height: 30px;
    border-width: 4px;
    margin-bottom: 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================================================
   Password Requirements Box
   ============================================================================ */

.password-requirements {
    background: var(--overlay-light);
    border-left: 4px solid #ffc107;
    padding: 12px 15px;
    margin: 20px 0;
    font-size: 13px;
    color: var(--text-secondary);
    border-radius: 4px;
}

.password-requirements li {
    margin: 4px 0;
}

/* ============================================================================
   Profile Avatar — clickable profile picture link
   ============================================================================ */

.profile-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #667eea;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.profile-avatar:hover,
.profile-avatar:focus {
    opacity: 0.8;
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* ============================================================================
   Player Card — reusable inline player stats badge
   Used in game cards, leaderboard, results, etc.
   ============================================================================ */

.player-card {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--overlay-light);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 13px;
    margin-top: 8px;
}

.player-card-name {
    font-weight: 700;
    color: var(--text-primary);
}

.player-card-stats {
    display: flex;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
}

.player-card-stat {
    display: flex;
    align-items: center;
    gap: 3px;
}

.player-card-stat .stat-label {
    color: var(--text-muted);
}

.player-card-stat .stat-num {
    font-weight: 600;
    color: var(--text-secondary);
}

.player-card-stat .stat-num.wins { color: var(--accent-success); }
.player-card-stat .stat-num.losses { color: var(--accent-danger); }
.player-card-stat .stat-num.points { color: #667eea; }

/* ============================================================================
   Responsive — Mobile adjustments for shared components
   ============================================================================ */

@media (max-width: 600px) {
    .page-header h1 {
        font-size: 22px;
    }

    .page-content {
        padding: 25px 20px;
    }

    .button-group {
        flex-direction: column;
    }
}