/* ============================================
   WordRise Enhanced - Elegant Paper Theme
   ============================================ */

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

:root {
    /* Paper Theme Colors */
    --paper-white: #fdfcf9;
    --paper-cream: #f8f6f1;
    --paper-beige: #ebe8df;
    --warm-gray: #9e9589;
    --dark-gray: #4a4741;
    --accent-blue: #5a7a99;
    --accent-blue-light: #7b9ab8;
    --accent-gold: #d4a574;
    --text-primary: #3d3835;
    --text-secondary: #6a6560;
    --border-light: #d9d5cc;
    --shadow-soft: rgba(62, 56, 48, 0.08);
    --shadow-medium: rgba(62, 56, 48, 0.12);
    
    /* Paper texture */
    --paper-texture: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(0,0,0,0.01) 2px,
            rgba(0,0,0,0.01) 4px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0,0,0,0.01) 2px,
            rgba(0,0,0,0.01) 4px
        );
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    background: var(--paper-cream);
    background-image: var(--paper-texture);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* ============================================
   Common Button Styles
   ============================================ */

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 2px 6px var(--shadow-soft);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--accent-blue);
    color: var(--paper-white);
    border: 1px solid rgba(0,0,0,0.05);
}

.btn-primary:hover {
    background: var(--accent-blue-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.btn-secondary {
    background: var(--paper-white);
    color: var(--accent-blue);
    border: 1.5px solid var(--accent-blue);
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--paper-white);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.btn-danger {
    background: #b85450;
    color: var(--paper-white);
    border: 1px solid rgba(0,0,0,0.05);
}

.btn-danger:hover {
    background: #9e4440;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
    font-weight: 700;
}

/* ============================================
   Authentication Page
   ============================================ */

.auth-page {
    min-height: 100vh;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    max-width: 440px;
    width: 100%;
    margin: 0 auto;
    padding: 40px 35px;
    background: var(--paper-white);
    background-image: var(--paper-texture);
    border-radius: 8px;
    box-shadow: 
        0 2px 8px var(--shadow-soft),
        0 8px 24px var(--shadow-medium);
    border: 1px solid var(--border-light);
}

.auth-container .logo {
    text-align: center;
    margin-bottom: 35px;
}

.auth-container .logo h1 {
    font-size: 32px;
    color: var(--text-primary);
    margin-top: 12px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.auth-form h2 {
    color: var(--text-primary);
    margin-bottom: 25px;
    font-size: 24px;
    font-weight: 600;
}

.auth-form input {
    width: 100%;
    padding: 14px 16px;
    margin: 12px 0;
    border: 1.5px solid var(--border-light);
    border-radius: 6px;
    font-size: 15px;
    background: var(--paper-cream);
    color: var(--text-primary);
    transition: all 0.25s;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: var(--paper-white);
    box-shadow: 0 0 0 3px rgba(90, 122, 153, 0.1);
}

.auth-form button {
    width: 100%;
    padding: 15px;
    margin-top: 20px;
}

.auth-form p {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.auth-form a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
}

.auth-form a:hover {
    text-decoration: underline;
}

/* ============================================
   Landing Page
   ============================================ */

.landing-page {
    min-height: 100vh;
    padding: 20px;
}

.landing-container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--paper-white);
    background-image: var(--paper-texture);
    border-radius: 10px;
    padding: 35px;
    box-shadow: 
        0 2px 8px var(--shadow-soft),
        0 8px 24px var(--shadow-medium);
    border: 1px solid var(--border-light);
}

.landing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 25px;
    border-bottom: 2px solid var(--paper-beige);
    margin-bottom: 35px;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 26px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.token-display {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-light) 100%);
    color: var(--paper-white);
    padding: 10px 20px;
    border-radius: 25px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 
        0 2px 8px rgba(90, 122, 153, 0.2),
        inset 0 1px 0 rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.15);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.landing-main {
    text-align: center;
    padding: 30px 0;
}

.hero-title {
    color: var(--text-primary);
    font-size: 40px;
    margin-bottom: 35px;
    font-weight: 600;
    letter-spacing: -1px;
}

/* ============================================
   Difficulty Selector
   ============================================ */

.difficulty-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    margin: 30px 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.difficulty-btn {
    padding: 20px 16px;
    border: 2px solid var(--border-light);
    background: var(--paper-cream);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 2px 6px var(--shadow-soft);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.difficulty-btn:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
    background: var(--paper-white);
}

.difficulty-btn.selected {
    background: var(--accent-blue);
    color: var(--paper-white);
    border-color: var(--accent-blue);
    box-shadow: 0 4px 12px rgba(90, 122, 153, 0.25);
}

.difficulty-btn svg {
    margin-bottom: 8px;
}

.difficulty-btn div:first-child {
    font-weight: 600;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.difficulty-btn div:last-child {
    font-size: 13px;
    margin-top: 6px;
    opacity: 0.85;
}

/* ============================================
   Features Grid
   ============================================ */

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin-top: 50px;
}

.feature {
    background: var(--paper-cream);
    background-image: var(--paper-texture);
    padding: 30px 25px;
    border-radius: 8px;
    border: 1.5px solid var(--border-light);
    transition: all 0.25s ease;
    text-align: center;
}

.feature:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--shadow-medium);
    border-color: var(--accent-blue);
    background: var(--paper-white);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
}

.feature p {
    color: var(--text-secondary);
    font-size: 15px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ============================================
   Game Page
   ============================================ */

.game-page {
    min-height: 100vh;
    padding: 15px;
}

.game-container {
    max-width: 720px;
    margin: 0 auto;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    background: var(--paper-white);
    background-image: var(--paper-texture);
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-light);
}

.game-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-primary);
    transition: color 0.25s;
}

.game-logo:hover {
    color: var(--accent-blue);
}

.game-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    background: var(--paper-white);
    background-image: var(--paper-texture);
    padding: 18px;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-light);
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-blue);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ============================================
   Tower Display
   ============================================ */

.tower-container {
    background: var(--paper-white);
    background-image: var(--paper-texture);
    border-radius: 8px;
    padding: 30px 20px;
    margin-bottom: 15px;
    min-height: 200px;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.word-tower {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.tower-word {
    padding: 14px 28px;
    background: var(--paper-cream);
    color: var(--text-primary);
    border: 2px solid var(--accent-blue);
    border-radius: 6px;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 3px;
    animation: slideIn 0.3s ease-out;
    box-shadow: 0 2px 8px var(--shadow-soft);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============================================
   Current Letters
   ============================================ */

.current-letters-container {
    background: var(--paper-white);
    background-image: var(--paper-texture);
    padding: 18px 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-light);
}

.current-letters-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.current-letters {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.letter-tile {
    padding: 10px 16px;
    background: var(--paper-cream);
    border: 2px solid var(--accent-blue);
    border-radius: 6px;
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-blue);
    box-shadow: 0 1px 4px var(--shadow-soft);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ============================================
   Input Container
   ============================================ */

.input-container {
    background: var(--paper-white);
    background-image: var(--paper-texture);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-light);
}

.input-wrapper {
    display: flex;
    gap: 12px;
}

#word-input {
    flex: 1;
    padding: 15px 18px;
    border: 2px solid var(--border-light);
    border-radius: 6px;
    font-size: 18px;
    background: var(--paper-cream);
    color: var(--text-primary);
    transition: all 0.25s;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

#word-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: var(--paper-white);
    box-shadow: 0 0 0 3px rgba(90, 122, 153, 0.1);
}

.btn-submit {
    padding: 15px 32px;
    white-space: nowrap;
}

.message {
    margin-top: 12px;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.message.success {
    background: #d5e8d4;
    color: #2e5c20;
    border: 1px solid #a8c9a0;
}

.message.error {
    background: #f4d9d9;
    color: #7a2828;
    border: 1px solid #e0b4b4;
}

/* ============================================
   Powerups Grid
   ============================================ */

.powerup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 15px 0;
}

.powerup-card {
    background: var(--paper-white);
    background-image: var(--paper-texture);
    padding: 18px 12px;
    border-radius: 8px;
    border: 2px solid var(--border-light);
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 2px 6px var(--shadow-soft);
}

.powerup-card:hover:not(.disabled) {
    border-color: var(--accent-blue);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px var(--shadow-medium);
    background: var(--paper-cream);
}

.powerup-card.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--paper-beige);
}

.powerup-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.powerup-card strong {
    display: block;
    font-size: 15px;
    margin-bottom: 4px;
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.powerup-card > div[style*="font-size: 12px"] {
    color: var(--text-secondary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.powerup-cost {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #c99960 100%);
    color: var(--paper-white);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-top: 10px;
    box-shadow: 0 2px 6px rgba(212, 165, 116, 0.3);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ============================================
   Actions
   ============================================ */

.actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.btn-icon {
    padding: 13px 26px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ============================================
   Modal
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(61, 56, 53, 0.6);
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: var(--paper-white);
    background-image: var(--paper-texture);
    padding: 32px;
    border-radius: 10px;
    max-width: 520px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 
        0 4px 12px var(--shadow-soft),
        0 12px 32px var(--shadow-medium);
    border: 1px solid var(--border-light);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 18px;
    border-bottom: 2px solid var(--paper-beige);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 26px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    color: var(--warm-gray);
    transition: color 0.25s;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-footer {
    display: flex;
    gap: 12px;
    margin-top: 25px;
    padding-top: 18px;
    border-top: 2px solid var(--paper-beige);
    justify-content: flex-end;
    flex-wrap: wrap;
}

/* ============================================
   Stats Panel
   ============================================ */

.stats-panel {
    background: var(--paper-cream);
    background-image: var(--paper-texture);
    padding: 22px;
    border-radius: 8px;
    margin: 18px 0;
    border: 1px solid var(--border-light);
    box-shadow: 0 2px 6px var(--shadow-soft);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-light);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-row strong {
    color: var(--text-primary);
}

.stat-row span:last-child {
    color: var(--accent-blue);
    font-weight: 600;
}

/* ============================================
   Results
   ============================================ */

.final-score {
    text-align: center;
    padding: 30px 20px;
    background: var(--paper-cream);
    background-image: var(--paper-texture);
    border-radius: 8px;
    margin-bottom: 25px;
    border: 1px solid var(--border-light);
}

.score-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.score-number {
    font-size: 56px;
    font-weight: 700;
    color: var(--accent-blue);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.results-stats {
    display: grid;
    gap: 15px;
    margin: 20px 0;
}

.result-stat {
    display: flex;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--paper-cream);
    border-radius: 6px;
    border: 1px solid var(--border-light);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.result-stat span:first-child {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-stat span:last-child {
    font-weight: 700;
    color: var(--accent-blue);
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
    display: none !important;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    body {
        font-size: 15px;
    }
    
    .landing-container {
        padding: 25px 20px;
    }
    
    .landing-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .hero-title {
        font-size: 30px;
        margin-bottom: 25px;
    }
    
    .difficulty-selector {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .difficulty-btn {
        padding: 16px 14px;
    }
    
    .btn-large {
        padding: 16px 36px;
        font-size: 17px;
        width: 100%;
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    
    .game-header {
        padding: 15px 18px;
    }
    
    .game-logo {
        font-size: 20px;
    }
    
    .game-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 15px 12px;
    }
    
    .stat-label {
        font-size: 10px;
    }
    
    .stat-value {
        font-size: 22px;
    }
    
    .tower-word {
        font-size: 22px;
        padding: 12px 22px;
        letter-spacing: 2px;
    }
    
    .letter-tile {
        padding: 8px 14px;
        font-size: 18px;
    }
    
    .input-wrapper {
        flex-direction: column;
    }
    
    .btn-submit {
        width: 100%;
        padding: 15px;
    }
    
    #word-input {
        font-size: 16px;
    }
    
    .powerup-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }
    
    .powerup-card {
        padding: 15px 8px;
    }
    
    .powerup-icon {
        width: 32px;
        height: 32px;
    }
    
    .powerup-card strong {
        font-size: 13px;
    }
    
    .powerup-cost {
        font-size: 12px;
        padding: 5px 10px;
    }
    
    .modal-content {
        padding: 25px 20px;
        max-width: 100%;
    }
    
    .modal-header h3 {
        font-size: 22px;
    }
    
    .score-number {
        font-size: 48px;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
    
    .auth-container {
        padding: 30px 25px;
    }
}

@media (max-width: 480px) {
    .game-page {
        padding: 10px;
    }
    
    .hero-title {
        font-size: 26px;
    }
    
    .tower-word {
        font-size: 20px;
        padding: 10px 18px;
    }
    
    .powerup-grid {
        grid-template-columns: 1fr;
    }
    
    .powerup-card {
        padding: 16px 12px;
    }
}