:root {
    --primary-bg: #2c1810;
    --secondary-bg: #f4e8d8;
    --card-bg: #f9f3e8;
    --parchment: #f4e8d8;
    --ink: #3a2817;
    --accent-color: #8b3a3a;
    --accent-silver: #b89968;
    --text-primary: #3a2817;
    --text-secondary: #6b5a47;
    --border-color: #b89968;
    --hover-border: #8b3a3a;
}

/* Dark Mode Theme - Aged Leather & Dark Parchment */
body.dark-mode {
    --primary-bg: #0f0a08;
    --secondary-bg: #1a1410;
    --card-bg: #221a14;
    --parchment: #2a2218;
    --ink: #e8dcc8;
    --accent-color: #d4937c;
    --accent-silver: #c9a76f;
    --text-primary: #e8dcc8;
    --text-secondary: #b89968;
    --border-color: #6b5535;
    --hover-border: #d4937c;
}

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

body {
    font-family: 'Crimson Text', 'Garamond', 'Georgia', serif;
    background: linear-gradient(135deg, #2c1810 0%, #1a0f0a 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.8;
    transition: background 0.3s ease, color 0.3s ease;
}

body.dark-mode {
    background: linear-gradient(135deg, #0a0605 0%, #000000 100%);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,.03) 2px, rgba(0,0,0,.03) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,.03) 2px, rgba(0,0,0,.03) 4px);
    pointer-events: none;
    z-index: -1;
    transition: opacity 0.3s ease;
}

body.dark-mode::before {
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,.02) 2px, rgba(255,255,255,.02) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(255,255,255,.02) 2px, rgba(255,255,255,.02) 4px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 60px 20px 40px;
    background: linear-gradient(135deg, #f4e8d8 0%, #e8dcc8 100%);
    margin-bottom: 40px;
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    border: 3px solid #8b6f47;
    position: relative;
    transition: all 0.3s ease;
    padding-top: 80px;
}

body.dark-mode header {
    background: linear-gradient(135deg, #2a2218 0%, #1a1410 100%);
    border-color: var(--border-color);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(139, 111, 71, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 58, 58, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

body.dark-mode header::before {
    background: 
        radial-gradient(circle at 20% 30%, rgba(201, 167, 111, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(212, 147, 124, 0.05) 0%, transparent 50%);
}

header h1 {
    font-size: 3.5rem;
    color: var(--ink);
    margin-bottom: 15px;
    font-family: 'Cinzel', 'Georgia', serif;
    font-weight: 700;
    letter-spacing: 3px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

/* Dark Mode Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: linear-gradient(135deg, var(--border-color) 0%, var(--accent-color) 100%);
    border: 2px solid var(--border-color);
    color: var(--parchment);
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Cinzel', 'Georgia', serif;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.theme-toggle-icon {
    font-size: 1.2rem;
}

body.dark-mode .theme-toggle {
    background: linear-gradient(135deg, var(--accent-silver) 0%, var(--accent-color) 100%);
}

header p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    font-weight: 400;
    font-style: italic;
    position: relative;
    z-index: 1;
}

.crafting-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.craft-card {
    background: linear-gradient(135deg, #f9f3e8 0%, #f4e8d8 100%);
    padding: 30px;
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    border: 3px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: block;
}

body.dark-mode .craft-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--parchment) 100%);
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.craft-card::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border: 1px solid rgba(139, 111, 71, 0.2);
    pointer-events: none;
}

body.dark-mode .craft-card::before {
    border: 1px solid rgba(201, 167, 111, 0.2);
}

.craft-card:hover {
    border-color: var(--hover-border);
    box-shadow: 
        0 6px 20px rgba(139, 58, 58, 0.4),
        0 0 30px rgba(139, 58, 58, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
}

body.dark-mode .craft-card:hover {
    box-shadow: 
        0 6px 20px rgba(212, 147, 124, 0.5),
        0 0 30px rgba(212, 147, 124, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.craft-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.craft-icon img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    filter: sepia(0.3) brightness(0.9) drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.craft-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 15px;
    text-align: center;
    font-family: 'Cinzel', 'Georgia', serif;
    letter-spacing: 1px;
}

.craft-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: center;
    margin-bottom: 20px;
}

.craft-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: 'Cinzel', 'Georgia', serif;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.info-section {
    background: linear-gradient(135deg, #f9f3e8 0%, #f4e8d8 100%);
    padding: 40px;
    margin-top: 40px;
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    border: 3px solid var(--border-color);
    position: relative;
    transition: all 0.3s ease;
}

body.dark-mode .info-section {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--parchment) 100%);
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.info-section::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border: 1px solid rgba(139, 111, 71, 0.2);
    pointer-events: none;
}

body.dark-mode .info-section::before {
    border: 1px solid rgba(201, 167, 111, 0.15);
}

.info-section h2 {
    font-size: 2rem;
    color: var(--ink);
    margin-bottom: 20px;
    text-align: center;
    font-family: 'Cinzel', 'Georgia', serif;
    font-weight: 700;
    letter-spacing: 2px;
}

.info-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

footer {
    text-align: center;
    padding: 30px 20px;
    margin-top: 50px;
    background: linear-gradient(135deg, #f4e8d8 0%, #e8dcc8 100%);
    border: 3px solid var(--border-color);
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transition: all 0.3s ease;
}

body.dark-mode footer {
    background: linear-gradient(135deg, #2a2218 0%, #1a1410 100%);
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.footer-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 26px;
    background: linear-gradient(135deg, #8b6f47 0%, #6f5535 100%);
    border: 2px solid var(--border-color);
    color: #f9f3e8;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Cinzel', 'Georgia', serif;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 
        0 4px 10px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.footer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 6px 20px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.discord-btn:hover {
    border-color: #5865F2;
    background: linear-gradient(135deg, #5865F2 0%, #4752c4 100%);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(88, 101, 242, 0.5);
}

.github-btn:hover {
    border-color: #c0c0c0;
    background: linear-gradient(135deg, #757575 0%, #424242 100%);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(192, 192, 192, 0.5);
}

.btn-icon {
    font-size: 1.2rem;
}

.btn-text {
    font-size: 1rem;
    font-family: 'Cinzel', 'Georgia', serif;
}

footer p {
    color: var(--text-primary);
    font-size: 1rem;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        padding-top: 70px;
    }

    header h1 {
        font-size: 2.5rem;
    }

    header p {
        font-size: 1.1rem;
    }

    .theme-toggle {
        top: 15px;
        right: 15px;
        padding: 10px 16px;
        font-size: 0.85rem;
    }

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

    .craft-icon {
        font-size: 3rem;
    }

    .craft-title {
        font-size: 1.5rem;
    }

    .footer-buttons {
        flex-direction: column;
        width: 100%;
    }

    .footer-btn {
        width: 100%;
        justify-content: center;
    }

    .container {
        padding: 10px;
    }

    button, input[type="button"], input[type="submit"] {
        min-height: 44px;
        padding: 10px 16px;
    }

    select, input[type="text"], input[type="number"] {
        min-height: 44px;
    }
}

@media (max-width: 480px) {
    header {
        padding-top: 65px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    header p {
        font-size: 0.9rem;
    }

    .theme-toggle {
        top: 10px;
        right: 10px;
        padding: 8px 12px;
        font-size: 0.8rem;
        gap: 6px;
    }

    .theme-toggle-text {
        display: none;
    }

    .craft-card {
        padding: 20px;
    }

    .craft-icon {
        font-size: 2.5rem;
    }

    .craft-title {
        font-size: 1.2rem;
    }

    .craft-description {
        font-size: 0.85rem;
    }

    body {
        font-size: 14px;
    }
}

/* Coffee Popup */
.coffee-popup {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    text-decoration: none;
}

.coffee-popup img {
    height: 50px;
    width: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.coffee-popup:hover img {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 0 20px rgba(255, 221, 0, 0.3);
}

@media (max-width: 768px) {
    .coffee-popup {
        bottom: 15px;
        right: 15px;
    }
    
    .coffee-popup img {
        height: 45px;
    }
    
    .coffee-text {
        display: none;
    }
}

/* Calculator Navigation Bar */
.calc-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--parchment) 100%);
    border: 2px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    flex-wrap: wrap;
    transition: all 0.3s ease;
}

body.dark-mode .calc-nav {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--parchment) 100%);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
}

.calc-nav .nav-link {
    padding: 12px 24px;
    background: linear-gradient(135deg, #e8dcc8 0%, #d4c4a8 100%);
    border: 2px solid var(--border-color);
    color: var(--ink);
    text-decoration: none;
    font-family: 'Cinzel', 'Georgia', serif;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.calc-nav .nav-icon {
    height: 1.5rem;
    width: auto;
    filter: sepia(0.3) brightness(0.8);
    transition: filter 0.3s ease;
}

body.dark-mode .calc-nav .nav-link {
    background: linear-gradient(135deg, #3a2e24 0%, #2a2218 100%);
    color: var(--text-primary);
}

body.dark-mode .calc-nav .nav-icon {
    filter: brightness(1.2) sepia(0.2);
}

.calc-nav .nav-link:hover {
    background: linear-gradient(135deg, #8b3a3a 0%, #6b2a2a 100%);
    color: #f9f3e8;
    border-color: var(--hover-border);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(139, 58, 58, 0.5);
}

.calc-nav .nav-link:hover .nav-icon {
    filter: brightness(1.3) sepia(0);
}

body.dark-mode .calc-nav .nav-link:hover {
    background: linear-gradient(135deg, #d4937c 0%, #c9a76f 100%);
    color: #1a1410;
    box-shadow: 0 4px 15px rgba(212, 147, 124, 0.5);
}

body.dark-mode .calc-nav .nav-link:hover .nav-icon {
    filter: brightness(1.4) sepia(0);
}

.calc-nav .nav-link.active {
    background: linear-gradient(135deg, #8b3a3a 0%, #6b2a2a 100%);
    color: #f9f3e8;
    border-color: #6b2a2a;
    box-shadow: 0 4px 15px rgba(139, 58, 58, 0.6);
}

.calc-nav .nav-link.active .nav-icon {
    filter: brightness(1.3) sepia(0);
}

body.dark-mode .calc-nav .nav-link.active {
    background: linear-gradient(135deg, #d4937c 0%, #c9a76f 100%);
    color: #1a1410;
    border-color: var(--hover-border);
    box-shadow: 0 4px 15px rgba(212, 147, 124, 0.6);
}

body.dark-mode .calc-nav .nav-link.active .nav-icon {
    filter: brightness(1.4) sepia(0);
}

@media (max-width: 768px) {
    .calc-nav {
        padding: 15px;
        gap: 10px;
    }
    
    .calc-nav .nav-link {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}