@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Inter:wght@400;600;700&display=swap');

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

:root {
    --neon-mint: #00FF9C;
    --aqua: #00D1FF;
    --onyx: #111316;
    --graphite: #1A1F24;
    --off-white: #F7F7F7;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--onyx);
    color: var(--off-white);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 255, 156, 0.03) 0px,
        rgba(0, 255, 156, 0.03) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    z-index: 9999;
}

code, pre, .mono {
    font-family: 'JetBrains Mono', monospace;
}

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

.header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
    border-bottom: 2px solid var(--graphite);
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon-mint);
    text-shadow: 0 0 20px var(--neon-mint), 0 0 40px var(--neon-mint);
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.ascii-divider {
    font-family: 'JetBrains Mono', monospace;
    color: var(--aqua);
    font-size: 0.9rem;
    margin: 1rem 0;
    text-shadow: 0 0 10px var(--aqua);
}

.tagline {
    font-size: 0.9rem;
    color: var(--aqua);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.nav {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 1.5rem 0;
}

.btn {
    font-family: 'JetBrains Mono', monospace;
    padding: 0.75rem 1.5rem;
    background: var(--graphite);
    border: 2px solid var(--neon-mint);
    color: var(--neon-mint);
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 0 10px rgba(0, 255, 156, 0.2);
}

.btn:hover {
    background: var(--neon-mint);
    color: var(--onyx);
    box-shadow: 0 0 20px var(--neon-mint), 0 0 40px var(--neon-mint);
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--neon-mint);
    color: var(--onyx);
    border-color: var(--neon-mint);
}

.btn-primary:hover {
    background: transparent;
    color: var(--neon-mint);
}

.btn-aqua {
    border-color: var(--aqua);
    color: var(--aqua);
}

.btn-aqua:hover {
    background: var(--aqua);
    color: var(--onyx);
    box-shadow: 0 0 20px var(--aqua), 0 0 40px var(--aqua);
}

.card {
    background: var(--graphite);
    border: 2px solid var(--neon-mint);
    padding: 2rem;
    margin: 1.5rem 0;
    box-shadow: 0 0 15px rgba(0, 255, 156, 0.1);
}

.flashcard {
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.flashcard .question {
    font-size: 1.3rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.flashcard .answer {
    font-size: 1.1rem;
    color: var(--aqua);
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 209, 255, 0.1);
    border: 1px solid var(--aqua);
}

.flashcard .meta {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--neon-mint);
    margin-top: 1rem;
    opacity: 0.7;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.stat-box {
    background: var(--graphite);
    border: 2px solid var(--aqua);
    padding: 1.5rem;
    text-align: center;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(1.25rem, 3.5vw + 0.5rem, 2.5rem);
    color: var(--neon-mint);
    text-shadow: 0 0 15px var(--neon-mint);
    display: block;
    margin-bottom: 0.5rem;
    overflow-wrap: break-word;
    max-width: 100%;
    line-height: 1.2;
    min-height: 3rem;
}

.stat-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--aqua);
}

.leaderboard {
    list-style: none;
}

.leaderboard-item {
    background: var(--graphite);
    border-left: 3px solid var(--neon-mint);
    padding: 1rem 1.5rem;
    margin: 0.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
}

.leaderboard-item:hover {
    background: rgba(0, 255, 156, 0.1);
    border-left-width: 5px;
    transform: translateX(5px);
}

.leaderboard-item.rank-1 {
    border-left-color: #FFD700;
    background: rgba(255, 215, 0, 0.05);
}

.leaderboard-item.rank-2 {
    border-left-color: #C0C0C0;
    background: rgba(192, 192, 192, 0.05);
}

.leaderboard-item.rank-3 {
    border-left-color: #CD7F32;
    background: rgba(205, 127, 50, 0.05);
}

.rank {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--neon-mint);
    min-width: 40px;
}

.handle {
    font-family: 'JetBrains Mono', monospace;
    flex: 1;
    color: var(--off-white);
}

.points {
    font-family: 'JetBrains Mono', monospace;
    color: var(--aqua);
    font-size: 1.1rem;
}

.store-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.store-item {
    background: var(--graphite);
    border: 2px solid var(--aqua);
    padding: 1.5rem;
    transition: all 0.3s;
}

.store-item:hover {
    border-color: var(--neon-mint);
    box-shadow: 0 0 20px rgba(0, 255, 156, 0.2);
    transform: translateY(-5px);
}

.store-item .title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    color: var(--neon-mint);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.store-item .price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    color: var(--aqua);
    margin-bottom: 1rem;
}

.store-item .benefits {
    list-style: none;
    margin: 1rem 0;
}

.store-item .benefits li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 255, 156, 0.2);
    font-size: 0.9rem;
}

.store-item .benefits li:before {
    content: '▸ ';
    color: var(--neon-mint);
    margin-right: 0.5rem;
}

.terminal-text {
    font-family: 'JetBrains Mono', monospace;
    color: var(--neon-mint);
    text-shadow: 0 0 10px var(--neon-mint);
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--graphite);
    margin: 1rem 0;
    position: relative;
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    background: var(--neon-mint);
    box-shadow: 0 0 10px var(--neon-mint);
    transition: width 0.3s;
}

.hidden {
    display: none !important;
}

.section-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    color: var(--neon-mint);
    text-transform: uppercase;
    margin: 2rem 0 1rem;
    text-shadow: 0 0 15px var(--neon-mint);
}

.glow {
    text-shadow: 0 0 10px currentColor, 0 0 20px currentColor;
}

@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.flicker {
    animation: flicker 0.15s infinite;
}

input[type="text"],
select {
    font-family: 'JetBrains Mono', monospace;
    background: var(--graphite);
    border: 2px solid var(--aqua);
    color: var(--off-white);
    padding: 0.75rem;
    font-size: 0.9rem;
    width: 100%;
    max-width: 300px;
}

input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--neon-mint);
    box-shadow: 0 0 10px var(--neon-mint);
}

.controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--graphite);
    border: 2px solid var(--neon-mint);
    padding: 1rem 1.5rem;
    box-shadow: 0 0 20px rgba(0, 255, 156, 0.3);
    z-index: 10000;
    animation: slideIn 0.3s;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.tab {
    font-family: 'JetBrains Mono', monospace;
    padding: 0.75rem 1.5rem;
    background: var(--graphite);
    border: 2px solid var(--graphite);
    color: var(--off-white);
    cursor: pointer;
    text-transform: uppercase;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.tab.active {
    border-color: var(--neon-mint);
    color: var(--neon-mint);
    box-shadow: 0 0 10px rgba(0, 255, 156, 0.2);
}

.tab:hover {
    border-color: var(--aqua);
    color: var(--aqua);
}

/* ========================================
   MOBILE RESPONSIVE DESIGN
   ======================================== */

/* Tablets and smaller (below 900px) */
@media (max-width: 900px) {
    .container {
        padding: 1rem;
    }

    .header {
        padding: 1rem 0;
        margin-bottom: 2rem;
    }

    .logo {
        font-size: 1.5rem;
    }

    .ascii-divider {
        font-size: 0.65rem;
        overflow-x: auto;
        white-space: nowrap;
    }

    /* Navigation wraps to 2 rows on tablets */
    .nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.75rem;
        flex: 1 1 calc(25% - 0.5rem);
        min-width: 100px;
        text-align: center;
    }

    /* Tabs responsive */
    .tabs {
        gap: 0.25rem;
        flex-wrap: wrap;
    }

    .tab {
        padding: 0.6rem 1rem;
        font-size: 0.75rem;
        flex: 1;
    }

    /* Stats grid adjusts */
    .stats {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.75rem;
    }

    .stat-box {
        padding: 1rem;
    }
}

/* Mobile phones (below 600px) */
@media (max-width: 600px) {
    .container {
        padding: 0.75rem;
    }

    .header {
        padding: 0.75rem 0;
        margin-bottom: 1.5rem;
    }

    .logo {
        font-size: 1.25rem;
        letter-spacing: 1px;
    }

    .tagline {
        font-size: 0.75rem;
        letter-spacing: 2px;
    }

    .ascii-divider {
        font-size: 0.6rem;
    }

    /* Navigation stacks vertically on mobile */
    .nav {
        flex-direction: column;
        gap: 0.5rem;
        margin: 1rem 0;
    }

    .btn {
        width: 100%;
        padding: 0.75rem;
        font-size: 0.8rem;
        text-align: center;
    }

    /* Tabs stack on mobile */
    .tabs {
        flex-direction: column;
        gap: 0.5rem;
    }

    .tab {
        width: 100%;
        text-align: center;
        padding: 0.75rem;
    }

    /* Section titles smaller */
    .section-title {
        font-size: 1.1rem;
        margin: 1.5rem 0 0.75rem;
    }

    /* Stats stack vertically */
    .stats {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    /* Leaderboard items compact */
    .leaderboard-item {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        font-size: 0.9rem;
    }

    .rank {
        font-size: 1rem;
        min-width: 35px;
    }

    .handle {
        font-size: 0.9rem;
    }

    .points {
        font-size: 0.95rem;
    }

    /* Store grid single column */
    .store-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Flashcard smaller */
    .flashcard {
        min-height: 250px;
        padding: 1rem;
    }

    .flashcard .question {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .flashcard .answer {
        font-size: 0.95rem;
        padding: 0.75rem;
    }

    .flashcard .meta {
        font-size: 0.7rem;
    }

    /* Card padding reduced */
    .card {
        padding: 1rem;
        margin: 1rem 0;
    }

    /* Controls wrap better */
    .controls {
        gap: 0.5rem;
        margin: 1rem 0;
    }

    /* Input fields full width */
    input[type="text"],
    select {
        max-width: 100%;
        font-size: 0.85rem;
        padding: 0.6rem;
    }

    /* Notification repositioned */
    .notification {
        top: 1rem;
        right: 1rem;
        left: 1rem;
        padding: 0.75rem 1rem;
        font-size: 0.85rem;
    }
}

/* Extra small phones (below 400px) */
@media (max-width: 400px) {
    .logo {
        font-size: 1.1rem;
    }

    .tagline {
        font-size: 0.7rem;
        letter-spacing: 1px;
    }

    .btn {
        padding: 0.6rem;
        font-size: 0.75rem;
    }

    .section-title {
        font-size: 1rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }
    
    /* Profile button positioning on mobile */
    .card {
        position: relative;
    }
    
    /* Battle mode selector stacks vertically on very small screens */
    .battle-mode-selector {
        grid-template-columns: 1fr !important;
    }
}

/* Mobile improvements for modals and overlays */
@media (max-width: 768px) {
    /* Profile modal responsive */
    #profile-modal .card {
        max-width: 95% !important;
        margin: 1rem;
    }
    
    /* Card inventory grid responsive */
    [style*="grid-template-columns: repeat(auto-fill, minmax(200px, 1fr))"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Battle mode cards responsive */
    .battle-mode-selector {
        grid-template-columns: 1fr !important;
        gap: 0.75rem !important;
    }
    
    /* Nav wraps on smaller screens */
    .nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .nav .btn {
        flex: 1 1 calc(33.333% - 0.5rem);
        min-width: 100px;
        padding: 0.6rem 0.75rem;
        font-size: 0.75rem;
    }
}

/* Accessibility Controls Styling */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--neon-mint);
    color: var(--onyx);
    padding: 0.5rem 1rem;
    text-decoration: none;
    font-weight: bold;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

.ada-controls {
    position: fixed;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 0.5rem;
    z-index: 9998;
}

.ada-btn {
    background: var(--graphite);
    border: 2px solid var(--aqua);
    color: var(--aqua);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.ada-btn:hover,
.ada-btn:focus {
    background: var(--aqua);
    color: var(--onyx);
    box-shadow: 0 0 15px rgba(0, 209, 255, 0.5);
}

.ada-btn[aria-pressed="true"] {
    background: var(--neon-mint);
    color: var(--onyx);
    border-color: var(--neon-mint);
}

/* Mobile ADA Controls - Compact Floating Button */
@media (max-width: 768px) {
    .ada-controls {
        top: auto;
        bottom: 80px;
        right: 10px;
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .ada-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.65rem;
        min-width: 60px;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .ada-controls {
        bottom: 70px;
        right: 5px;
    }
    
    .ada-btn {
        padding: 0.35rem 0.5rem;
        font-size: 0.6rem;
        min-width: 50px;
    }
}