@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&family=Montserrat:wght@400;700&display=swap');

:root {
    --font-body: 'Montserrat', sans-serif;
    --font-mono: 'Fira Code', monospace;
    --transition-fast: 0.2s ease-in-out;
    --transition-med: 0.4s ease-in-out;
    --mouse-x: 0;
    --mouse-y: 0;
}

.theme-cyber { --bg-color: #0a0f1e; --primary-blue: #4fc3f7; --primary-blue-trans: rgba(79, 195, 247, 0.2); --accent-red: #ff2f5a; --text-color: #d0d8e8; --section-bg: rgba(10, 15, 30, 0.4); --border-color: rgba(79, 195, 247, 0.2); }
.theme-matrix { --bg-color: #000; --primary-blue: #00ff41; --primary-blue-trans: rgba(0, 255, 65, 0.2); --accent-red: #ff0000; --text-color: #00ff41; --section-bg: rgba(0, 20, 0, 0.4); --border-color: rgba(0, 255, 65, 0.2); }
.theme-solarized { --bg-color: #002b36; --primary-blue: #268bd2; --primary-blue-trans: rgba(38, 139, 210, 0.2); --accent-red: #dc322f; --text-color: #839496; --section-bg: rgba(0, 30, 40, 0.4); --border-color: rgba(38, 139, 210, 0.2); }

* { box-sizing: border-box; }
body { background-color: var(--bg-color); color: var(--text-color); font-family: var(--font-body); min-height: 100vh; margin: 0; overflow-x: hidden; animation: train-rumble 0.5s linear infinite alternate; }
@keyframes train-rumble {
    from { transform: translateX(-0.25px); }
    to { transform: translateX(0.25px); }
}

main { z-index: 2; position: relative; max-width: 1200px; width: 95%; margin: 0 auto; padding-top: 120px; padding-bottom: 2rem; }
code { font-family: var(--font-mono); background: rgba(79, 195, 247, 0.1); color: var(--primary-blue); padding: 0.2rem 0.5rem; border-radius: 4px; border: 1px solid var(--border-color); }

.vignette { position: fixed; top: 0; left: 0; width: 100%; height: 100%; box-shadow: inset 0 0 15vw rgba(0,0,0,0.8); pointer-events: none; z-index: 5; }

body::before, body::after {
    content: '';
    position: fixed;
    top: -5%; left: -5%;
    width: 110%; height: 110%;
    z-index: -2;
    background-size: 200% 200%;
    filter: blur(100px);
    opacity: 0.5;
    transition: transform 0.1s linear;
}
body::before {
    background-image: radial-gradient(circle at 20% 20%, var(--primary-blue), transparent 40%),
                      radial-gradient(circle at 80% 70%, var(--accent-red), transparent 40%);
    transform: translate(calc(var(--mouse-x) * -40px), calc(var(--mouse-y) * -40px));
}
body::after {
    background-image: radial-gradient(circle at 50% 80%, var(--primary-blue), transparent 30%);
    transform: translate(calc(var(--mouse-x) * -20px), calc(var(--mouse-y) * -20px));
}

#cursor-light { position: fixed; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, var(--primary-blue-trans) 0%, transparent 60%); pointer-events: none; z-index: 999; mix-blend-mode: screen; transition: transform 0.1s ease-out; transform: translate(-50%, -50%); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: var(--primary-blue); border-radius: 10px; border: 2px solid var(--bg-color); }
::-webkit-scrollbar-thumb:hover { background: var(--accent-red); }

#preloader { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: var(--bg-color); z-index: 9999; display: flex; align-items: center; justify-content: center; transition: opacity 0.5s, visibility 0.5s; }
.glitch { position: relative; color: #fff; filter: drop-shadow(0 0 2px var(--primary-blue)); }
.glitch:hover::before, .glitch:hover::after, .glitch-text::before, .glitch-text::after { content: attr(data-text); position: absolute; top: 0; left: 0; background: var(--bg-color); overflow: hidden; clip: rect(0, 0, 0, 0); }
.glitch:hover::before, .glitch-text::before { left: 2px; text-shadow: -1px 0 var(--accent-red); animation: glitch-anim 2s infinite linear alternate-reverse; }
.glitch:hover::after, .glitch-text::after { left: -2px; text-shadow: -1px 0 var(--primary-blue); animation: glitch-anim 3s infinite linear alternate-reverse; }
@keyframes glitch-anim { 0% { clip: rect(42px, 9999px, 44px, 0); } 100% { clip: rect(2px, 9999px, 92px, 0); } }
.anim-fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.anim-fade-in.visible { opacity: 1; transform: translateY(0); }

.navbar { position: fixed; top: 0; left: 0; width: 100%; background-color: rgba(10, 15, 30, 0.5); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); z-index: 10; overflow: hidden; background-image: linear-gradient(90deg, transparent 20%, var(--primary-blue-trans) 50%, transparent 80%); background-size: 300% 100%; animation: liquid-light 8s linear infinite; }
.navbar-content { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; width: 95%; margin: 0 auto; padding: 1rem 0; }
@keyframes liquid-light { 0% { background-position: 150% 0; } 100% { background-position: -150% 0; } }
.nav-logo { font-size: 1.5rem; text-decoration: none; font-weight: 700; z-index: 1; }
.nav-links { list-style: none; display: flex; gap: 0.2rem; margin: 0; padding: 0; flex-wrap: wrap; z-index: 1; }
.nav-link { color: var(--text-color); text-decoration: none; font-size: 1rem; padding: 0.6rem 1rem; border-radius: 0.5rem; position: relative; transition: color var(--transition-fast), text-shadow var(--transition-fast); }
.nav-link:hover, .nav-link.active { color: #fff; text-shadow: 0 0 8px var(--primary-blue); }
.navbar-hud { display: flex; align-items: center; gap: 1.5rem; font-family: var(--font-mono); z-index: 1; }
#navbar-clock { color: var(--primary-blue); text-shadow: 0 0 5px var(--primary-blue-trans); }
#settings-toggle { font-size: 1.5rem; cursor: pointer; color: var(--text-color); transition: transform var(--transition-med), color var(--transition-fast); }
#settings-toggle:hover { color: #fff; transform: rotate(90deg); }
#settings-panel { position: fixed; top: 80px; right: 20px; background: var(--section-bg); border: 1px solid var(--border-color); border-radius: 0.5rem; padding: 1rem; z-index: 11; display: flex; flex-direction: column; gap: 0.5rem; transform: translateX(120%); transition: transform var(--transition-med); }
#settings-panel.visible { transform: translateX(0); }

h1.glitch, h2.glitch { background: linear-gradient(90deg, var(--primary-blue), #fff, var(--accent-red), var(--primary-blue)); background-size: 300% auto; color: transparent; -webkit-background-clip: text; background-clip: text; animation: text-shine 8s linear infinite; }
@keyframes text-shine { from { background-position: 0% center; } to { background-position: -300% center; } }

section { background: var(--section-bg); backdrop-filter: blur(5px); border: 1px solid var(--border-color); border-radius: 1rem; padding: 2.5rem; margin-bottom: 2rem; position: relative; }
section::before, section::after { content: ''; position: absolute; width: 25px; height: 25px; border-color: var(--primary-blue); border-style: solid; opacity: 0.5; transition: all var(--transition-med); }
section::before { top: 15px; left: 15px; border-width: 2px 0 0 2px; }
section::after { bottom: 15px; right: 15px; border-width: 0 2px 2px 0; }
section:hover::before { transform: translate(-5px, -5px); }
section:hover::after { transform: translate(5px, 5px); }

.scope-grid, .pattern-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2.5rem; }
.scope-card, .pattern-card { background: #0e1528; border: 1px solid var(--border-color); padding: 1.5rem; border-radius: 0.5rem; transition: transform var(--transition-fast), box-shadow var(--transition-fast); position: relative; overflow: hidden; transform-style: preserve-3d; }
.scope-card:hover, .pattern-card:hover { box-shadow: 0 10px 40px rgba(0,0,0,0.5); }
.pattern-card { cursor: pointer; }
.card-category { position: absolute; top: -1px; right: 1rem; background: var(--primary-blue); color: var(--bg-color); padding: 0.2rem 0.8rem; font-size: 0.8rem; font-weight: bold; border-radius: 0 0 0.5rem 0.5rem; z-index: 2; }

.copy-feedback { position: absolute; bottom: 1rem; right: 1rem; background: var(--primary-blue); color: var(--bg-color); padding: 0.3rem 0.8rem; border-radius: 4px; font-family: var(--font-mono); font-weight: bold; z-index: 3; opacity: 0; transform: translateY(10px); transition: all 0.3s ease-out; pointer-events: none; }
.pattern-card.copied .copy-feedback { opacity: 1; transform: translateY(0); }

.input-group { margin-bottom: 1.5rem; position: relative; }
input[type="text"], textarea, select { background: rgba(10, 15, 30, 0.7); border: 1px solid var(--border-color); border-radius: 0.5rem; color: #fff; font-size: 1.1rem; padding: 0.8rem 1rem; outline: none; font-family: var(--font-mono); transition: border-color var(--transition-fast), box-shadow var(--transition-fast); width: 100%; }
textarea { resize: vertical; }
button, .home-btn { padding: 0.8rem 1.8rem; border-radius: 0.5rem; cursor: pointer; font-family: var(--font-mono); transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast); text-decoration: none; border: 1px solid var(--primary-blue); }
button.primary, .home-btn.primary { background: var(--primary-blue); color: var(--bg-color); font-weight: bold; }
button.secondary, .home-btn.secondary { background: transparent; color: var(--primary-blue); }
button:hover, .home-btn:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 0 20px var(--primary-blue-trans); }
button:active, .home-btn:active { transform: translateY(-1px) scale(1); }
button:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }

.home-section { text-align: center; border: none; background: transparent; backdrop-filter: none; }
.typing-container { font-size: 4rem; text-align: center; min-height: 5rem; }
.typing-container .cursor { color: var(--primary-blue); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.visualizer-controls { margin-top: 1rem; display: flex; gap: 1rem; justify-content: center; }
.visualizer-controls button { background: transparent; color: var(--primary-blue); }
.visualizer-controls button:hover:not(:disabled) { background: var(--primary-blue); color: var(--bg-color); }

#explanation-log { width: 100%; height: 150px; background: #0e1528; border-radius: 4px; padding: 1rem; font-family: var(--font-mono); overflow-y: auto; white-space: pre-wrap; }
#explanation-log .info { color: var(--text-color); }
#explanation-log .match { color: #4caf50; }
#explanation-log .group { color: var(--primary-blue); }
#explanation-log .fail, #explanation-log .error { color: var(--accent-red); }

#pattern-visual, #string-visual {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    padding: 1rem;
    background: #0e1528;
    border-radius: 4px;
    margin-bottom: 1rem;
    white-space: pre;
    overflow-x: auto;
}
.char-pointer {
    background-color: var(--accent-red);
    color: var(--bg-color);
    border-radius: 2px;
    box-shadow: 0 0 5px var(--accent-red);
}
.char-highlight {
    background-color: var(--primary-blue-trans);
    border-bottom: 2px solid var(--primary-blue);
}

.cheatsheet-group { margin-bottom: 2rem; }
.token-container { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.token-card { background: #0e1528; border: 1px solid var(--border-color); padding: 1rem; border-radius: 4px; cursor: pointer; transition: transform var(--transition-fast), box-shadow var(--transition-fast); text-align: center; flex-grow: 1; }
.token-card:hover { transform: translateY(-3px); box-shadow: 0 0 15px var(--primary-blue-trans); }

.challenge-feedback-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
#match-list li.pass, #reject-list li.pass { background: rgba(0, 255, 65, 0.2); }
#match-list li.fail, #reject-list li.fail { background: rgba(255, 47, 90, 0.2); }

.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(10, 15, 30, 0.7); backdrop-filter: blur(10px); z-index: 1000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; }
.modal-overlay.visible { opacity: 1; visibility: visible; }
.modal-content { background: var(--bg-color); border: 1px solid var(--primary-blue); padding: 2rem; border-radius: 1rem; max-width: 500px; width: 90%; position: relative; }
.modal-close { position: absolute; top: 1rem; right: 1rem; background: none; border: none; color: var(--text-color); font-size: 1.5rem; cursor: pointer; }
#modal-demo .highlight { color: var(--bg-color); background: var(--primary-blue); }
footer { text-align: center; color: var(--text-color); padding: 2rem 0 1.5rem 0; opacity: 0.7; }

@media (max-width: 768px) {
    main { padding-top: 180px; }
    .navbar-content { flex-direction: column; gap: 1rem; }
    .nav-links { justify-content: center; }
    .typing-container { font-size: 2.5rem; }
    .challenge-feedback-grid { grid-template-columns: 1fr; }
}