@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
    --bg-dark: #050508;
    --primary: #7c3aed; /* Deep purple */
    --primary-glow: rgba(124, 58, 237, 0.5);
    --accent: #2dd4bf; /* Neon teal */
    --accent-glow: rgba(45, 212, 191, 0.6);
    --glass-bg: rgba(20, 20, 30, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    opacity: 0; /* Handled by JS for smooth intro fade */
}

/* Backgrounds */
#stars-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
}

#topo-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    /* Simulated topographical line art with SVG data URI */
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="600" height="600" opacity="0.04"><path d="M0 100 Q 150 200 300 50 T 600 150" stroke="white" fill="none" stroke-width="1"/><path d="M0 200 Q 150 300 300 150 T 600 250" stroke="white" fill="none" stroke-width="1"/><path d="M0 300 Q 200 400 400 200 T 600 350" stroke="white" fill="none" stroke-width="1"/><path d="M100 0 Q 200 200 50 400 T 250 600" stroke="white" fill="none" stroke-width="1"/></svg>');
    background-size: cover;
    mix-blend-mode: overlay;
}

/* Glassmorphism */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel-sm {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
}

/* Layout */
#app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 20px;
    max-width: 1600px;
    margin: 0 auto;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    margin-bottom: 40px;
    position: sticky;
    top: 20px;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.neon-accent {
    color: var(--accent);
    text-shadow: 0 0 12px var(--accent-glow);
    font-size: 1.8rem;
}

.neon-accent-text {
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

.search-bar {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 10px 24px;
    width: 450px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-bar:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(45, 212, 191, 0.2);
    transform: translateY(-1px);
}

.search-bar input {
    background: none;
    border: none;
    color: white;
    outline: none;
    margin-left: 12px;
    width: 100%;
    font-size: 1rem;
}

/* Buttons */
.glass-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 10px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.glass-btn:active {
    transform: translateY(1px) scale(0.97);
}

#user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 16px 6px 6px;
}

.avatar {
    width: 32px;
    height: 32px;
    background: var(--primary);
    border-radius: 50%;
    object-fit: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 10px var(--primary-glow);
}

.avatar-lg {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 0 20px var(--primary-glow);
    border: 2px solid var(--accent);
}

.profile-pic-upload {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#logout-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    cursor: pointer;
    margin-left: 15px;
    transition: all 0.2s;
    font-size: 1.1rem;
    padding: 8px 12px;
    border-radius: 50%;
}
#logout-btn:hover { 
    color: #ef4444; 
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    transform: scale(1.1);
}

/* Hero */
.hero {
    padding: 40px 20px;
    margin-bottom: 50px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(0,0,0,0) 100%), var(--glass-bg);
    position: relative;
    overflow: hidden;
}

.hero-logo-wrapper {
    animation: float 6s ease-in-out infinite;
    z-index: 2;
    position: relative;
}

.hero-logo {
    max-width: 100%;
    height: auto;
    max-height: 180px;
    filter: drop-shadow(0 0 25px rgba(124, 58, 237, 0.7));
    transition: transform 0.1s ease-out, filter 0.4s ease; /* Smooth tracking */
    transform-style: preserve-3d;
}

.hero-logo:hover {
    filter: drop-shadow(0 0 40px rgba(45, 212, 191, 0.9)) drop-shadow(0 0 20px rgba(124, 58, 237, 0.8));
}

@keyframes float {
    0% { transform: translateY(0px) scale(1); filter: drop-shadow(0 0 20px rgba(124, 58, 237, 0.5)); }
    50% { transform: translateY(-12px) scale(1.02); filter: drop-shadow(0 0 35px rgba(45, 212, 191, 0.6)); }
    100% { transform: translateY(0px) scale(1); filter: drop-shadow(0 0 20px rgba(124, 58, 237, 0.5)); }
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%; right: -20%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    filter: blur(60px);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

/* Game Rows */
.game-category {
    margin-bottom: 45px;
}

.game-category h2 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-left: 15px;
    border-left: 5px solid var(--primary);
    display: flex;
    align-items: center;
}

.game-row {
    display: flex;
    gap: 25px;
    overflow-x: auto;
    padding: 10px 15px 30px 15px;
    scroll-behavior: smooth;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.game-row::-webkit-scrollbar { display: none; }

/* Game Card & 3D Tilt */
.game-card {
    min-width: 260px;
    height: 340px;
    border-radius: 20px;
    background-size: cover;
    background-position: center;
    position: relative;
    cursor: pointer;
    /* Setup for tilt.js style 3D effect applied via JS */
    transform-style: preserve-3d;
    transform: perspective(1000px);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease;
    border: 1px solid rgba(255,255,255,0.05);
}

.game-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
    z-index: 1;
}

.game-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    background: radial-gradient(circle 200px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.2), transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 5;
    pointer-events: none;
    mix-blend-mode: overlay;
}

.game-card:hover::after {
    opacity: 1;
}

.game-card:hover {
    box-shadow: 0 20px 40px rgba(124, 58, 237, 0.4);
    border-color: rgba(124, 58, 237, 0.5);
    z-index: 10;
}

.game-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 24px;
    z-index: 2;
    transform: translateZ(40px); /* Pushes text forward in 3D space */
}

.game-info h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 6px;
    color: white;
}

.game-info p {
    font-size: 0.95rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Auth Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.4s cubic-bezier(0.22, 1, 0.36, 1), backdrop-filter 0.4s;
}

.modal-overlay.hidden {
    opacity: 0;
    backdrop-filter: blur(0px);
    pointer-events: none;
    transition: opacity 0.3s ease, backdrop-filter 0.3s ease;
}

.auth-panel {
    width: 440px;
    padding: 40px;
    position: relative;
    transform: translateY(0) scale(1) rotateX(0);
    opacity: 1;
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.5s;
    background: linear-gradient(180deg, rgba(20,20,30,0.8) 0%, rgba(10,10,15,0.9) 100%);
    perspective: 1000px;
    transform-style: preserve-3d;
}

.modal-overlay.hidden .auth-panel {
    transform: translateY(60px) scale(0.9) rotateX(-10deg);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.auth-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.auth-header i {
    font-size: 2rem;
}

.auth-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
}

.auth-panel > p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

#auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    position: relative;
}

.input-group i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.input-group input {
    width: 100%;
    background: rgba(0,0,0,0.4);
    border: 1px solid var(--glass-border);
    padding: 14px 14px 14px 44px;
    border-radius: 12px;
    color: white;
    outline: none;
    font-size: 1rem;
    transition: all 0.3s;
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(124, 58, 237, 0.2);
}

.neon-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 20px var(--primary-glow);
    margin-top: 10px;
}

.neon-btn:hover {
    background: #6d28d9;
    box-shadow: 0 0 30px var(--primary-glow);
    transform: translateY(-2px);
}

.neon-btn:active {
    transform: scale(0.96);
}

#close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}
#close-modal:hover { color: white; }

#auth-msg {
    margin-top: 20px;
    text-align: center;
    font-weight: 600;
}

/* Panic Screen (Fake Google Classroom) */
#panic-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #ffffff;
    z-index: 9999;
    color: #3c4043;
    font-family: 'Roboto', 'Segoe UI', Arial, sans-serif; /* Standard Google font stack */
}

#panic-screen.hidden {
    display: none;
}

.classroom-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-bottom: 1px solid #dadce0;
}

.class-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    color: #5f6368;
}

.avatar-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #1a73e8;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 500;
}

.classroom-content {
    padding: 24px;
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.class-card {
    width: 300px;
    border: 1px solid #dadce0;
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

.class-card-top {
    color: white;
    padding: 16px;
    height: 100px;
}

.class-card-top h2 {
    font-size: 22px;
    font-weight: 400;
    margin-bottom: 4px;
}

.class-card-top p {
    font-size: 13px;
}

.class-card-bottom {
    padding: 16px;
    display: flex;
    justify-content: flex-end;
    color: #5f6368;
    border-top: 1px solid #dadce0;
}

/* Utility */
.hidden { display: none !important; }