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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1f2937;
    --light: #f9fafb;
    --border: #e5e7eb;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* Emoji Support */
.emoji {
    font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji', sans-serif;
    font-style: normal;
    display: inline-block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    margin-bottom: 30px;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--primary);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

/* Login/Register Cards */
.auth-container {
    min-height: calc(100vh - 100px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 450px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-actions {
    margin-top: 30px;
}

.form-actions button {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
}

.form-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

/* Alert Messages */
.alert {
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Game Grid */
.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.game-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
}

.game-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.game-card:hover .game-thumbnail::after {
    opacity: 0.3;
}

.game-thumbnail {
    width: 100%;
    height: 240px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.game-thumbnail .emoji {
    font-size: 120px;
    line-height: 1;
    text-align: center;
}

.game-thumbnail::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.6) 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.game-thumbnail img {
    transition: transform 0.4s;
}

.game-card:hover .game-thumbnail img {
    transform: scale(1.1);
}

.game-info {
    padding: 24px;
    position: relative;
}

.game-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--dark);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.game-description {
    font-size: 14px;
    color: #666;
    margin-bottom: 16px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 42px;
}

.game-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #999;
    padding-top: 12px;
    border-top: 1px solid #f0f0f0;
}

.game-type {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* Search Bar */
.search-bar {
    background: white;
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    margin-bottom: 40px;
}

.search-bar input {
    width: 100%;
    padding: 18px 24px;
    border: 2px solid var(--border);
    border-radius: 15px;
    font-size: 16px;
    transition: all 0.3s;
    background: #f9fafb;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

/* Dashboard */
.dashboard {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-top: 30px;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.dashboard h2 {
    color: var(--dark);
}

/* Template Upload Form */
.upload-form {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 100;
    max-height: 80vh;
    overflow-y: auto;
}

.file-upload {
    border: 2px dashed var(--border);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.3s;
}

.file-upload:hover {
    border-color: var(--primary);
}

.file-upload input[type="file"] {
    display: none;
}

/* Tab Buttons */
.tab-btn {
    background: none;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    margin-right: 10px;
}

.tab-btn:hover {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .game-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .game-card {
        max-width: 500px;
        margin: 0 auto;
    }

    .game-thumbnail {
        height: 200px;
    }

    .auth-card {
        padding: 30px 20px;
    }

    .search-bar {
        padding: 20px;
    }

    .search-bar input {
        padding: 15px 20px;
        font-size: 15px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .game-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }

    .game-thumbnail {
        height: 200px;
    }
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}