:root {
    --bg-dark: #070b13;
    --bg-card: #101622;
    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --border-color: #1e293b;
    --input-bg: #1e293b;
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
}

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

body {
    background: radial-gradient(circle at center, #0f172a 0%, #020617 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background-color: rgba(10, 14, 20, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

.logo img {
    height: 32px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-blue);
}

.nav-auth {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

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

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--border-color);
}

/* Hero Section */
.hero {
    padding: 100px 5% 50px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Features Section */
.features {
    padding: 100px 5%;
}

.features h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background-color: var(--bg-card);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--accent-blue);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #3b82f6, #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

.hero-img {
    margin-top: 50px;
    max-width: 1000px;
    width: 90%;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

/* Pricing Section */
.pricing {
    padding: 80px 5%;
    text-align: center;
}

.pricing h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.price-card {
    background-color: var(--bg-card);
    padding: 3rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
}

.price-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-blue);
}

.price-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price-card .price {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.price-card .price span {
    font-size: 1rem;
    color: var(--text-secondary);
}

.price-card ul {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
    flex-grow: 1;
}

.price-card ul li {
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
}

.price-card ul li::before {
    content: "✓";
    color: var(--accent-blue);
    margin-right: 10px;
}

.coming-soon {
    background-color: var(--border-color);
    color: var(--text-secondary);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-left: 10px;
}

/* Auth Pages Styles */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background-color: var(--bg-card);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--accent-blue);
    width: 100%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.auth-card h2 {
    margin: 15px 0 5px;
    font-size: 1.8rem;
}

.auth-card .sub-header {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.auth-card .logo-auth {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 600;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s;
    font-size: 0.95rem;
}

.form-group input:focus {
    border-color: var(--accent-blue);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    margin-bottom: 20px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.forgot-password {
    color: var(--accent-blue);
    text-decoration: none;
}

.auth-terms {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 20px 0;
}

.auth-terms a {
    color: var(--accent-blue);
    text-decoration: none;
}

.auth-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-bottom: 20px;
}

.auth-btn:hover {
    background-color: var(--accent-blue-hover);
}

.auth-footer {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
}

/* Dashboard Styles */
.dashboard-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.sidebar {
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: bold;
}

.sidebar-menu {
    list-style: none;
    flex-grow: 1;
}

.sidebar-menu li {
    margin-bottom: 0.5rem;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.8rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
}

.sidebar-menu a:hover, .sidebar-menu a.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
}

.main-content {
    padding: 2rem 5%;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.stat-card h4 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: bold;
}

.usage-bar {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    margin-top: 1rem;
    overflow: hidden;
}

.usage-progress {
    height: 100%;
    background-color: var(--accent-blue);
    width: 0%;
    transition: width 1s;
}

/* Activity Grid */
.activity-section {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(52, 1fr);
    gap: 4px;
}

.day {
    width: 12px;
    height: 12px;
    background-color: #1f2937;
    border-radius: 2px;
}

.day.level-1 { background-color: #0e4429; }
.day.level-2 { background-color: #006d32; }
.day.level-3 { background-color: #26a641; }
.day.level-4 { background-color: #39d353; }

.footer-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

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

.footer-stat-item .val {
    font-size: 1.5rem;
    font-weight: bold;
    display: block;
}

.footer-stat-item .label {
    color: var(--text-secondary);
    font-size: 0.8rem;
}