:root {
    --bg-color: #0d0f12;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.07);
    --primary: #024eff;
    --primary-glow: rgba(2, 78, 255, 0.35);
    --emerald: #10b981;
    --emerald-glow: rgba(16, 185, 129, 0.35);
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --gradient: linear-gradient(135deg, #3b82f6 0%, #024eff 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    z-index: 100;
    background: rgba(13, 15, 18, 0.85);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover, .nav-link.highlight {
    color: var(--text-color);
}

.auth-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

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

.btn-login:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-register {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-register:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-installer {
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    color: #fff;
    box-shadow: 0 4px 14px var(--emerald-glow);
}

.btn-installer:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--emerald-glow);
}

.btn-large {
    padding: 12px 28px;
    font-size: 15px;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 100px 0;
    text-align: center;
}

.hero-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 54px;
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1.15;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 40px auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* Features */
.features {
    padding: 100px 0;
    background: radial-gradient(100% 100% at 50% 100%, rgba(2, 78, 255, 0.05) 0%, rgba(13, 15, 18, 0) 100%);
    border-top: 1px solid var(--card-border);
}

.section-title {
    text-align: center;
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 60px auto;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1100px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 24px;
    text-align: left;
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(2, 78, 255, 0.4);
    box-shadow: 0 10px 40px rgba(2, 78, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
}

.feature-icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: rgba(2, 78, 255, 0.1);
    border: 1px solid rgba(2, 78, 255, 0.25);
    margin-bottom: 24px;
    box-shadow: 0 8px 16px rgba(2, 78, 255, 0.05);
}

.feature-icon {
    font-size: 28px;
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.2px;
}

.feature-desc {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 24px;
}

.feature-list li {
    font-size: 13.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
    position: relative;
    padding-left: 20px;
    line-height: 1.6;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
    font-size: 14px;
}

.feature-list li strong {
    color: var(--text-color);
}

.feature-list li:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 14px;
}