/* Base styles and variables */
:root {
    --text: #f0f0f0;
    --text-secondary: #d1d5db;
    --muted: #9ca3af;
    --accent: #00d9ff;
    --accent-secondary: #ff006e;
    --border: rgba(255, 255, 255, 0.08);
    --btn-bg: linear-gradient(135deg, #00d9ff 0%, #0099cc 100%);
    --btn-text: #000;
    --bg-dark: #0a0e27;
    --bg-darker: #050810;
    --glass-light: rgba(255, 255, 255, 0.05);
    --glass-medium: rgba(255, 255, 255, 0.1);
}

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

html, body {
    width: 100%;
    height: auto;
    color: var(--text);
    font-family: 'Inter', -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-darker) 0%, #1a1f3a 50%, var(--bg-dark) 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    position: relative;
    scroll-padding-top: 100px;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 0, 110, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

body > * {
    position: relative;
    z-index: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 16px;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent) 0%, var(--text) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.8rem;
}

p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 20px;
}

a {
    color: var(--text);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
    color: var(--accent);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    background: var(--btn-bg);
    color: var(--btn-text);
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: translateX(-100%);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0, 217, 255, 0.3);
    filter: brightness(1.1);
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    background: var(--glass-light);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 10px 16px;
    backdrop-filter: blur(20px);
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.nav a {
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 10px;
    padding: 10px 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav a:hover {
    background: var(--glass-medium);
    color: var(--accent);
}

.nav a.active {
    background: var(--glass-medium);
    color: var(--accent);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(0, 217, 255, 0.6);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}