:root {
    --bg-main: #080e19;
    --bg-header: rgba(8, 14, 25, 0.8);
    --bg-card: #0d1525;
    --text-main: #ffffff;
    --text-muted: #94a3b8; /* slate-400 */
    --accent: #06b6d4; /* cyan-500 */
    --accent-hover: #0891b2; /* cyan-600 */
    --accent-glow: rgba(6, 182, 212, 0.2);
    --border: #1e293b; /* slate-800 */
    
    --error-bg: rgba(220, 38, 38, 0.1);
    --error-text: #f87171;
    --error-border: #991b1b;
    --success-bg: rgba(22, 163, 74, 0.1);
    --success-text: #4ade80;
    --success-border: #166534;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Grid background */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -2;
    background-image: 
        linear-gradient(to right, rgba(6, 182, 212, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(6, 182, 212, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at center, black, transparent 80%);
}

.glow-bg {
    position: fixed;
    top: -20vh;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 80vh;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
    z-index: -1;
    pointer-events: none;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background-color: var(--bg-header);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 100;
}

.header-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.header-logo img {
    height: 36px;
    width: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
}

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

.btn-outline:hover {
    border-color: var(--text-muted);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Utilities */
.text-cyan {
    color: var(--accent);
}

.text-muted {
    color: var(--text-muted);
}