/* --- Global Styles & Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

:root {
    --bg-primary: #000000;
    --bg-secondary: #0f0f0f;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --border-primary: #262626;
    --glass-bg: rgba(26, 26, 26, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
    z-index: -1;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.logo {
    height: 40px;
    filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.8));
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo:hover {
    transform: scale(1.15);
}

.top-bar nav {
    display: flex;
    gap: 16px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    border: 1px solid transparent;
    cursor: pointer;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

.nav-link.active {
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
}

.page-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow-y: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.page-container::-webkit-scrollbar {
    display: none;
}

.page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100%;
    padding: 120px 20px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.hidden {
    display: none !important;
}