:root {
    --bg-dark: #03050a;
    --accent: #00c3ff;
    --accent-hover: #00a8cc;
    --secondary: #002aff;
    --text-main: #ffffff;
    --text-sub: #94a3b8;
    --card-bg: rgba(15, 23, 42, 0.6);
    --border: rgba(255, 255, 255, 0.08);
    --glass: rgba(255, 255, 255, 0.03);
    --glow: 0 0 25px rgba(0, 195, 255, 0.25);
    --font-main: 'Inter', sans-serif;
    --font-accent: 'Outfit', sans-serif;
    --radius-lg: 24px;
    --radius-md: 14px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-main);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    background-image:
        radial-gradient(circle at 0% 0%, rgba(0, 195, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 100% 100%, rgba(0, 42, 255, 0.05) 0%, transparent 40%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 100px;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* Typography System */
.hero-title {
    font-size: clamp(32px, 8vw, 64px);
    font-weight: 800;
    font-family: var(--font-accent);
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-title span {
    color: var(--accent);
    -webkit-text-fill-color: var(--accent);
    text-shadow: 0 0 30px rgba(0, 195, 255, 0.3);
}

.hero-desc {
    display: block;
    font-size: 18px;
    color: var(--text-sub);
    max-width: 800px;
    margin-bottom: 40px;
}

.section-hero .hero-title,
.section-hero .hero-desc {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

/* Glassmorphic Components */
.card-premium {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(20px);
    transition: var(--transition);
    height: 100%;
}

.card-premium:hover {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Button System */
.btn-primary {
    background: var(--accent);
    color: #000;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-weight: 800;
    font-size: 16px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
    box-shadow: var(--glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    filter: brightness(1.1);
    box-shadow: 0 15px 30px rgba(0, 195, 255, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--border);
    cursor: pointer;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-sub);
}

.btn-auth {
    background: rgba(255, 255, 255, 0.03);
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 14px;
    border: 1px solid var(--border);
    cursor: pointer;
}

.btn-auth:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 95%;
    max-width: 1000px;
    padding: 12px 24px;
    background: rgba(11, 13, 22, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 2000;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 22px;
    font-weight: 800;
    font-family: var(--font-accent);
    color: white;
}

.logo-img {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    margin-right: 12px;
    border: 2px solid var(--accent);
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-link {
    color: var(--text-sub);
    font-weight: 600;
    font-size: 14px;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
}

.btn-nav {
    background: var(--accent);
    color: #000;
    padding: 8px 18px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 13px;
}

/* Forms */
input,
textarea,
select {
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 18px;
    color: white;
    font-size: 15px;
    outline: none;
    transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent);
    background: rgba(0, 0, 0, 0.6);
    box-shadow: 0 0 0 4px rgba(0, 195, 255, 0.1);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-up {
    animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

.delay-4 {
    animation-delay: 0.4s;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.section-hero {
    padding: 80px 0;
    text-align: center;
}

.footer {
    background: #05060b;
    padding: 80px 40px 40px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
}

.footer-link {
    color: var(--text-sub);
    margin-bottom: 12px;
    display: block;
    font-size: 15px;
}

.footer-link:hover {
    color: var(--accent);
}

/* Mobile Responsive Enhancements */
@media (max-width: 900px) {
    body {
        padding-top: 80px;
    }

    .navbar {
        width: 95%;
        border-radius: 20px;
        top: 10px;
        padding: 10px 15px;
    }

    .nav-links {
        display: none;
        /* Hidden by default on mobile */
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(11, 13, 22, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        border-radius: 20px;
        border: 1px solid var(--border);
        margin-top: 10px;
        gap: 15px;
        z-index: 1000;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        display: flex;
        text-align: center;
    }

    .nav-link {
        font-size: 16px;
        padding: 10px;
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* Move Auth/Dev buttons into the mobile menu or simplify bar */
    .navbar>div:last-child {
        gap: 10px;
    }

    /* Hide text-heavy auth elements on mobile bar to prevent overlap */
    #auth-user-display,
    #btn-nav-dev {
        display: none !important;
    }

    /* We can reinject these into the mobile menu via JS if needed, 
       but for now, preventing overlap is priority. 
       Users can login/logout via the main buttons which remain. */

    .menu-toggle {
        display: flex !important;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 10px;
        z-index: 2001;
        margin-left: 10px;
    }

    .menu-toggle span {
        width: 25px;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: 0.3s;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .footer-grid div {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-grid p {
        margin: 0 auto;
    }

    .section-hero {
        padding: 40px 0;
    }
}

.menu-toggle {
    display: none;
}

.mobile-only {
    display: none !important;
}

@media (max-width: 900px) {
    .mobile-only {
        display: block !important;
    }
}

/* Sidebar Scroll Fix */
.right-sidebar {
    overflow-y: auto;
    max-height: 100vh;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}