@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
    --bg-0: #10232d;
    --bg-1: #2a5060;
    --bg-2: #6f838c;
    --panel: rgba(22, 43, 52, 0.84);
    --border: rgba(176, 186, 192, 0.42);
    --text: #f6f3ed;
    --text-soft: rgba(246, 243, 237, 0.78);
    --text-muted: rgba(246, 243, 237, 0.56);
    --accent: #7ec850;
    --accent-strong: #64b5f6;
    --danger: #b90000;
    --surface-1: rgba(20, 39, 48, 0.78);
    --surface-2: rgba(23, 46, 57, 0.9);
    --surface-3: rgba(30, 58, 70, 0.96);
    --shadow-1: 0 6px 16px rgba(0, 0, 0, 0.2);
    --shadow-2: 0 12px 30px rgba(0, 0, 0, 0.26);
    --ring: 0 0 0 3px rgba(126, 200, 80, 0.35);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --sans: "Space Grotesk", "Trebuchet MS", sans-serif;
    --mono: "IBM Plex Mono", "Consolas", monospace;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(126, 200, 80, 0.2), transparent 32%),
        radial-gradient(circle at top right, rgba(100, 181, 246, 0.12), transparent 26%),
        linear-gradient(140deg, var(--bg-0), var(--bg-1) 42%, var(--bg-2));
    background-attachment: fixed;
    color: var(--text);
    font-family: var(--sans);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--surface-2);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-1);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-logo {
    height: 28px;
    width: auto;
    display: block;
}

.nav-link {
    color: var(--text-soft);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    transition: color 0.2s, background-color 0.2s;
}

.nav-link:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
    color: var(--accent);
}

.login-btn {
    background: var(--surface-3);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    box-shadow: var(--shadow-1);
    transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.login-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(160, 211, 225, 0.3);
    transform: translateY(-1px);
}

.login-btn svg {
    width: 22px;
    height: 22px;
    fill: var(--text-soft);
}

.footer-content {
    text-align: center;
}

.hero-section,
.features-section {
    max-width: 980px;
    margin: 2rem auto 0;
    padding: 0 1rem;
}

.hero-section {
    background: var(--surface-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
    padding: 2rem 1.5rem;
}

.hero-section h1 {
    margin: 0.35rem 0 0.9rem;
    font-size: clamp(1.45rem, 3.3vw, 2.2rem);
    line-height: 1.2;
}

.about-logo {
    display: block;
    margin: 0 auto 1rem;
    width: auto;
}

.subtitle {
    margin: 0;
    color: var(--text-soft);
}

.hero-actions {
    margin-top: 1rem;
}

.btn {
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    padding: 0.625rem 1rem;
    font: inherit;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.btn:focus-visible,
.nav-link:focus-visible,
.login-btn:focus-visible {
    outline: none;
    box-shadow: var(--ring);
}

.btn-primary {
    background: var(--accent);
    color: #1f1d1a;
    box-shadow: var(--shadow-1);
}

.btn-primary:hover {
    background: #98d96e;
    transform: translateY(-1px);
}

.features-grid {
    display: grid;
    gap: 1rem;
}

.home-banner {
    display: block;
    margin: 10px auto;
    width: auto;
    border-radius: 15px;
}

.feature-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-1);
    padding: 1rem;
}