:root {
    --bg: #f5f6fa;
    --surface: #ffffff;
    --primary: #1565c0;
    --primary-700: #0d47a1;
    --text: #1f2937;
    --muted: #4b5563;
    --border: #e5e7eb;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-2: 0 6px 18px rgba(0, 0, 0, 0.12);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: "Roboto", "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

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

a:hover {
    text-decoration: underline;
}

.app-bar {
    background: linear-gradient(135deg, var(--primary-700), var(--primary));
    color: #ffffff;
    box-shadow: var(--shadow-2);
}

.app-bar-inner {
    max-width: 920px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.72rem;
    color: #ffffff;
    text-decoration: none;
}

.brand:hover {
    text-decoration: none;
}

.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.15);
    padding: 4px;
    object-fit: contain;
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 0.04rem;
}

.brand-title {
    font-size: 1.03rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.brand-subtitle {
    font-size: 0.8rem;
    opacity: 0.9;
}

.nav {
    display: flex;
    gap: 0.45rem;
}

.nav a {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    padding: 0.34rem 0.72rem;
    font-weight: 500;
    opacity: 0.98;
}

.nav a:hover {
    opacity: 1;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.2);
}

main {
    max-width: 920px;
    margin: 1.25rem auto 2rem;
    padding: 0 1rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-1);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

h1,
h2,
h3 {
    margin-top: 0;
    line-height: 1.3;
}

h1 {
    font-size: 1.7rem;
    margin-bottom: 0.75rem;
}

h2 {
    font-size: 1.25rem;
    margin-bottom: 0.45rem;
}

ul {
    margin-top: 0.4rem;
}

.hero-actions {
    margin-top: 1rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.button {
    display: inline-block;
    border-radius: 999px;
    padding: 0.52rem 0.9rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.button-primary {
    background: var(--primary);
    color: #ffffff;
}

.button-primary:hover {
    background: var(--primary-700);
    text-decoration: none;
}

.button-secondary {
    background: #ffffff;
    color: var(--primary);
    border-color: var(--primary);
}

.button-secondary:hover {
    text-decoration: none;
    background: #f3f8ff;
}

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

footer {
    max-width: 920px;
    margin: 0 auto 1.75rem;
    padding: 0 1rem;
    color: var(--muted);
    font-size: 0.95rem;
}

@media (max-width: 700px) {
    .app-bar-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .brand-title {
        font-size: 1rem;
    }
}