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

:root {
    --primary: #635bff;
    --primary-dark: #5148e5;
    --text: #172033;
    --muted: #697386;
    --background: #f7f8fc;
    --white: #ffffff;
    --border: #e8eaf0;
    --shadow: 0 20px 60px rgba(31, 35, 64, 0.10);
}

body {
    font-family:
        Inter,
        Arial,
        Helvetica,
        sans-serif;

    color: var(--text);
    background: var(--background);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

button,
input {
    font: inherit;
}

.container {
    width: min(1150px, 92%);
    margin: auto;
}

.site-header {
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(15px);
}

.nav-container {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 25px;
    font-weight: 800;
}

.logo span {
    color: var(--primary);
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    color: var(--muted);
    font-weight: 600;
}

nav a:hover {
    color: var(--primary);
}

.section {
    padding: 90px 0;
}

.section-heading {
    text-align: center;
    margin-bottom: 45px;
}

.section-heading span {
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
}

.section-heading h2 {
    font-size: 38px;
    margin: 8px 0;
}

.section-heading p {
    color: var(--muted);
}

.primary-button {
    display: inline-block;
    padding: 13px 22px;
    border-radius: 12px;
    background: var(--primary);
    color: white;
    font-weight: 700;
}

.primary-button:hover {
    background: var(--primary-dark);
}

.footer {
    padding: 50px 0;
    background: #111527;
    color: white;
    text-align: center;
}

.footer p {
    color: #aeb5c8;
    margin-top: 8px;
}

.error-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    text-align: center;
}

.error-page h1 {
    font-size: 100px;
    color: var(--primary);
}