:root {
    --bg: #f5f5f7;
    --surface: #ffffff;
    --text: #1d1d1f;
    --muted: #6e6e73;
    --border: #d2d2d7;
    --accent: #1d1d1f;
    --accent-hover: #000000;
    --accent-contrast: #ffffff;
    --radius: 18px;
    --radius-lg: 24px;
    --shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
    --container: 1200px;
    --section-y: clamp(60px, 8vw, 110px);
    --header-h: 64px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

main {
    padding-top: var(--header-h);
}

h1, h2, h3 {
    letter-spacing: -0.02em;
    color: var(--text);
}

h1 {
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    font-weight: 600;
}

h2 {
    font-size: clamp(1.6rem, 3.6vw, 2.4rem);
    font-weight: 600;
}

h3 {
    font-size: clamp(1.2rem, 2.6vw, 1.5rem);
    font-weight: 600;
}

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

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

a:hover {
    color: var(--accent-hover);
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-y) 20px;
}

.card {
    background-color: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.cta-button,
.app-store-button,
.award-link,
.see-more-button,
.submit-button,
.back-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: var(--accent);
    color: var(--accent-contrast);
    padding: 12px 24px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.cta-button:hover,
.app-store-button:hover,
.award-link:hover,
.see-more-button:hover,
.submit-button:hover,
.back-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.cta-button:active,
.app-store-button:active,
.award-link:active,
.see-more-button:active,
.submit-button:active,
.back-button:active {
    transform: translateY(0);
}

.desktop-header {
    background-color: rgba(255, 255, 255, 0.84);
    backdrop-filter: saturate(180%) blur(20px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.desktop-header nav {
    max-width: var(--container);
    margin: 0 auto;
    padding: 12px 20px;
    min-height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-items a {
    color: var(--muted);
}

.nav-items a:hover {
    color: var(--text);
}

footer {
    text-align: center;
    padding: 30px 20px;
    background-color: var(--bg);
    color: var(--muted);
    font-size: 12px;
    border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
    main {
        padding-top: 56px;
    }
}