:root {
    --zen-bg: #FFFFFF;
    --zen-text: #1D1D1F;
    --zen-text-dim: #86868B;
    --zen-accent: #0071E3;
    --zen-border: #D2D2D7;
    --zen-card-bg: #F5F5F7;
    --zen-shadow: 0 4px 24px rgba(0,0,0,0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Myriad Set Pro", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body {
    background: var(--zen-bg);
    color: var(--zen-text);
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 22px;
}

/* Header */
.zen-header {
    height: 52px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    position: sticky;
    top: 0;
    z-index: 9999;
    border-bottom: 1px solid var(--zen-border);
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.zen-logo {
    font-size: 19px;
    font-weight: 600;
    text-decoration: none;
    color: var(--zen-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--zen-text-dim);
    font-size: 12px;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    padding: 100px 0;
    text-align: center;
}

.hero-h1 {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.07143;
    margin-bottom: 12px;
}

.hero-h2 {
    font-size: 28px;
    font-weight: 400;
    letter-spacing: 0.007em;
    margin-bottom: 28px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-link {
    text-decoration: none;
    color: var(--zen-accent);
    font-size: 21px;
    font-weight: 400;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-link:hover {
    text-decoration: underline;
}

/* Feature Grid (Apple Style) */
.feature-section {
    padding: 80px 0;
    background: var(--zen-card-bg);
}

.zen-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.zen-card {
    background: var(--zen-bg);
    padding: 60px;
    border-radius: 28px;
    text-align: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.25, 1);
    cursor: pointer;
    overflow: hidden;
    position: relative;
}

.zen-card:hover {
    transform: scale(1.01);
}

.card-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 10px;
    display: block;
}

.card-h3 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 15px;
}

.card-p {
    font-size: 17px;
    color: var(--zen-text-dim);
    max-width: 300px;
    margin: 0 auto;
}

/* Showcase Image Placeholder */
.showcase-box {
    margin-top: 40px;
    width: 100%;
    height: 200px;
    background: #F2F2F2;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}

/* Download Section on Landing */
.zen-download-section {
    padding: 120px 0;
    text-align: center;
}

.zen-dl-module {
    background: var(--zen-card-bg);
    border-radius: 32px;
    padding: 80px 40px;
    margin-top: 40px;
}

.zen-dl-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.zen-dl-card {
    background: var(--zen-bg);
    padding: 40px;
    border-radius: 24px;
    transition: transform 0.3s ease;
    border: 1px solid transparent;
}

.zen-dl-card:hover {
    transform: translateY(-5px);
    border-color: var(--zen-border);
}

.zen-dl-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.zen-dl-h4 {
    font-size: 21px;
    font-weight: 600;
    margin-bottom: 12px;
}

.zen-dl-p {
    font-size: 14px;
    color: var(--zen-text-dim);
    margin-bottom: 24px;
}

.zen-dl-btn {
    display: inline-block;
    padding: 10px 24px;
    background: var(--zen-text);
    color: white;
    border-radius: 100px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.3s;
}

.zen-dl-btn:hover {
    background: #424245;
}

/* Footer */
.zen-footer {
    padding: 60px 0;
    background: var(--zen-card-bg);
    color: var(--zen-text-dim);
    font-size: 12px;
}

.footer-top {
    border-bottom: 1px solid var(--zen-border);
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
}

/* Download Page */
.dl-hero {
    padding: 80px 0;
    text-align: center;
}

.dl-platform-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.dl-item {
    padding: 40px;
    border-radius: 24px;
    background: var(--zen-card-bg);
    text-align: center;
}

.dl-btn {
    display: inline-block;
    background: var(--zen-text);
    color: white;
    padding: 12px 24px;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 20px;
    transition: opacity 0.3s;
}

.dl-btn:hover {
    opacity: 0.8;
}

@media (max-width: 734px) {
    .hero-h1 { font-size: 40px; }
    .zen-grid { grid-template-columns: 1fr; }
    .dl-platform-grid { grid-template-columns: 1fr; }
}