/* ─── Reset + Variablen ─── */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #8BDBB3;
    --primary-hover: #6ecb9f;
    --secondary: #4ECDC4;
    --accent: #FFE66D;
    --dark: #1d1d1f;
    --gray: #86868b;
    --light-gray: #f5f5f7;
    --white: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display', 'Segoe UI', sans-serif;
    color: var(--dark);
    line-height: 1.47059;
    font-size: 17px;
    letter-spacing: -0.022em;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ─── Navigation ─── */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(139, 219, 179, 0.72);
    backdrop-filter: saturate(200%) blur(24px);
    -webkit-backdrop-filter: saturate(200%) blur(24px);
    z-index: 9999;
    border-bottom: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow: 0 1px 0 rgba(0,0,0,0.07), 0 4px 20px rgba(0,0,0,0.04);
}

.nav-content {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 22px;
    height: 56px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { text-decoration: none; }
.logo img { height: 28px; width: auto; max-width: 200px; display: block; }

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}
.nav-links a {
    color: var(--dark);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    opacity: 0.72;
    transition: opacity 0.2s;
}
.nav-links a:hover, .nav-links a.active { opacity: 1; }

/* ─── Hamburger Button ─── */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    min-width: 44px;
    min-height: 44px;
    background-color: transparent;
    border: none;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    border-radius: 8px;
}
.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: #1d1d1f;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.25s ease;
    transform-origin: center;
    flex-shrink: 0;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Mobile Navigation Overlay ─── */
.mobile-nav {
    position: fixed;
    top: 56px;
    left: 0; right: 0; bottom: 0;
    z-index: 9997;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    background: rgba(139, 219, 179, 0.92);
    backdrop-filter: saturate(180%) blur(32px);
    -webkit-backdrop-filter: saturate(180%) blur(32px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}
.mobile-nav.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}
.mobile-nav a {
    color: #1d1d1f;
    text-decoration: none;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.03em;
    opacity: 0.85;
    transition: opacity 0.2s;
}
.mobile-nav a:hover, .mobile-nav a:active { opacity: 1; }

/* ─── Hero Section ─── */
.hero {
    margin-top: 56px;
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 90px 24px 120px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 200%; height: 100%;
    background:
        radial-gradient(circle at 50% -8%, rgba(139,219,179,0.22), transparent 55%),
        radial-gradient(circle at 78% 72%, rgba(78,205,196,0.08), transparent 35%);
}
.hero-content {
    max-width: 820px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.hero-eyebrow {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 24px;
    background: rgba(139, 219, 179, 0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(139, 219, 179, 0.28);
    border-radius: 100px;
    padding: 5px 16px;
}
.hero h1 {
    font-size: 64px;
    line-height: 1.05;
    font-weight: 700;
    letter-spacing: -0.035em;
    margin-bottom: 20px;
}
.hero p {
    font-size: 21px;
    line-height: 1.52;
    font-weight: 400;
    letter-spacing: -0.01em;
    color: rgba(255,255,255,0.7);
    margin-bottom: 36px;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
}
.hero-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

/* ─── Buttons ─── */
.btn {
    padding: 14px 28px;
    border-radius: 980px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.25s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}
.btn-primary { background: var(--primary); color: var(--dark); font-weight: 600; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(139,219,179,0.4); }
.btn-secondary { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-secondary:hover { background: var(--primary); color: var(--dark); }
.btn-soon { background: transparent; color: var(--gray); border: 1px solid rgba(134,134,139,0.35); cursor: default; }

/* ─── Sections ─── */
section { padding: 100px 24px; }
.section-light { background: linear-gradient(165deg, #f0fbf6 0%, var(--white) 55%); }
.section-dark { background: var(--light-gray); }
.container { max-width: 980px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 64px; }

.section-eyebrow {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 12px;
}
.section-title {
    font-size: 48px;
    line-height: 1.06;
    font-weight: 700;
    letter-spacing: -0.028em;
    color: var(--dark);
    margin-bottom: 14px;
}
.section-description {
    font-size: 19px;
    line-height: 1.5;
    font-weight: 400;
    color: var(--gray);
    max-width: 560px;
    margin: 0 auto;
}

/* ─── Feature Cards (Liquid Glass) ─── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.feature-card {
    text-align: center;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.95);
    border-radius: 24px;
    padding: 44px 28px;
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.9),
        0 4px 28px rgba(139,219,179,0.1),
        0 1px 4px rgba(0,0,0,0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.9),
        0 20px 52px rgba(139,219,179,0.22),
        0 4px 12px rgba(0,0,0,0.08);
}
.feature-icon { font-size: 56px; margin-bottom: 20px; display: block; }
.feature-title { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--dark); letter-spacing: -0.02em; }
.feature-description { font-size: 15px; line-height: 1.65; color: var(--gray); }

/* ─── Two Column Layout ─── */
.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.two-column.reverse { direction: rtl; }
.two-column.reverse > * { direction: ltr; }

.column-text h2 { font-size: 40px; line-height: 1.1; font-weight: 700; letter-spacing: -0.025em; margin-bottom: 16px; }
.column-text h3 { font-size: 24px; line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 8px; }
.column-text p { font-size: 18px; line-height: 1.65; color: var(--gray); margin-bottom: 20px; }
.column-text ul { list-style: none; margin-bottom: 32px; }
.column-text li {
    font-size: 16px;
    line-height: 1.5;
    color: var(--gray);
    padding: 10px 0 10px 28px;
    position: relative;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}
.column-text li:last-child { border-bottom: none; }
.column-text li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

/* ─── YouTube Section ─── */
.youtube-visual {
    background: #111;
    border-radius: 20px;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 24px 64px rgba(0,0,0,0.25);
}
.youtube-visual::before {
    content: '';
    position: absolute;
    width: 100%; height: 100%;
    background: radial-gradient(circle at center, rgba(139,219,179,0.12), transparent 65%);
}
.youtube-play { font-size: 64px; color: var(--primary); position: relative; z-index: 1; }

/* ─── App Section ─── */
.app-section { background: var(--dark); color: var(--white); }
.app-section .column-text h2 { color: var(--white); }
.app-section .column-text p { color: rgba(255,255,255,0.65); }
.app-section .column-text li { color: rgba(255,255,255,0.65); border-bottom-color: rgba(255,255,255,0.06); }
.app-section .column-text li::before { color: var(--primary); }
.app-mockup {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 36px;
    max-width: 280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 0 80px rgba(139,219,179,0.08), 0 24px 60px rgba(0,0,0,0.35);
    padding: 20px;
}
.app-mockup img { width: 100%; height: auto; border-radius: 20px; }
.download-buttons { display: flex; gap: 12px; flex-wrap: wrap; }

/* ─── Blog Section ─── */
.blog-section { background: var(--light-gray); padding: 100px 24px; }
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 0;
}
.blog-card {
    background: var(--white);
    border-radius: 18px;
    overflow: hidden;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.blog-card:hover { transform: translateY(-5px); box-shadow: 0 20px 48px rgba(0,0,0,0.1), 0 0 0 1px rgba(139,219,179,0.15); }
.blog-card-accent { height: 4px; background: linear-gradient(90deg, var(--primary), var(--secondary)); }
.blog-card-body { padding: 24px 24px 28px; flex: 1; display: flex; flex-direction: column; }
.blog-card-cat { font-size: 10px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--primary); margin-bottom: 10px; display: block; }
.blog-card-title { font-size: 17px; font-weight: 700; color: var(--dark); line-height: 1.35; margin-bottom: 10px; letter-spacing: -0.01em; }
.blog-card-desc { font-size: 14px; line-height: 1.65; color: var(--gray); flex: 1; margin-bottom: 20px; }
.blog-card-footer { display: flex; align-items: center; justify-content: space-between; }
.blog-card-read { font-size: 13px; color: var(--gray); }
.blog-card-link { font-size: 13px; font-weight: 600; color: var(--primary); }
.blog-card-link::after { content: ' →'; }

.blog-card.featured { grid-column: span 2; flex-direction: row; }
.blog-card.featured .blog-card-accent { width: 4px; height: auto; }
.blog-card.featured .blog-card-body { padding: 36px 36px 36px 32px; }
.blog-card.featured .blog-card-title { font-size: 22px; }
.blog-card.featured .blog-card-desc { font-size: 15px; }
.blog-section-footer { text-align: center; margin-top: 44px; }

/* ─── Footer ─── */
footer {
    background: var(--dark);
    padding: 56px 24px 28px;
}
.footer-content { max-width: 980px; margin: 0 auto; }
.footer-sections {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}
.footer-section h3 {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.35);
}
.footer-section ul { list-style: none; }
.footer-section li { margin-bottom: 10px; }
.footer-section a { font-size: 14px; color: rgba(255,255,255,0.6); text-decoration: none; transition: color 0.2s; }
.footer-section a:hover { color: var(--white); }
.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
    text-align: center;
    font-size: 12px;
    color: rgba(255,255,255,0.3);
}

/* ─── Responsive: Tablet ─── */
@media (max-width: 1068px) {
    .nav-content { max-width: 692px; }
    .hero h1 { font-size: 52px; }
    .section-title { font-size: 40px; }
    .features-grid { gap: 16px; }
}

/* ─── Responsive: Mobile ─── */
@media (max-width: 734px) {
    /* Nav */
    .nav-links { display: none; }
    .nav-hamburger { display: flex; }

    /* Hero */
    .hero { padding: 64px 20px 88px; }
    .hero h1 { font-size: 36px; }
    .hero p { font-size: 17px; }
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-buttons .btn { text-align: center; }

    /* Sections */
    section { padding: 72px 20px; }
    .section-title { font-size: 30px; letter-spacing: -0.02em; }
    .section-description { font-size: 16px; }
    .section-header { margin-bottom: 48px; }

    /* Feature Cards */
    .features-grid { grid-template-columns: 1fr; gap: 14px; }
    .feature-card { padding: 32px 24px; border-radius: 20px; }

    /* Two Column */
    .two-column { grid-template-columns: 1fr; gap: 36px; }
    .two-column.reverse { direction: ltr; }
    .column-text h2 { font-size: 28px; }
    .column-text p { font-size: 16px; }

    /* App */
    .app-mockup { max-width: 200px; }
    .download-buttons { flex-direction: column; align-items: stretch; }
    .download-buttons .btn { text-align: center; }

    /* Blog */
    .blog-section { padding: 72px 20px; }
    .blog-grid { grid-template-columns: 1fr; gap: 14px; }
    .blog-card.featured { grid-column: span 1; flex-direction: column; }
    .blog-card.featured .blog-card-accent { width: auto; height: 4px; }
    .blog-card.featured .blog-card-body { padding: 24px; }
    .blog-card.featured .blog-card-title { font-size: 18px; }

    /* Footer */
    .footer-sections { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 30px; }
    .hero p { font-size: 15px; }
    .footer-sections { grid-template-columns: 1fr; gap: 28px; }
    .features-grid { gap: 12px; }
}