/* ========================================
   RESET & ROOT
   ======================================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --blue:       #1a73e8;
    --blue-dark:  #1557b0;
    --blue-light: #e8f0fe;
    --green:      #1e8e3e;
    --yellow:     #f9ab00;
    --red:        #d93025;
    --ink:        #202124;
    --ink-2:      #3c4043;
    --ink-3:      #5f6368;
    --ink-4:      #9aa0a6;
    --surface:    #ffffff;
    --surface-2:  #f8f9fa;
    --surface-3:  #f1f3f4;
    --border:     #dadce0;
    --radius-s:   6px;
    --radius-m:   12px;
    --radius-l:   20px;
    --radius-xl:  28px;
    --shadow-1:   0 1px 2px rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
    --shadow-2:   0 1px 2px rgba(60,64,67,.3), 0 2px 6px 2px rgba(60,64,67,.15);
    --shadow-3:   0 4px 8px 3px rgba(60,64,67,.15), 0 1px 3px rgba(60,64,67,.3);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    font-size: 16px; line-height: 1.5;
    color: var(--ink); background: var(--surface);
    -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }
.wrap { max-width: 1152px; margin: 0 auto; padding: 0 24px; }

/* ── NAV ── */
.nav {
    position: sticky; top: 0; z-index: 100; height: 64px;
    background: #fff; border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1152px; margin: 0 auto; padding: 0 24px;
    height: 100%; display: flex; align-items: center;
}
.nav-brand {
    display: flex; align-items: center; gap: 10px;
    font-size: 18px; font-weight: 700; color: var(--ink);
    margin-right: auto; text-decoration: none;
}
.nav-brand:hover { text-decoration: none; }
.nav-links { display: flex; list-style: none; gap: 4px; margin-right: 16px; }
.nav-links a {
    display: block; padding: 8px 16px; border-radius: 24px;
    font-size: 14px; font-weight: 500; color: var(--ink-3);
    transition: background .15s, color .15s; text-decoration: none;
}
.nav-links a:hover { background: var(--surface-3); color: var(--ink); }
.nav-links a.active { background: var(--blue-light); color: var(--blue); font-weight: 600; }
.nav-cta {
    height: 36px; padding: 0 20px; background: var(--blue); color: #fff;
    border-radius: 24px; font-size: 14px; font-weight: 600;
    transition: background .15s, box-shadow .15s;
}
.nav-cta:hover { background: var(--blue-dark); box-shadow: var(--shadow-1); }

/* ── HERO ── */
.hero {
    background: linear-gradient(150deg, #0d47a1 0%, #1565c0 40%, #1976d2 70%, #1e88e5 100%);
    color: #fff; padding: 88px 0 80px; position: relative; overflow: hidden;
}
.hero::after {
    content: ''; position: absolute; bottom: -1px; left: 0; right: 0; height: 52px;
    background: var(--surface); clip-path: ellipse(56% 100% at 50% 100%);
}
.hero-inner {
    max-width: 1152px; margin: 0 auto; padding: 0 24px;
    display: grid; grid-template-columns: 1fr 420px; gap: 64px; align-items: center;
}
.hero-label {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3);
    border-radius: 24px; padding: 6px 14px; font-size: 13px; font-weight: 500;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: 54px; font-weight: 700; line-height: 1.12;
    letter-spacing: -.6px; margin-bottom: 22px;
}
.hero-sub {
    font-size: 18px; line-height: 1.65; color: rgba(255,255,255,.85);
    margin-bottom: 36px; max-width: 500px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 44px; }
.btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    height: 52px; padding: 0 28px;
    background: #fff; color: var(--blue);
    border-radius: 26px; font-size: 15px; font-weight: 700;
    box-shadow: 0 2px 8px rgba(0,0,0,.25);
    transition: box-shadow .2s, transform .2s;
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(0,0,0,.3); transform: translateY(-2px); text-decoration: none; }
.btn-ghost {
    display: inline-flex; align-items: center; gap: 8px;
    height: 52px; padding: 0 24px;
    background: rgba(255,255,255,.12); border: 1.5px solid rgba(255,255,255,.45);
    color: #fff; border-radius: 26px; font-size: 15px; font-weight: 500;
    transition: background .2s;
}
.btn-ghost:hover { background: rgba(255,255,255,.2); text-decoration: none; }
.hero-note { font-size: 13px; color: rgba(255,255,255,.55); }
.hero-stats { display: flex; gap: 36px; }
.hero-stat-num { font-size: 34px; font-weight: 700; line-height: 1; }
.hero-stat-lbl { font-size: 12px; color: rgba(255,255,255,.65); margin-top: 5px; }

/* Browser Mockup */
.mockup {
    background: #fff; border-radius: 14px;
    box-shadow: 0 28px 72px rgba(0,0,0,.4); overflow: hidden;
}
.mock-bar {
    background: #f1f3f4; padding: 10px 14px;
    display: flex; align-items: center; gap: 10px;
}
.mock-dots { display: flex; gap: 5px; }
.mock-dots span { width: 11px; height: 11px; border-radius: 50%; }
.mock-dots span:nth-child(1) { background: #ff5f57; }
.mock-dots span:nth-child(2) { background: #febc2e; }
.mock-dots span:nth-child(3) { background: #28c840; }
.mock-addr {
    flex: 1; background: #fff; border-radius: 6px;
    padding: 5px 12px; font-size: 12px; color: var(--ink-3);
    display: flex; align-items: center; gap: 6px;
}
.mock-body { padding: 20px 24px; }
.mock-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.mock-ico { width: 32px; height: 32px; border-radius: 8px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.mock-title { font-size: 14px; font-weight: 600; color: var(--ink); }
.mock-sub { font-size: 12px; color: var(--ink-4); }
.mock-bars { display: flex; flex-direction: column; gap: 9px; margin-top: 16px; }
.mock-bar-row { display: flex; align-items: center; gap: 10px; }
.mock-bar-lbl { font-size: 11px; color: var(--ink-3); width: 44px; flex-shrink: 0; }
.mock-bar-track { flex: 1; height: 8px; background: var(--surface-3); border-radius: 4px; overflow: hidden; }
.mock-bar-fill { height: 100%; border-radius: 4px; }
.mock-bar-val { font-size: 11px; color: var(--ink-3); width: 34px; text-align: right; }
.mock-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.mock-tag { padding: 3px 10px; border-radius: 12px; font-size: 11px; font-weight: 500; }
.mock-tag.b { background: var(--blue-light); color: var(--blue); }
.mock-tag.g { background: #e6f4ea; color: var(--green); }
.mock-tag.y { background: #fef9e3; color: #a06000; }

/* ── SECTION BASE ── */
.section { padding: 80px 0; }
.section-alt { background: var(--surface-2); }
.section-center { text-align: center; }
.eyebrow {
    display: inline-block; font-size: 11px; font-weight: 800;
    letter-spacing: 1.4px; text-transform: uppercase;
    color: var(--blue); margin-bottom: 10px;
}
h2.sec-title {
    font-size: 38px; font-weight: 700; letter-spacing: -.3px;
    color: var(--ink); margin-bottom: 14px; line-height: 1.2;
}
p.sec-lead { font-size: 17px; color: var(--ink-3); max-width: 600px; margin: 0 auto 52px; }

/* ── FEATURE CARDS ── */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 14px; padding: 28px;
    transition: box-shadow .2s, transform .2s, border-color .2s;
}
.card:hover { box-shadow: var(--shadow-3); transform: translateY(-3px); border-color: #b8cef0; }
.card-icon {
    width: 52px; height: 52px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.ci-b { background: var(--blue-light); }
.ci-g { background: #e6f4ea; }
.ci-y { background: #fef9e3; }
.ci-r { background: #fce8e6; }
.card h3 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 9px; }
.card p  { font-size: 14px; color: var(--ink-3); line-height: 1.65; }

/* ── PLATFORM GRID ── */
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.p-card {
    border: 2px solid var(--border); border-radius: 14px;
    padding: 28px 20px; text-align: center; transition: all .2s;
}
.p-card:hover { border-color: var(--blue); box-shadow: var(--shadow-2); }
.p-card.featured { border-color: var(--blue); background: var(--blue-light); }
.p-card .p-icon { margin: 0 auto 16px; }
.p-card h3 { font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.p-card .p-desc { font-size: 13px; color: var(--ink-3); margin-bottom: 20px; min-height: 36px; }
.btn-dl {
    display: block; width: 100%; height: 40px; line-height: 40px;
    background: var(--blue); color: #fff; border-radius: 10px;
    font-size: 14px; font-weight: 600; transition: background .15s;
}
.btn-dl:hover { background: var(--blue-dark); text-decoration: none; }

/* ── REVIEWS ── */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.review { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 24px; }
.review-stars { display: flex; gap: 3px; margin-bottom: 14px; }
.review-text { font-size: 14px; color: var(--ink-2); line-height: 1.68; margin-bottom: 18px; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700; color: #fff; flex-shrink: 0;
}
.review-name { font-size: 13px; font-weight: 600; color: var(--ink); }
.review-role { font-size: 12px; color: var(--ink-4); }

/* ── FAQ ── */
.faq-wrap { max-width: 780px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
    width: 100%; display: flex; justify-content: space-between; align-items: center;
    padding: 20px 4px; background: none; text-align: left;
    font-size: 16px; font-weight: 600; color: var(--ink); gap: 16px;
    transition: color .15s;
}
.faq-q:hover { color: var(--blue); }
.faq-q svg { flex-shrink: 0; transition: transform .25s; color: var(--ink-4); }
.faq-item.open .faq-q { color: var(--blue); }
.faq-item.open .faq-q svg { transform: rotate(180deg); color: var(--blue); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; padding: 0 4px; }
.faq-item.open .faq-a { max-height: 400px; padding-bottom: 20px; }
.faq-a p { font-size: 15px; color: var(--ink-3); line-height: 1.7; }

/* ── FOOTER ── */
.footer { background: var(--ink); color: rgba(255,255,255,.65); padding: 36px 0; text-align: center; }
.footer-safe { font-size: 14px; margin-bottom: 8px; }
.footer-copy { font-size: 12px; color: rgba(255,255,255,.4); }

/* ── DOWNLOAD PAGE ── */
.dl-hero {
    background: linear-gradient(150deg, #0d47a1 0%, #1976d2 100%);
    color: #fff; padding: 60px 0 52px; text-align: center;
}
.dl-badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3);
    border-radius: 24px; padding: 5px 14px;
    font-size: 12px; color: rgba(255,255,255,.9); margin-bottom: 16px;
}
.dl-hero h1 { font-size: 46px; font-weight: 700; letter-spacing: -.5px; margin-bottom: 12px; }
.dl-hero p  { font-size: 17px; color: rgba(255,255,255,.8); }

.dl-body { padding: 56px 0; }
.win-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-2); margin-bottom: 56px;
}
.win-card-top {
    background: linear-gradient(135deg, #1565c0, #1e88e5);
    padding: 36px 40px; display: flex; justify-content: space-between; align-items: center;
    gap: 24px; color: #fff;
}
.win-card-top h2 { font-size: 28px; font-weight: 700; margin-bottom: 6px; }
.win-card-top p  { font-size: 15px; color: rgba(255,255,255,.8); }
.btn-win-dl {
    display: inline-flex; align-items: center; gap: 10px;
    height: 52px; padding: 0 32px;
    background: #fff; color: var(--blue);
    border-radius: 26px; font-size: 15px; font-weight: 700;
    box-shadow: 0 2px 8px rgba(0,0,0,.2); flex-shrink: 0;
    transition: box-shadow .2s;
}
.btn-win-dl:hover { box-shadow: 0 6px 20px rgba(0,0,0,.25); }
.win-card-meta { padding: 24px 40px; display: flex; gap: 40px; flex-wrap: wrap; border-bottom: 1px solid var(--border); }
.win-meta-item { display: flex; align-items: center; gap: 10px; }
.win-meta-item svg { flex-shrink: 0; color: var(--blue); }
.win-meta-item strong { font-size: 13px; font-weight: 600; color: var(--ink); display: block; margin-bottom: 2px; }
.win-meta-item span  { font-size: 13px; color: var(--ink-3); }
.win-card-note { padding: 14px 40px; font-size: 12px; color: var(--ink-4); }
.win-card-note a { color: var(--blue); }

.other-h2 { font-size: 26px; font-weight: 700; color: var(--ink); margin-bottom: 24px; }
.other-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.other-card {
    border: 1px solid var(--border); border-radius: 14px;
    padding: 28px; display: flex; gap: 20px; align-items: flex-start;
    transition: box-shadow .2s, border-color .2s;
}
.other-card:hover { box-shadow: var(--shadow-2); border-color: #b8cef0; }
.other-icon { flex-shrink: 0; }
.other-card h3 { font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 4px; }
.other-card p  { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.btn-outline {
    display: inline-flex; align-items: center; gap: 6px;
    height: 36px; padding: 0 16px;
    border: 1.5px solid var(--blue); color: var(--blue);
    border-radius: 10px; font-size: 13px; font-weight: 600;
    transition: background .15s;
}
.btn-outline:hover { background: var(--blue-light); text-decoration: none; }

/* Requirements */
.req-section { padding: 56px 0; background: var(--surface-2); }
.req-section h2 { font-size: 26px; font-weight: 700; margin-bottom: 28px; }
.tabs-nav { display: flex; border-bottom: 2px solid var(--border); margin-bottom: 28px; }
.tab-btn {
    padding: 12px 24px; background: none;
    font-size: 14px; font-weight: 600; color: var(--ink-3);
    border-bottom: 2px solid transparent; margin-bottom: -2px;
    transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--ink); }
.tab-btn.active { color: var(--blue); border-bottom-color: var(--blue); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }
.req-table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-1); }
.req-table th, .req-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.req-table th { background: var(--surface-3); font-weight: 700; color: var(--ink); }
.req-table td { color: var(--ink-2); }
.req-table tr:last-child td { border-bottom: none; }

/* Install steps */
.steps-sec { padding: 56px 0; }
.steps-sec h2 { font-size: 26px; font-weight: 700; margin-bottom: 32px; }
.steps { display: flex; flex-direction: column; }
.step { display: flex; gap: 20px; position: relative; padding-bottom: 32px; }
.step:last-child { padding-bottom: 0; }
.step::before { content: ''; position: absolute; left: 19px; top: 42px; bottom: 0; width: 2px; background: var(--border); }
.step:last-child::before { display: none; }
.step-num {
    flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%;
    background: var(--blue); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 700; z-index: 1;
}
.step-body h4 { font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 6px; padding-top: 8px; }
.step-body p  { font-size: 14px; color: var(--ink-3); line-height: 1.6; }

/* ── ARTICLE PAGE ── */
.art-hero {
    background: linear-gradient(150deg, #0d47a1, #1976d2);
    color: #fff; padding: 52px 0 44px;
}
.bc { display: flex; align-items: center; gap: 6px; font-size: 13px; color: rgba(255,255,255,.65); margin-bottom: 20px; }
.bc a { color: rgba(255,255,255,.65); }
.bc a:hover { color: #fff; text-decoration: none; }
.art-hero h1 { font-size: 40px; font-weight: 700; letter-spacing: -.3px; margin-bottom: 18px; line-height: 1.2; }
.art-meta { display: flex; gap: 16px; flex-wrap: wrap; }
.art-tag {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(255,255,255,.15); border-radius: 24px;
    padding: 4px 12px; font-size: 12px; color: rgba(255,255,255,.85);
}

.art-layout { display: grid; grid-template-columns: 1fr 272px; gap: 56px; padding: 56px 0 80px; max-width: 1152px; margin: 0 auto; }
.art-layout.padded { padding-left: 24px; padding-right: 24px; }

/* Article body */
.art-body section { margin-bottom: 52px; }
.art-body h2 { font-size: 26px; font-weight: 700; color: var(--ink); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--blue-light); }
.art-body h3 { font-size: 19px; font-weight: 700; color: var(--ink); margin: 24px 0 10px; }
.art-body h4 { font-size: 16px; font-weight: 700; color: var(--ink); margin: 18px 0 8px; }
.art-body p  { font-size: 15px; color: var(--ink-2); line-height: 1.8; margin-bottom: 14px; }
.art-body ul { margin: 10px 0 14px 22px; }
.art-body li { font-size: 15px; color: var(--ink-2); line-height: 1.7; margin-bottom: 6px; }
.art-body strong { color: var(--ink); }
.art-body a { color: var(--blue); }

.callout {
    display: flex; gap: 14px; align-items: flex-start;
    background: var(--blue-light); border-left: 4px solid var(--blue);
    border-radius: 0 8px 8px 0; padding: 16px 18px; margin: 20px 0;
}
.callout svg { flex-shrink: 0; margin-top: 2px; }
.callout-body strong { font-size: 14px; color: var(--ink); display: block; margin-bottom: 4px; }
.callout-body p { font-size: 14px; color: var(--ink-2); margin: 0; line-height: 1.6; }

.cmp-wrap { overflow-x: auto; margin: 20px 0; }
.cmp-table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-1); }
.cmp-table th, .cmp-table td { padding: 13px 16px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border); }
.cmp-table th { background: var(--surface-3); font-weight: 700; color: var(--ink); }
.cmp-table .best { color: var(--green); font-weight: 700; }
.cmp-table .good { color: var(--blue); }
.cmp-table .avg  { color: var(--ink-3); }
.cmp-table tr:last-child td { border-bottom: none; }

.ver-list { display: flex; flex-direction: column; margin: 20px 0; }
.ver-item { display: flex; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.ver-item:last-child { border-bottom: none; }
.ver-chip { flex-shrink: 0; background: var(--blue); color: #fff; padding: 4px 12px; border-radius: 24px; font-size: 12px; font-weight: 700; height: fit-content; white-space: nowrap; margin-top: 2px; }
.ver-body h4 { font-size: 15px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.ver-body ul { margin-left: 18px; }
.ver-body li { font-size: 14px; color: var(--ink-3); margin-bottom: 4px; line-height: 1.6; }

.tip-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 20px 0; }
.tip-card { background: var(--surface-2); border-radius: 12px; padding: 20px; border: 1px solid var(--border); }
.tip-card h4 { font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.tip-card p  { font-size: 13px; color: var(--ink-3); line-height: 1.6; margin: 0; }

.guide-steps { display: flex; flex-direction: column; margin: 20px 0; }
.guide-step { display: flex; gap: 16px; padding-bottom: 20px; position: relative; }
.guide-step:last-child { padding-bottom: 0; }
.guide-step::before { content: ''; position: absolute; left: 15px; top: 34px; bottom: 0; width: 2px; background: var(--border); }
.guide-step:last-child::before { display: none; }
.guide-num { flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%; background: var(--blue); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; z-index: 1; }
.guide-body h4 { font-size: 15px; font-weight: 700; color: var(--ink); margin-bottom: 6px; padding-top: 4px; }
.guide-body p  { font-size: 14px; color: var(--ink-3); line-height: 1.6; margin: 0; }

.art-cta {
    background: linear-gradient(135deg, #1565c0, #1e88e5);
    border-radius: 20px; padding: 44px; text-align: center; color: #fff; margin-top: 56px;
}
.art-cta h3 { font-size: 28px; font-weight: 700; margin-bottom: 10px; }
.art-cta p  { font-size: 16px; color: rgba(255,255,255,.85); margin-bottom: 24px; }
.btn-cta {
    display: inline-flex; align-items: center; gap: 8px;
    height: 50px; padding: 0 32px;
    background: #fff; color: var(--blue);
    border-radius: 26px; font-size: 15px; font-weight: 700;
    transition: box-shadow .2s;
}
.btn-cta:hover { box-shadow: 0 6px 20px rgba(0,0,0,.25); text-decoration: none; }

/* Sidebar */
.sidebar-sticky { position: sticky; top: 84px; }
.sb-box { background: var(--surface-2); border-radius: 14px; padding: 20px; margin-bottom: 20px; border: 1px solid var(--border); }
.sb-box h4 { font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 14px; }
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.toc-list a { font-size: 13px; color: var(--ink-3); padding: 5px 8px; border-radius: 6px; display: block; transition: all .15s; }
.toc-list a:hover { background: #fff; color: var(--blue); text-decoration: none; }
.toc-list a.active { background: var(--blue); color: #fff; font-weight: 600; }
.btn-sb-dl {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    width: 100%; height: 42px;
    background: var(--blue); color: #fff;
    border-radius: 10px; font-size: 14px; font-weight: 600;
    transition: background .15s;
}
.btn-sb-dl:hover { background: var(--blue-dark); }
.sb-note { font-size: 11px; color: var(--ink-4); text-align: center; margin-top: 8px; }

/* ── KEYFRAMES ── */
@keyframes spin { to { transform: rotate(360deg); } }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; }
    .mockup { display: none; }
    .cards-4 { grid-template-columns: repeat(2, 1fr); }
    .platform-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: repeat(2, 1fr); }
    .art-layout { grid-template-columns: 1fr; }
    .sidebar-sticky { position: static; }
    .tip-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .hero h1 { font-size: 36px; }
    h2.sec-title { font-size: 28px; }
    .cards-3, .cards-4 { grid-template-columns: 1fr; }
    .platform-grid { grid-template-columns: 1fr 1fr; }
    .reviews-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .other-grid { grid-template-columns: 1fr; }
    .win-card-top { flex-direction: column; align-items: flex-start; }
    .win-card-meta { gap: 20px; }
    .art-hero h1 { font-size: 28px; }
    .other-card { flex-direction: column; }
    .hero-stats { gap: 20px; }
    .dl-hero h1 { font-size: 32px; }
    .win-card-top { padding: 24px; }
    .win-card-meta { padding: 20px 24px; }
    .win-card-note { padding: 12px 24px; }
}