/* =========================================================
   FlowDesk — style.css
   Phong cách: SaaS hiện đại. Nền trắng + gradient tím-xanh, glass card,
   bo góc lớn, chữ Inter-like đậm, badge nhỏ.
   Bố cục khác các mẫu trước:
     - Header có nút "Đăng nhập" + "Dùng thử" và menu có DROPDOWN "Sản phẩm" dạng panel
     - Hero chữ giữa + MOCKUP DASHBOARD NGHIÊNG 3D (perspective) đè viền gradient
     - Logo wall xám chạy ngang
     - Tính năng dạng BENTO 6 ô lệch cỡ có mockup mini
     - "Cách hoạt động" 3 bước có đường nối cong
     - Bảng giá có TOGGLE THÁNG / NĂM (JS đổi số)
     - Tích hợp: lưới logo tròn
     - Changelog: dòng thời gian có badge phiên bản
   Ảnh: mỗi khối ảnh dùng biến --img trên thẻ HTML (đường dẫn ../images/…).
   ========================================================= */

:root{
  --ink:#0F1222;
  --text:#2A2F45;
  --muted:#6B7188;
  --line:#E6E8F0;
  --bg:#FFFFFF;
  --bg-2:#F6F7FB;
  --violet:#6D5DF6;
  --violet-deep:#5545E8;
  --violet-soft:#EEEBFF;
  --cyan:#22C1E8;
  --grad:linear-gradient(120deg,#6D5DF6 0%,#22C1E8 100%);
  --green:#16A34A;
  --radius:14px;
  --radius-lg:24px;
  --shadow:0 1px 2px rgba(15,18,34,.04), 0 12px 32px rgba(15,18,34,.08);
  --shadow-lg:0 30px 80px rgba(109,93,246,.18);
  --ph:linear-gradient(135deg,#EEEBFF 0%,#DCE8FF 55%,#CDEFFB 100%);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);font-size:15.5px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{max-width:100%;display:block}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.ph{background:var(--img,var(--ph)) center/cover no-repeat,var(--ph)}
.container{width:min(1160px,100% - 40px);margin-inline:auto}
h1,h2,h3,h4{font-weight:800;line-height:1.15;color:var(--ink);letter-spacing:-.025em}
b,strong{font-weight:600}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;font-weight:600;font-size:14.5px;transition:.2s;white-space:nowrap}
.btn svg{width:16px;height:16px}
.btn--violet{background:var(--violet);color:#fff;box-shadow:0 8px 20px rgba(109,93,246,.3)}
.btn--violet:hover{background:var(--violet-deep);transform:translateY(-1px)}
.btn--grad{background:var(--grad);color:#fff}
.btn--grad:hover{opacity:.92}
.btn--line{border:1.5px solid var(--line);color:var(--ink);background:#fff}
.btn--line:hover{border-color:var(--violet);color:var(--violet)}
.btn--ghost{color:var(--text)}
.btn--ghost:hover{background:var(--bg-2)}
.btn--lg{padding:15px 28px;font-size:16px}

/* ---------- Header + dropdown ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header__in{display:flex;align-items:center;gap:24px;min-height:68px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;color:var(--ink)}
.logo__mark{width:32px;height:32px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#fff}
.logo__mark svg{width:18px;height:18px}
.nav{display:flex;gap:2px}
.nav__item{position:relative}
.nav__link{padding:8px 12px;border-radius:8px;font-weight:500;font-size:14px;color:var(--text);display:flex;align-items:center;gap:5px}
.nav__link:hover{background:var(--bg-2)}
.nav__link svg{width:14px;height:14px;color:var(--muted)}
.drop{position:absolute;top:100%;left:0;padding-top:10px;display:none}
.nav__item:hover .drop{display:block}
.drop__in{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:12px;display:grid;grid-template-columns:repeat(2,240px);gap:4px}
.drop a{display:flex;gap:12px;padding:12px;border-radius:10px}
.drop a:hover{background:var(--bg-2)}
.drop .ic{width:36px;height:36px;border-radius:9px;background:var(--violet-soft);color:var(--violet);display:grid;place-items:center;flex:none}
.drop b{display:block;font-size:14px;color:var(--ink)}
.drop small{color:var(--muted);font-size:12.5px}
.header__cta{margin-left:auto;display:flex;gap:6px;align-items:center}
.burger{display:none;width:40px;height:40px;border-radius:10px;background:var(--bg-2);place-items:center}

/* ---------- Hero + mockup nghiêng ---------- */
.hero{padding:90px 0 40px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;left:50%;top:-200px;width:900px;height:600px;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(109,93,246,.14),transparent 70%);pointer-events:none}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 6px 6px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;font-weight:500;box-shadow:var(--shadow)}
.pill span{background:var(--grad);color:#fff;border-radius:999px;padding:3px 9px;font-size:11px;font-weight:700}
.hero h1{font-size:clamp(38px,5.6vw,68px);max-width:820px;margin:22px auto 18px}
.hero p{font-size:18px;color:var(--muted);max-width:600px;margin-inline:auto}
.hero__cta{display:flex;justify-content:center;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero__note{margin-top:14px;font-size:13px;color:var(--muted)}
.mock{margin:60px auto 0;max-width:1000px;perspective:1600px}
.mock__frame{transform:rotateX(14deg);transform-origin:top;border-radius:var(--radius-lg);padding:4px;background:var(--grad);box-shadow:var(--shadow-lg)}
.mock__in{background:#fff;border-radius:calc(var(--radius-lg) - 4px);overflow:hidden;border:1px solid rgba(255,255,255,.6)}
.mock__bar{display:flex;gap:6px;padding:12px 16px;border-bottom:1px solid var(--line)}
.mock__bar i{width:10px;height:10px;border-radius:50%;background:var(--line)}
.mock__bar i:first-child{background:#FF5F57}.mock__bar i:nth-child(2){background:#FEBC2E}.mock__bar i:nth-child(3){background:#28C840}
.mock .ph{aspect-ratio:16/9}
/* Dashboard giả bằng CSS (thay ảnh chụp màn hình) */
.dash{display:grid;grid-template-columns:200px 1fr;aspect-ratio:16/9;text-align:left;font-size:12px;background:#fff}
.dash__side{background:#F7F7FB;border-right:1px solid var(--line);padding:16px 14px;display:flex;flex-direction:column;gap:6px}
.dash__side b{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin:8px 0 2px}
.dash__side span{padding:7px 10px;border-radius:8px;color:var(--ink);display:flex;gap:8px;align-items:center}
.dash__side span::before{content:"";width:8px;height:8px;border-radius:3px;background:var(--line)}
.dash__side span.on{background:var(--violet-soft);color:var(--violet);font-weight:600}.dash__side span.on::before{background:var(--violet)}
.dash__main{padding:18px 20px;display:flex;flex-direction:column;gap:14px;min-width:0}
.dash__top{display:flex;justify-content:space-between;align-items:center}
.dash__top h4{font-size:15px}
.dash__top div{display:flex;gap:6px}
.dash__top i{width:24px;height:24px;border-radius:50%;background:var(--grad);border:2px solid #fff;margin-left:-8px}
.dash__kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.dash__kpi div{border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.dash__kpi small{color:var(--muted);display:block}.dash__kpi b{font-size:18px}
.dash__kpi em{font-style:normal;color:var(--green);font-size:11px;margin-left:4px}
.dash__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;flex:1;min-height:0}
.dash__col{background:#F7F7FB;border-radius:10px;padding:8px;display:flex;flex-direction:column;gap:6px;overflow:hidden}
.dash__col h5{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;display:flex;justify-content:space-between;padding:2px 4px}
.dash__card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 10px;display:grid;gap:5px}
.dash__card p{font-size:12px;line-height:1.3;font-weight:600;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dash__card div{display:flex;justify-content:space-between;align-items:center}
.dash__card .tg{font-size:10px;padding:2px 7px;border-radius:999px;background:var(--violet-soft);color:var(--violet);font-weight:600}
.dash__card .tg--g{background:#DCFCE7;color:var(--green)}.dash__card .tg--y{background:#FEF3C7;color:#B45309}.dash__card .tg--r{background:#FEE2E2;color:#B91C1C}
.dash__card .av{width:18px;height:18px;border-radius:50%;background:var(--grad)}
@media (max-width:640px){.dash{grid-template-columns:1fr;aspect-ratio:auto}.dash__side{display:none}.dash__kpi{grid-template-columns:1fr 1fr}.dash__cols{grid-template-columns:1fr}}
.float{position:absolute;background:#fff;border-radius:var(--radius);padding:12px 16px;box-shadow:var(--shadow-lg);display:flex;gap:10px;align-items:center;font-size:13px;text-align:left}
.float b{display:block;font-size:14px;color:var(--ink)}
.float small{color:var(--muted)}
.float .ic{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;flex:none}

/* ---------- Logo wall ---------- */
.logos{padding:40px 0;border-block:1px solid var(--line);text-align:center}
.logos p{font-size:12.5px;color:var(--muted);font-weight:600;letter-spacing:1px;text-transform:uppercase;margin-bottom:22px}
.logos__row{display:flex;justify-content:center;gap:44px;flex-wrap:wrap;font-weight:800;font-size:17px;color:#C3C7D6;letter-spacing:.5px}

/* ---------- Section ---------- */
.section{padding:96px 0}
.section--soft{background:var(--bg-2)}
.section--ink{background:var(--ink);color:#fff}
.section--ink h2,.section--ink h3{color:#fff}
.section__head{max-width:640px;margin:0 auto 54px;text-align:center}
.section__head .pill{margin-bottom:16px}
.section__title{font-size:clamp(30px,3.8vw,46px)}
.section__head p{color:var(--muted);margin-top:14px;font-size:17px}
.section--ink .section__head p{color:rgba(255,255,255,.7)}

/* ---------- Bento tính năng ---------- */
.bento{display:grid;grid-template-columns:repeat(6,1fr);grid-auto-rows:minmax(200px,auto);gap:18px}
.bcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;position:relative;overflow:hidden;display:flex;flex-direction:column;transition:.25s}
.bcard:hover{box-shadow:var(--shadow-lg);border-color:transparent;transform:translateY(-3px)}
.bcard .ic{width:42px;height:42px;border-radius:12px;background:var(--violet-soft);color:var(--violet);display:grid;place-items:center;margin-bottom:auto}
.bcard h3{font-size:20px;margin:22px 0 6px}
.bcard p{color:var(--muted);font-size:14px}
.bcard .mini{margin-top:18px;border-radius:12px;background:var(--bg-2);border:1px solid var(--line);padding:12px;font-size:12px;color:var(--muted)}
.mini .bar{height:8px;border-radius:4px;background:var(--line);margin:8px 0;overflow:hidden}
.mini .bar span{display:block;height:100%;background:var(--grad);border-radius:4px}
.mini .row{display:flex;justify-content:space-between;padding:6px 0;border-top:1px dashed var(--line)}
.mini .chip{display:inline-block;background:var(--violet-soft);color:var(--violet);padding:2px 8px;border-radius:999px;font-weight:600;margin:2px 2px 0 0}
.b-4{grid-column:span 4}.b-2{grid-column:span 2}.b-3{grid-column:span 3}
.bcard--grad{background:var(--grad);color:#fff;border:0}
.bcard--grad h3{color:#fff}.bcard--grad p{color:rgba(255,255,255,.85)}
.bcard--grad .ic{background:rgba(255,255,255,.2);color:#fff}

/* ---------- 3 bước đường nối ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;position:relative}
.steps::before{content:"";position:absolute;left:16%;right:16%;top:32px;height:2px;background:repeating-linear-gradient(90deg,var(--violet) 0 8px,transparent 8px 16px);opacity:.5}
.step{text-align:center;padding:0 10px}
.step span{width:64px;height:64px;border-radius:20px;background:#fff;border:2px solid var(--violet);color:var(--violet);display:grid;place-items:center;font-weight:800;font-size:20px;margin:0 auto 18px;position:relative;z-index:1;box-shadow:var(--shadow)}
.step h3{font-size:19px;margin-bottom:6px}
.step p{color:var(--muted);font-size:14px}

/* ---------- Số liệu ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat b{display:block;font-size:44px;font-weight:800;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{display:block;margin-top:8px;font-size:14px;opacity:.75}

/* ---------- Bảng giá toggle ---------- */
.toggle{display:inline-flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px;margin:0 auto 40px;font-size:14px;font-weight:600}
.toggle button{padding:8px 18px;border-radius:999px;color:var(--muted)}
.toggle button.is-active{background:var(--ink);color:#fff}
.toggle .save{background:#DCFCE7;color:var(--green);padding:3px 9px;border-radius:999px;font-size:11.5px;margin-right:6px}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;display:flex;flex-direction:column;position:relative}
.plan--hot{border:2px solid transparent;background:linear-gradient(#fff,#fff) padding-box,var(--grad) border-box;box-shadow:var(--shadow-lg)}
.plan__tag{position:absolute;top:-13px;left:24px;background:var(--grad);color:#fff;font-size:11.5px;font-weight:700;padding:5px 12px;border-radius:999px}
.plan h3{font-size:20px}
.plan .desc{color:var(--muted);font-size:13.5px;margin-top:4px}
.plan__price{margin:22px 0 4px;display:flex;align-items:baseline;gap:6px}
.plan__price b{font-size:42px;font-weight:800;color:var(--ink);line-height:1}
.plan__price span{color:var(--muted);font-size:14px}
.plan .per{color:var(--muted);font-size:12.5px;min-height:18px}
.plan ul{list-style:none;display:grid;gap:10px;margin:24px 0 28px;font-size:14px}
.plan li{display:flex;gap:9px;align-items:flex-start}
.plan li svg{width:17px;height:17px;color:var(--violet);margin-top:2px}
.plan li.off{color:var(--muted)}
.plan li.off svg{color:var(--line)}
.plan .btn{margin-top:auto;width:100%}

/* ---------- Tích hợp ---------- */
.ints{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.int{width:120px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 10px;text-align:center;font-size:12.5px;font-weight:600;color:var(--muted);transition:.2s}
.int:hover{border-color:var(--violet);color:var(--ink);transform:translateY(-3px)}
.int i{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--bg-2);margin:0 auto 10px;font-style:normal;font-weight:800;color:var(--violet)}

/* ---------- Nhận xét ---------- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.quote{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-lg);padding:26px}
.quote p{font-size:15px}
.quote__who{display:flex;align-items:center;gap:12px;margin-top:20px}
.quote__who .ph{width:42px;height:42px;border-radius:50%}
.quote__who b{display:block;font-size:14px}
.quote__who small{opacity:.65;font-size:12.5px}
.quote .co{margin-top:14px;font-size:12px;font-weight:700;letter-spacing:1px;opacity:.5;text-transform:uppercase}

/* ---------- Changelog ---------- */
.log{max-width:760px;margin-inline:auto;border-left:2px solid var(--line);padding-left:30px}
.log__item{position:relative;padding-bottom:34px}
.log__item::before{content:"";position:absolute;left:-37px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--violet);box-shadow:0 0 0 4px var(--violet-soft)}
.log__meta{display:flex;gap:10px;align-items:center;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.log__meta b{background:var(--ink);color:#fff;padding:2px 9px;border-radius:999px;font-size:11.5px}
.log__item h3{font-size:18px;margin-bottom:6px}
.log__item p{color:var(--muted);font-size:14px}
.log__item .tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;margin-right:6px}
.tag--new{background:#DCFCE7;color:var(--green)}.tag--fix{background:#FEF3C7;color:#B45309}.tag--imp{background:var(--violet-soft);color:var(--violet)}

/* ---------- FAQ ---------- */
.faq{max-width:760px;margin-inline:auto}
.faq details{border:1px solid var(--line);border-radius:var(--radius);padding:16px 22px;margin-bottom:10px;background:#fff}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;font-weight:600;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary span{color:var(--violet);font-size:20px}
.faq p{color:var(--muted);margin-top:10px;font-size:14px}

/* ---------- CTA ---------- */
.cta{border-radius:var(--radius-lg);background:var(--grad);color:#fff;padding:60px;text-align:center}
.cta h2{color:#fff;font-size:clamp(28px,3.6vw,42px)}
.cta p{opacity:.9;margin:12px auto 26px;max-width:540px}
.cta .btn{background:#fff;color:var(--violet)}

/* ---------- Trang con ---------- */
.pagehead{padding:70px 0 40px;text-align:center}
.pagehead h1{font-size:clamp(34px,4.8vw,56px);margin-top:16px}
.pagehead p{color:var(--muted);max-width:600px;margin:14px auto 0;font-size:17px}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow);max-width:640px;margin-inline:auto}
.form__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field--full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600}
.field input,.field select,.field textarea{border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font:inherit;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--violet);box-shadow:0 0 0 3px var(--violet-soft)}
.field textarea{min-height:100px;resize:vertical}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:60px 0 0;margin-top:40px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:30px}
.footer__col p{color:var(--muted);font-size:13.5px;margin-top:14px;max-width:280px}
.footer__col h4{font-size:13px;margin-bottom:14px}
.footer__col a{display:block;padding:4px 0;font-size:13.5px;color:var(--muted)}
.footer__col a:hover{color:var(--violet)}
.footer__bar{margin-top:50px;border-top:1px solid var(--line);padding:18px 0;font-size:12.5px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- Responsive ---------- */
@media (max-width:1100px){.bento{grid-template-columns:repeat(2,1fr)}.b-4,.b-2,.b-3{grid-column:auto}.plans,.quotes{grid-template-columns:1fr 1fr}.footer__grid{grid-template-columns:1fr 1fr 1fr}.stats{grid-template-columns:1fr 1fr}}
@media (max-width:980px){
  .nav{display:none}
  .nav.is-open{display:flex;position:fixed;inset:68px 0 auto 0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:12px 20px 20px;z-index:60}
  .nav.is-open .nav__link{padding:12px}
  .nav.is-open .drop{display:block;position:static;padding:0 0 8px 12px}
  .nav.is-open .drop__in{grid-template-columns:1fr;box-shadow:none;border:0;padding:0}
  .header__cta .btn--ghost{display:none}
  .burger{display:grid}
  .steps{grid-template-columns:1fr;gap:20px}.steps::before{display:none}
  .step{display:flex;gap:16px;text-align:left;align-items:center}.step span{margin:0}
  .mock__frame{transform:none}
}
@media (max-width:640px){
  .container{width:min(1160px,100% - 32px)}
  .section{padding:60px 0}
  .bento,.plans,.quotes,.form__grid,.stats{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
  .cta{padding:40px 24px}
  .form{padding:24px}
  .hero{padding-top:50px}
  .logos__row{gap:24px;font-size:14px}
}