/* SSP Học v3 (17/10/2026 10:05, Bu) — vận hành như trung tâm: duyệt học viên, mã lớp, hạn học, hạn mức AI/ngày (sql/007_enroll.sql) */
/* SSP Học v2.1 (17/10/2026 09:20, Bu) — sửa sau test: form Giao bài giữ dữ liệu khi lọc/ngẫu nhiên, trạng thái Loại, band hiện x.x, flashcard không nuốt click, bỏ lesson 0 khỏi giáo trình */
/* SSP Học v2 (17/10/2026 09:30, Bu) — Writing AI (/api/grade), đăng nhập Google, tải audio/ảnh lên Storage, nghe tối đa 2 lần; mã đẩy lên GitHub valorhuynh/ssp-hoc. */

/* SSP IELTS v1 (17/10/2026, Bu) — cùng dáng với 3 trang SSP (v-Valor): nền pastel + vệt màu mờ, thẻ trắng bo 24–28px bóng mềm, hero gradient, nút chính màu mực, dock tối nổi ở đáy trong app. Tone riêng của IELTS: xanh chàm + san hô. Font Lexend. */
:root{
  --bg:#EEF1F9; --surface:#FFFFFF; --ink:#16202A; --ink2:#4A5560; --muted:#87919B; --line:#E4E8F0; --line2:#D2D8E4; --soft:#F2F4FA; --sunk:#E7EAF4;
  --accent:#3D5BD9; --accent-ink:#FFFFFF; --accent-soft:#E2E8FB;
  --c1:#3D5BD9; --c2:#F07A5A; --c3:#17B3AC; --c4:#F2B63C; --c5:#E47AA6; --c6:#8CC36A; --c7:#8B73F0; --c8:#E0503F; --c9:#0E8F7E;
  --blobA:#C2CBFF; --blobB:#FFD2C2; --blobC:#B9EDEA;
  --heroA:#E6E9FB; --heroB:#FFE8DF; --heroC:#DDF4F2;
  --ok:#14A06A; --ok-bg:#DFF5EA; --pos-ink:#0D7A50; --warn:#E39A12; --warn-bg:#FFF0D2; --warn-ink:#8A5A00; --bad:#E0503F; --bad-bg:#FDE3DE; --neg-ink:#B3362A;
  --head:#1A2233; --head-ink:#FFFFFF;
  --shadow:0 1px 2px rgba(20,30,60,.04),0 8px 24px -14px rgba(20,30,70,.18);
  --font:"Lexend",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:24px; --r-sm:16px;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#10141D; --surface:#181D28; --ink:#EDF0F6; --ink2:#B8C0CE; --muted:#858E9C; --line:#272E3C; --line2:#364055; --soft:#1F2531; --sunk:#232A38;
  --accent:#8AA0FF; --accent-ink:#0E1424; --accent-soft:#232C4B;
  --c1:#8AA0FF; --c2:#F59A80; --c3:#3CC8C1; --c4:#F6C865; --c5:#EC8FB5; --c6:#9FD07F; --c7:#A28FF4; --c8:#EE8577; --c9:#2FB3A0;
  --blobA:#2A3470; --blobB:#5C3424; --blobC:#145250;
  --heroA:#1F2748; --heroB:#3A2A22; --heroC:#143A38;
  --ok:#4FD39A; --ok-bg:#143425; --pos-ink:#8BE6B8; --warn:#F5B52A; --warn-bg:#3A2D12; --warn-ink:#FFD27A; --bad:#F27F70; --bad-bg:#42191A; --neg-ink:#FFA59A;
  --head:#EDF0F6; --head-ink:#10141D;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 26px -16px rgba(0,0,0,.6); color-scheme:dark } }
:root[data-theme="dark"]{
  --bg:#10141D; --surface:#181D28; --ink:#EDF0F6; --ink2:#B8C0CE; --muted:#858E9C; --line:#272E3C; --line2:#364055; --soft:#1F2531; --sunk:#232A38;
  --accent:#8AA0FF; --accent-ink:#0E1424; --accent-soft:#232C4B;
  --c1:#8AA0FF; --c2:#F59A80; --c3:#3CC8C1; --c4:#F6C865; --c5:#EC8FB5; --c6:#9FD07F; --c7:#A28FF4; --c8:#EE8577; --c9:#2FB3A0;
  --blobA:#2A3470; --blobB:#5C3424; --blobC:#145250;
  --heroA:#1F2748; --heroB:#3A2A22; --heroC:#143A38;
  --ok:#4FD39A; --ok-bg:#143425; --pos-ink:#8BE6B8; --warn:#F5B52A; --warn-bg:#3A2D12; --warn-ink:#FFD27A; --bad:#F27F70; --bad-bg:#42191A; --neg-ink:#FFA59A;
  --head:#EDF0F6; --head-ink:#10141D;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 26px -16px rgba(0,0,0,.6); color-scheme:dark }

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:14px;line-height:1.5;font-variant-numeric:tabular-nums;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0}
body::before{content:"";position:fixed;inset:-24vh -10vw auto -10vw;height:56vh;z-index:-1;pointer-events:none;background:radial-gradient(30vw 26vh at 6% 20%,var(--blobA),transparent 70%),radial-gradient(30vw 22vh at 30% 4%,var(--blobB),transparent 70%),radial-gradient(28vw 22vh at 62% 0%,var(--blobC),transparent 72%);opacity:.55;filter:blur(18px)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;text-wrap:balance;font-weight:700}
p{margin:0}
a{color:inherit}
.muted{color:var(--muted)}
.wrap{max-width:1120px;margin:0 auto}

/* ===== nút, nhãn ===== */
.btn{border:1px solid var(--line2);background:var(--surface);color:var(--ink);border-radius:14px;padding:10px 18px;font-weight:600;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;transition:background .15s,transform .15s;text-decoration:none}
.btn:hover{background:var(--soft)}
.btn:active{transform:translateY(1px)}
.btn.pri{background:var(--head);color:var(--head-ink);border-color:var(--head)}
.btn.pri:hover{opacity:.88;background:var(--head)}
.btn.acc{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.sm{padding:6px 12px;font-size:12.5px;border-radius:10px}
.btn.ghost{background:transparent;border-color:transparent}
.btn[disabled]{opacity:.5;cursor:default;transform:none}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:600;border-radius:999px;padding:3px 10px;background:var(--soft);color:var(--ink2);white-space:nowrap}
.tag::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor;opacity:.8}
.tag.ok{background:var(--ok-bg);color:var(--pos-ink)} .tag.ok::before{background:var(--ok);opacity:1}
.tag.warn{background:var(--warn-bg);color:var(--warn-ink)} .tag.warn::before{background:var(--warn);opacity:1}
.tag.bad{background:var(--bad-bg);color:var(--neg-ink)} .tag.bad::before{background:var(--bad);opacity:1}
.tag.acc{background:var(--accent-soft);color:var(--accent)} .tag.acc::before{background:var(--accent);opacity:1}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{font-size:12px;font-weight:600;border-radius:999px;padding:4px 11px;background:var(--soft);color:var(--ink2);border:0}
.chip[aria-pressed="true"]{background:var(--head);color:var(--head-ink)}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:22px;min-width:0}
.panel h2,.panel h3{font-size:17px;margin-bottom:12px}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:18px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(92px + env(safe-area-inset-bottom,0px));background:var(--head);color:var(--head-ink);border-radius:999px;padding:10px 18px;font-weight:600;z-index:60;box-shadow:var(--shadow);max-width:calc(100% - 32px);text-align:center}
.mark{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;flex:none;color:#fff;font-weight:800;font-size:13px;letter-spacing:-.04em;background:radial-gradient(120% 120% at 30% 20%,#8EA2FF 0%,#3D5BD9 55%,#2A3F9E 100%);box-shadow:0 2px 0 rgba(255,255,255,.35) inset,0 -3px 0 rgba(0,0,0,.18) inset,0 6px 14px -6px rgba(61,91,217,.6)}

/* ===== LANDING ===== */
#landing{padding-bottom:40px}
.lnav{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;display:flex;align-items:center;gap:14px;padding-block:14px 10px;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.lnav .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.02em;text-decoration:none}
.lnav .links{display:flex;gap:2px;margin-left:8px}
.lnav .links a{text-decoration:none;color:var(--ink2);font-weight:500;font-size:13.5px;padding:6px 12px;border-radius:12px}
.lnav .links a:hover{background:var(--soft);color:var(--ink)}
.lnav .auth{margin-left:auto;display:flex;gap:6px}
@media (max-width:640px){.lnav .links{display:none}}
.lhero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;align-items:center;padding-block:34px 20px}
.lhero .eb{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--ink2);background:color-mix(in srgb,var(--surface) 80%,transparent);border-radius:999px;padding:5px 12px;border:1px solid var(--line)}
.lhero h1{font-size:clamp(34px,5.2vw,62px);font-weight:800;letter-spacing:-.045em;line-height:1.02;margin:16px 0 14px}
.lhero h1 em{font-style:normal;color:var(--accent)}
.lhero .sub{font-size:15.5px;color:var(--ink2);max-width:46ch}
.lhero .acts{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.lhero .note{font-size:12.5px;color:var(--muted);margin-top:10px}
@media (max-width:860px){.lhero{grid-template-columns:1fr;padding-top:22px}}
/* demo app trong hero */
.demo{position:relative}
.demo .try{position:absolute;top:-10px;left:14px;z-index:2;font-size:12px;font-weight:700;background:var(--c4);color:#3A2A00;border-radius:999px;padding:4px 12px;box-shadow:var(--shadow);transform:rotate(-3deg)}
.phone{background:var(--surface);border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow),0 30px 60px -30px rgba(40,50,100,.35);padding:16px;display:grid;gap:12px;min-width:0}
.phone .ph{display:flex;align-items:center;gap:10px}
.phone .av{width:32px;height:32px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:700;font-size:12px}
.phone .ph small{display:block;color:var(--muted);font-size:11.5px}
.phone .tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;margin-inline:-4px;padding-inline:4px}
.phone .tabs::-webkit-scrollbar{display:none}
.phone .tabs button{flex:none;border:0;border-radius:999px;padding:6px 12px;font-size:12.5px;font-weight:600;background:var(--soft);color:var(--ink2)}
.phone .tabs button[aria-selected="true"]{background:var(--head);color:var(--head-ink)}
.phone .body{background:var(--soft);border-radius:20px;padding:16px;min-height:230px;display:grid;gap:10px;align-content:start}
.phone .body .t{font-size:12px;color:var(--muted)}
.phone .body .t b{color:var(--ink)}
.fill{font-size:15px;line-height:1.7}
.fill .gap{display:inline-block;min-width:118px;border-bottom:2px dashed var(--line2);text-align:center;color:var(--accent);font-weight:600;vertical-align:bottom}
.fill .gap.ok{border-color:var(--ok);color:var(--pos-ink)} .fill .gap.bad{border-color:var(--bad);color:var(--neg-ink)}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.opts button{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:9px 10px;font-weight:500;text-align:left;font-size:13px;transition:transform .15s}
.opts button:hover{transform:translateY(-1px)}
.opts button.ok{background:var(--ok-bg);color:var(--pos-ink);border-color:transparent}
.opts button.bad{background:var(--bad-bg);color:var(--neg-ink);border-color:transparent}
@media (max-width:420px){.opts{grid-template-columns:1fr}}
.bandbox{display:flex;align-items:center;gap:14px}
.bandbox .big{font-size:40px;font-weight:800;letter-spacing:-.05em;line-height:1}
.crit{display:grid;gap:6px}
.crit .r{display:grid;grid-template-columns:minmax(0,1fr) 60px 34px;gap:8px;align-items:center;font-size:12.5px}
.crit .r .b{height:8px;border-radius:99px;background:var(--sunk);overflow:hidden}
.crit .r .b i{display:block;height:100%;background:linear-gradient(90deg,var(--c1),var(--c3));border-radius:99px}
.crit .r b{text-align:right}
.timerbox{display:flex;justify-content:space-between;align-items:center}
.timerbox b{font-size:26px;letter-spacing:-.03em}
.cue{background:var(--surface);border-radius:14px;padding:12px 14px;font-size:13px;line-height:1.55}
.cue ul{margin:6px 0 0;padding-left:18px}

.lsec{padding-block:36px}
.lsec h2{font-size:clamp(24px,3.4vw,36px);font-weight:800;letter-spacing:-.035em;margin-bottom:8px}
.lsec>p{color:var(--ink2);max-width:60ch;font-size:15px}
.lessons{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:20px}
.lesson{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:12px 14px;box-shadow:var(--shadow);min-width:0}
.lesson b{display:block;font-size:11.5px;color:var(--accent);font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.lesson span{display:block;font-size:13px;font-weight:500;margin-top:3px;line-height:1.3}
.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:18px;margin-top:22px}
.skill{background:var(--surface);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:22px;display:grid;gap:12px;align-content:start;min-width:0}
.skill .ic{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--k);color:#fff}
.skill .ic svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.skill h3{font-size:19px}
.skill p{color:var(--ink2);font-size:13.5px}
.skill .mini{background:var(--soft);border-radius:18px;padding:14px;display:grid;gap:8px;font-size:12.5px}
.games{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.games div{background:var(--surface);border-radius:12px;padding:8px 10px}
.games div b{display:block;font-size:12.5px}
.games div span{color:var(--muted);font-size:11.5px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:14px;margin-top:22px}
.step{display:flex;gap:14px;align-items:flex-start}
.step b{flex:none;width:40px;height:40px;border-radius:14px;background:var(--head);color:var(--head-ink);display:grid;place-items:center;font-size:17px}
.step h3{font-size:16px;margin-bottom:4px}
.step p{color:var(--ink2);font-size:13.5px}
.cta{background:linear-gradient(125deg,var(--heroA) 0%,var(--heroA) 30%,var(--heroB) 68%,var(--heroC) 100%);border-radius:30px;padding:34px;text-align:center;display:grid;gap:10px;justify-items:center;box-shadow:var(--shadow)}
.cta h2{font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:-.04em}
.lfoot{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center;padding-block:28px 8px;color:var(--muted);font-size:12.5px}

/* ===== APP ===== */
#app{padding-bottom:calc(96px + env(safe-area-inset-bottom,0px))}
.atop{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;display:flex;align-items:center;gap:12px;padding-block:14px 10px;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.atop .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:-.02em}
.atop .brand small{display:block;font-size:11px;color:var(--muted);font-weight:400}
.atop .stats{margin-left:auto;display:flex;gap:6px}
.atop .stat{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 11px;font-size:12.5px;font-weight:600}
.atop .stat i{width:9px;height:9px;border-radius:50%;background:var(--c4);flex:none}
.atop .stat.fire i{background:var(--c2)}
.atop .ctl{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;flex:none;padding:0}
.atop .ctl svg{width:18px;height:18px;stroke:var(--ink2);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
@media (max-width:520px){.atop .brand small{display:none}.atop .stat span{display:none}}

.dock{position:fixed;bottom:calc(14px + env(safe-area-inset-bottom,0px));left:50%;transform:translateX(-50%);z-index:30;display:flex;gap:2px;background:var(--head);border-radius:22px;padding:6px;box-shadow:0 14px 36px -12px rgba(10,20,50,.5);width:min(760px,calc(100% - 32px - env(safe-area-inset-left,0px) - env(safe-area-inset-right,0px)))}
.dock button{flex:1;min-width:0;border:0;background:transparent;color:color-mix(in srgb,var(--head-ink) 70%,transparent);border-radius:16px;padding:9px 6px;display:flex;align-items:center;justify-content:center;gap:7px;font-size:12.5px;font-weight:600;transition:background .15s,color .15s}
.dock button svg{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.dock button[aria-selected="true"]{background:color-mix(in srgb,var(--head-ink) 16%,transparent);color:var(--head-ink)}
@media (max-width:640px){.dock button:not([aria-selected="true"]) .lbl{display:none}.dock button[aria-selected="true"]{flex:2.2}}

main.view{display:grid;gap:18px;padding-top:12px;max-width:1120px;margin:0 auto}
.ph{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap}
.ph h1{font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.04em}
.ph p{color:var(--muted);font-size:13.5px;max-width:60ch;margin-top:4px}

.hero{position:relative;border-radius:30px;padding:28px 28px 20px;margin-top:6px;background:linear-gradient(125deg,var(--heroA) 0%,var(--heroA) 30%,var(--heroB) 68%,var(--heroC) 100%);box-shadow:var(--shadow);display:grid;gap:18px;border:1px solid color-mix(in srgb,var(--surface) 50%,transparent)}
.hero .eb,.authbox .eb{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--ink2);background:color-mix(in srgb,var(--surface) 72%,transparent);border-radius:999px;padding:4px 12px}
.hero h1{margin:12px 0 6px;font-size:clamp(28px,4vw,46px);font-weight:800;letter-spacing:-.045em;line-height:1.02}
.hero .sub{color:var(--ink2);font-size:13.5px;max-width:52ch}
.hero .acts{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.hero .stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;background:var(--surface);border-radius:22px;padding:18px 20px}
.hero .st{min-width:0;padding:0 8px}
.hero .st .l{font-size:12.5px;color:var(--ink);font-weight:500}
.hero .st .v{font-size:clamp(26px,3.4vw,40px);font-weight:800;letter-spacing:-.05em;line-height:1.08;margin-top:4px}
.hero .st .v small{font-size:13px;font-weight:500;color:var(--muted);letter-spacing:0;margin-left:3px}
.hero .st .s{font-size:11.5px;color:var(--muted);margin-top:2px}
@media (max-width:560px){.hero{padding:22px 18px 16px}.hero .stats{grid-template-columns:1fr;gap:12px}.hero .st+.st{border-top:1px solid var(--line);padding-top:12px}}

.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,160px),1fr));gap:14px}
.kpi{--k:var(--c1);background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:16px 18px;box-shadow:var(--shadow);min-width:0;text-align:left;cursor:pointer;transition:transform .15s}
.kpi:hover{transform:translateY(-2px)}
.kpi .l{font-size:12.5px;color:var(--ink);font-weight:500;display:flex;align-items:center;gap:8px}
.kpi .l::before{content:"";width:11px;height:11px;border-radius:3px;background:var(--k);flex:none}
.kpi .v{font-size:clamp(20px,calc(1.6vw + 10px),28px);font-weight:700;letter-spacing:-.04em;margin-top:6px;line-height:1.1}
.kpi .s{font-size:11.5px;color:var(--muted);margin-top:3px}
.kpi .bar{height:14px;border-radius:6px;background:var(--soft);margin-top:10px;overflow:hidden}
.kpi .bar i{display:block;height:100%;border-radius:6px;background:color-mix(in srgb,var(--k) 55%,var(--surface))}

.list{display:grid;gap:8px}
.row{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:16px;background:var(--soft);min-width:0;border:0;text-align:left;width:100%;transition:transform .12s}
button.row:hover{transform:translateY(-1px)}
.row .n{flex:1;min-width:0}
.row .n b{display:block;font-size:14px}
.row .n small{display:block;color:var(--muted);font-size:12px;margin-top:1px}
.row .num{flex:none;width:36px;height:36px;border-radius:12px;background:var(--surface);display:grid;place-items:center;font-weight:700;color:var(--accent)}
.row.lock{opacity:.65}
.row.lock .num{color:var(--muted)}

/* bài viết */
.prompt{background:var(--soft);border-radius:18px;padding:16px;font-size:14px;line-height:1.6}
.prompt b{display:block;font-size:11.5px;color:var(--accent);letter-spacing:.05em;text-transform:uppercase;margin-bottom:6px}
textarea{width:100%;min-height:220px;border:1px solid var(--line2);border-radius:18px;background:var(--surface);padding:14px;resize:vertical;line-height:1.6;font-size:14px}
textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.wc{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;font-size:12.5px;color:var(--muted)}
.result{display:grid;gap:14px}
.result .top{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.result .big{font-size:56px;font-weight:800;letter-spacing:-.06em;line-height:1}
.fb{display:grid;gap:8px}
.fb div{background:var(--soft);border-radius:14px;padding:10px 12px;font-size:13px;line-height:1.5;border-left:3px solid var(--c4)}
.fb div.good{border-left-color:var(--ok)}

/* reading */
.passage{background:var(--soft);border-radius:18px;padding:18px;font-size:14.5px;line-height:1.75;max-height:60vh;overflow:auto}
.passage h3{font-size:16px;margin-bottom:8px}
.passage p+p{margin-top:10px}
.qs{display:grid;gap:12px}
.q{background:var(--soft);border-radius:16px;padding:12px 14px}
.q .qt{font-weight:500;margin-bottom:8px;font-size:13.5px}
.q .qt b{color:var(--accent);margin-right:6px}
.q .o{display:grid;gap:6px}
.q .o label{display:flex;gap:8px;align-items:flex-start;background:var(--surface);border-radius:10px;padding:7px 10px;font-size:13px;cursor:pointer}
.q .o label input{margin-top:2px;accent-color:var(--accent)}
.q.ok{box-shadow:inset 0 0 0 2px var(--ok)} .q.bad{box-shadow:inset 0 0 0 2px var(--bad)}
.timer{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-weight:700;font-size:16px;letter-spacing:-.02em}
.timer.low{color:var(--neg-ink);border-color:var(--bad)}
.rl{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:860px){.rl{grid-template-columns:1fr}}

/* speaking */
.cuecard{background:var(--surface);border:2px solid var(--line2);border-radius:22px;padding:22px;font-size:15px;line-height:1.6}
.cuecard b{display:block;font-size:11.5px;color:var(--accent);letter-spacing:.05em;text-transform:uppercase;margin-bottom:8px}
.cuecard ul{margin:8px 0 0;padding-left:20px}
.bigtimer{display:grid;justify-items:center;gap:6px;padding:18px;background:var(--soft);border-radius:22px}
.bigtimer b{font-size:52px;font-weight:800;letter-spacing:-.06em;line-height:1}
.bigtimer span{font-size:12.5px;color:var(--muted)}
.sample{background:var(--soft);border-radius:18px;padding:16px;font-size:14px;line-height:1.7}
.sample mark{background:var(--accent-soft);color:var(--accent);border-radius:4px;padding:0 3px}

/* từ vựng */
.card3d{perspective:1200px;min-height:230px}
.card3d .inner{position:relative;width:100%;min-height:230px;transition:transform .5s;transform-style:preserve-3d;cursor:pointer}
.card3d.flip .inner{transform:rotateY(180deg)}
.card3d .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:24px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);display:grid;place-content:center;text-align:center;padding:24px;gap:6px}
.card3d .face.back{transform:rotateY(180deg);background:linear-gradient(135deg,var(--heroA),var(--heroC))}
.card3d .w{font-size:30px;font-weight:800;letter-spacing:-.04em}
.card3d .m{font-size:17px;font-weight:600}
.card3d .co{font-size:13px;color:var(--ink2)}
.card3d .ex{font-size:13px;color:var(--muted);font-style:italic;max-width:40ch}
@media (prefers-reduced-motion:reduce){.card3d .inner{transition:none}}
.vocab{display:grid;gap:8px}
.vrow{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px;background:var(--soft);border-radius:14px;padding:10px 12px;font-size:13px}
.vrow b{display:block}
.vrow small{color:var(--muted);display:block}
@media (max-width:520px){.vrow{grid-template-columns:1fr}}
.gamegrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:12px}
.game{--k:var(--c1);background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:16px;box-shadow:var(--shadow);text-align:left;display:grid;gap:6px;transition:transform .15s}
.game:hover{transform:translateY(-2px)}
.game .ic{width:40px;height:40px;border-radius:13px;background:var(--k);display:grid;place-items:center;color:#fff}
.game .ic svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.game b{font-size:15px}
.game span{color:var(--muted);font-size:12.5px}
.game .rw{font-size:12px;color:var(--warn-ink);font-weight:600}
.arena{display:grid;gap:14px}
.arena .hud{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.arena .hud b{font-size:20px;letter-spacing:-.03em}
.arena .prog{height:10px;border-radius:99px;background:var(--sunk);overflow:hidden}
.arena .prog i{display:block;height:100%;background:linear-gradient(90deg,var(--c2),var(--c4));border-radius:99px;transition:width .2s linear}
.arena .qbig{font-size:22px;font-weight:700;text-align:center;padding:18px;background:var(--soft);border-radius:18px;letter-spacing:-.02em}
.bricks{display:flex;gap:6px;flex-wrap:wrap;min-height:44px;padding:8px;border-radius:14px;border:1.5px dashed var(--line2)}
.bricks button,.pool button{border:0;background:var(--surface);border-radius:10px;padding:6px 10px;font-weight:600;font-size:13.5px;box-shadow:var(--shadow)}
.pool{display:flex;gap:6px;flex-wrap:wrap}
.pool button{background:var(--accent-soft);color:var(--accent)}
.tower{display:flex;flex-direction:column-reverse;align-items:center;gap:3px;min-height:90px;justify-content:flex-start}
.tower i{display:block;height:14px;border-radius:5px;background:linear-gradient(90deg,var(--c1),var(--c3))}
.shop{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}
.item{background:var(--soft);border-radius:16px;padding:12px;text-align:center;display:grid;gap:6px;justify-items:center}
.item .sw{width:44px;height:44px;border-radius:50%;box-shadow:0 0 0 3px var(--surface),0 0 0 5px var(--k)}
.item b{font-size:12.5px}
.item .pr{font-size:12px;color:var(--warn-ink);font-weight:600}
.board{display:grid;gap:6px}
.board .r{display:grid;grid-template-columns:30px 32px minmax(0,1fr) auto;gap:10px;align-items:center;padding:8px 10px;border-radius:12px;background:var(--soft);font-size:13.5px}
.board .r.me{background:var(--accent-soft);font-weight:600}
.board .r .rk{font-weight:700;color:var(--muted)}
.board .av{width:32px;height:32px;border-radius:50%;background:var(--surface);display:grid;place-items:center;font-size:11px;font-weight:700;box-shadow:0 0 0 2px var(--k)}
.board .r.top1 .rk{color:var(--c4)}

/* hồ sơ */
.chart{width:100%;height:auto;display:block}
.chart text{font-family:var(--font);font-size:11px;fill:var(--muted)}
.badges{display:flex;gap:8px;flex-wrap:wrap}
.badge{display:inline-flex;align-items:center;gap:8px;background:var(--soft);border-radius:14px;padding:8px 12px;font-size:12.5px;font-weight:600}
.badge i{width:22px;height:22px;border-radius:7px;background:var(--k);flex:none}
.badge.off{opacity:.45}
.form{display:grid;gap:10px}
.form label{display:grid;gap:4px;font-size:12.5px;color:var(--ink2);font-weight:500}
.form input{border:1px solid var(--line2);border-radius:12px;padding:10px 12px;background:var(--surface);width:100%}
.form input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
@media (max-width:520px){.form input,textarea{font-size:16px}}

/* đăng nhập */
.authbox{max-width:440px;margin:30px auto;display:grid;gap:14px}
.authbox .panel{padding:26px}
.authbox h2{font-size:24px;font-weight:800;letter-spacing:-.04em}
.divider{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}
.notice{background:var(--warn-bg);color:var(--warn-ink);border-radius:14px;padding:10px 14px;font-size:12.5px;font-weight:500}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ===== bổ sung cho web nhiều trang (17/10/2026) ===== */
.topnav{display:flex;align-items:center;gap:12px;padding-block:14px 10px;position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.topnav .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:-.02em;text-decoration:none;color:inherit}
.topnav .brand small{display:block;font-size:11px;color:var(--muted);font-weight:400}
.topnav .sp{flex:1}
.mark.coral{background:radial-gradient(120% 120% at 30% 20%,#FFB89F 0%,#F07A5A 55%,#B8452A 100%);box-shadow:0 2px 0 rgba(255,255,255,.35) inset,0 -3px 0 rgba(0,0,0,.18) inset,0 6px 14px -6px rgba(240,122,90,.6)}
.mark.teal{background:radial-gradient(120% 120% at 30% 20%,#7FE3DD 0%,#17B3AC 55%,#0B6F6A 100%);box-shadow:0 2px 0 rgba(255,255,255,.35) inset,0 -3px 0 rgba(0,0,0,.18) inset,0 6px 14px -6px rgba(23,179,172,.6)}
.tabsbar{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding-block:4px 10px}
.tabsbar::-webkit-scrollbar{display:none}
.tabsbar button{flex:none;border:0;border-radius:999px;padding:8px 14px;font-weight:600;font-size:13px;background:var(--surface);color:var(--ink2);border:1px solid var(--line)}
.tabsbar button[aria-selected="true"]{background:var(--head);color:var(--head-ink);border-color:var(--head)}
.tablebox{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow-x:auto;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;font-size:13px}
th{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
tbody tr:last-child td{border-bottom:0}
tbody tr.click,td.click{cursor:pointer} tbody tr.click:hover td,td.click:hover{background:var(--soft)}
.row.click{cursor:pointer} .row.click:hover{background:var(--soft)}
td.num,th.num{text-align:right;white-space:nowrap}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.toolbar select,.toolbar input{border:1px solid var(--line2);border-radius:12px;padding:8px 12px;background:var(--surface);color:inherit;min-width:0}
.search{flex:1;min-width:160px;max-width:320px}
.fgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px 12px}
.fld{display:grid;gap:4px;min-width:0}
.fld>span{font-size:12px;color:var(--muted);font-weight:600}
.fld input,.fld select,.fld textarea{width:100%;border:1px solid var(--line2);border-radius:12px;padding:9px 12px;background:var(--surface);color:inherit}
.fld textarea{min-height:90px;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.fld.s2{grid-column:span 2} .fld.s3{grid-column:1/-1}
@media (max-width:520px){.fld.s2{grid-column:1/-1}.fld input,.fld select,.fld textarea{font-size:16px}}
dialog{border:1px solid var(--line);border-radius:28px;background:var(--surface);color:var(--ink);padding:0;width:min(720px,calc(100vw - 24px));max-height:calc(100vh - 24px);box-shadow:0 20px 50px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(10,12,18,.5)}
dialog .dbody{padding:22px;display:grid;gap:14px}
dialog h3{font-size:20px;font-weight:800;letter-spacing:-.03em}
.dacts{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.dacts .left{margin-right:auto}
.codebig{font-size:clamp(34px,8vw,56px);font-weight:800;letter-spacing:.12em;font-family:var(--font);background:var(--soft);border-radius:22px;padding:14px 20px;text-align:center}
.pick{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.pick button{border:1px solid var(--line);background:var(--surface);border-radius:18px;padding:16px 12px;font-weight:700;font-size:16px;box-shadow:var(--shadow);transition:transform .15s}
.pick button:hover{transform:translateY(-2px)}
.qcard{background:var(--surface);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:24px;display:grid;gap:16px}
.qcard .qtext{font-size:clamp(17px,2.4vw,22px);font-weight:600;line-height:1.5;white-space:pre-line}
.qcard .meta{display:flex;gap:6px;flex-wrap:wrap}
.bigopts{display:grid;gap:10px}
.bigopts button{border:1px solid var(--line);background:var(--soft);border-radius:18px;padding:14px 16px;text-align:left;font-size:16px;font-weight:500;display:flex;gap:12px;align-items:flex-start;transition:transform .12s}
.bigopts button b{flex:none;width:30px;height:30px;border-radius:10px;background:var(--surface);display:grid;place-items:center;font-weight:800;color:var(--accent)}
.bigopts button:hover{transform:translateY(-1px)}
.bigopts button[aria-pressed="true"]{background:var(--head);color:var(--head-ink);border-color:var(--head)}
.bigopts button[aria-pressed="true"] b{background:rgba(255,255,255,.18);color:inherit}
.bigopts button.ok{background:var(--ok-bg);color:var(--pos-ink);border-color:transparent}
.bigopts button.bad{background:var(--bad-bg);color:var(--neg-ink);border-color:transparent}
.bigin{width:100%;border:2px solid var(--line2);border-radius:18px;padding:14px 16px;font-size:18px;font-weight:600;background:var(--surface);color:inherit}
.bigin:focus{border-color:var(--accent);outline:none}
.progress{height:12px;border-radius:99px;background:var(--sunk);overflow:hidden}
.progress i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--c2),var(--c4));transition:width .25s}
.score{display:grid;justify-items:center;gap:6px;padding:26px;background:linear-gradient(135deg,var(--heroA),var(--heroB));border-radius:28px;text-align:center}
.score b{font-size:clamp(44px,10vw,72px);font-weight:800;letter-spacing:-.06em;line-height:1}
.topics{display:grid;gap:8px}
.topics .r{display:grid;grid-template-columns:minmax(0,1fr) 90px 48px;gap:10px;align-items:center;font-size:13px}
.topics .r .b{height:10px;border-radius:99px;background:var(--sunk);overflow:hidden}
.topics .r .b i{display:block;height:100%;border-radius:99px;background:var(--ok)}
.topics .r.low .b i{background:var(--bad)}
.topics .r b{text-align:right}
.review{display:grid;gap:10px}
.review .it{background:var(--soft);border-radius:18px;padding:14px;display:grid;gap:6px;border-left:4px solid var(--ok)}
.review .it.bad{border-left-color:var(--bad)}
.review .it .q{font-weight:600;white-space:pre-line}
.review .it .ex{font-size:13px;color:var(--ink2)}
.checks{display:flex;gap:8px;flex-wrap:wrap}
.checks label{display:inline-flex;gap:6px;align-items:center;background:var(--soft);border-radius:999px;padding:5px 11px;font-size:13px;cursor:pointer}
.checks input{accent-color:var(--accent)}
.empty{padding:28px;text-align:center;color:var(--muted)}
.err{background:var(--bad-bg);color:var(--neg-ink);border-radius:14px;padding:10px 14px;font-weight:500}
.ok-note{background:var(--ok-bg);color:var(--pos-ink);border-radius:14px;padding:10px 14px;font-weight:500}
.spin{display:inline-block;width:16px;height:16px;border:2px solid var(--line2);border-top-color:var(--accent);border-radius:50%;animation:sp .8s linear infinite;vertical-align:-3px}
@keyframes sp{to{transform:rotate(360deg)}}
.hub{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:18px}
a.tile{display:grid;gap:10px;align-content:start;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:var(--shadow);transition:transform .15s;min-width:0}
a.tile:hover{transform:translateY(-3px)}
a.tile .ic{width:48px;height:48px;border-radius:15px;background:var(--k);display:grid;place-items:center;color:#fff;font-weight:800;font-size:14px}
a.tile h2{margin:4px 0 0;font-size:24px;font-weight:800;letter-spacing:-.03em}
a.tile p{margin:0;color:var(--ink2);font-size:14px}