/* ===== Biến màu & dark mode ===== */
:root{--bg:#f5f6fb;--card:#fff;--tx:#1e1b4b;--mu:#6b7280;--bd:#e5e7eb;--p1:#6366f1;--p2:#8b5cf6;--ok:#16a34a;--okb:#dcfce7;--bad:#dc2626;--badb:#fee2e2;--warn:#a16207;--warnb:#fef9c3;--sh:0 4px 18px rgba(79,70,229,.08);--grad:linear-gradient(135deg,var(--p1),var(--p2))}
@media(prefers-color-scheme:dark){:root{--bg:#0f0f1a;--card:#1a1a2e;--tx:#ede9fe;--mu:#9ca3af;--bd:#2d2d47;--okb:#14532d;--badb:#7f1d1d;--warnb:#713f12;--warn:#fde68a;--sh:0 4px 18px rgba(0,0,0,.4)}}
*{box-sizing:border-box}
body{margin:0;font-family:"Be Vietnam Pro",system-ui,sans-serif;background:var(--bg);color:var(--tx);line-height:1.5}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--p2);outline-offset:2px}
h2,h3{margin:0 0 .6rem}
/* ===== Nút & form ===== */
.btn{min-height:40px;padding:0 16px;border:1px solid var(--bd);border-radius:12px;background:var(--card);cursor:pointer;font-weight:600;transition:.2s}
.btn:hover{transform:translateY(-1px)}
.btn.pri{background:var(--grad);color:#fff;border:0}
.btn.dan{color:var(--bad)}
.btn.sm{min-height:34px;padding:0 10px;font-size:.85rem}
input,select{min-height:40px;padding:0 12px;border:1px solid var(--bd);border-radius:10px;background:var(--card);max-width:100%}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:.5rem 0}
/* ===== Đăng nhập ===== */
.login{min-height:100vh;display:grid;place-items:center;position:relative;overflow:hidden;background:var(--bg);padding:16px}
.blob{position:absolute;width:340px;height:340px;border-radius:50%;filter:blur(70px);opacity:.5;animation:drift 14s ease-in-out infinite alternate}
.b1{background:#6366f1;top:-60px;left:-60px}.b2{background:#c084fc;bottom:-80px;right:-40px;animation-delay:-6s}
@keyframes drift{to{transform:translate(80px,60px) scale(1.2)}}
.glass{position:relative;width:min(380px,100%);padding:28px;border-radius:20px;background:color-mix(in srgb,var(--card) 70%,transparent);backdrop-filter:blur(16px);border:1px solid var(--bd);box-shadow:var(--sh)}
.glass input{width:100%;margin:6px 0}
.glass .btn{width:100%;margin-top:8px}
.shake{animation:shake .4s}
@keyframes shake{25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}
.logo{font-size:1.4rem;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
/* ===== Header ===== */
header{position:sticky;top:0;z-index:10;display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:10px 16px;background:color-mix(in srgb,var(--card) 75%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--bd)}
nav{display:flex;gap:6px;flex:1 1 320px;overflow-x:auto;scrollbar-width:none}
.tab{white-space:nowrap;min-height:40px;padding:0 14px;border:0;border-radius:99px;background:transparent;cursor:pointer;font-weight:600;color:var(--mu)}
.tab.on{background:var(--grad);color:#fff}
.av{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;color:#fff;font-weight:700;font-size:.85rem;flex:none}
.dot{font-size:.8rem;color:var(--mu)}
main{max-width:980px;margin:0 auto;padding:16px;animation:fade .3s}
@keyframes fade{from{opacity:0}}
/* ===== Card, nhiệm vụ, tiến độ ===== */
.card{background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:16px;box-shadow:var(--sh);margin-bottom:12px;transition:.2s}
.task{display:flex;gap:12px;align-items:center;flex-wrap:wrap;animation:up .3s}
.task:hover{transform:translateY(-2px)}
.task.done{background:var(--okb)}
.task .nm{flex:1;min-width:160px}
.task.done .nm b{text-decoration:line-through;opacity:.7}
@keyframes up{from{opacity:0;transform:translateY(10px)}}
.chip{display:inline-block;padding:2px 10px;border-radius:99px;font-size:.78rem;font-weight:600;background:var(--bd)}
.chip.ok{background:var(--okb);color:var(--ok)}.chip.bad{background:var(--badb);color:var(--bad)}.chip.warn{background:var(--warnb);color:var(--warn)}
.mu{color:var(--mu);font-size:.85rem}
.bar{height:14px;border-radius:99px;background:var(--bd);overflow:hidden}
.bar i{display:block;height:100%;background:var(--grad);transition:width .8s ease;border-radius:99px}
.tick{animation:pop .4s}
@keyframes pop{50%{transform:scale(1.3)}}
.empty{text-align:center;padding:36px 12px;color:var(--mu)}.empty b{display:block;font-size:2.6rem}
.confetti{position:fixed;top:-20px;font-size:1.4rem;animation:fall 2.2s linear forwards;z-index:50;pointer-events:none}
@keyframes fall{to{transform:translateY(105vh) rotate(540deg)}}
/* ===== Đánh giá ===== */
.pills{display:flex;gap:4px;flex-wrap:wrap;margin:4px 0 10px}
.pill{min-height:36px;padding:0 10px;border:1px solid var(--bd);border-radius:99px;background:var(--card);cursor:pointer;font-size:.82rem}
.pill.on{background:var(--grad);color:#fff;border-color:transparent}
.badge{float:right;padding:4px 12px;border-radius:99px;font-weight:700}
.badge.g{background:var(--okb);color:var(--ok)}.badge.y{background:var(--warnb);color:var(--warn)}.badge.r{background:var(--badb);color:var(--bad)}
.warnbox{background:var(--warnb);color:var(--warn);padding:8px 12px;border-radius:10px;margin:6px 0;font-size:.88rem}
table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{padding:8px;border-bottom:1px solid var(--bd);text-align:left}
.tw{overflow-x:auto}tr.best{background:var(--okb)}
td input[type=number]{width:80px}
/* ===== Toast ===== */
#toasts{position:fixed;right:16px;bottom:16px;display:grid;gap:8px;z-index:60}
.toast{padding:10px 16px;border-radius:12px;background:var(--tx);color:var(--bg);box-shadow:var(--sh);animation:up .3s}
.toast.err{background:var(--bad);color:#fff}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ===== Nâng cấp: form, ngày tháng, hộp thoại, điện thoại ===== */
:root{color-scheme:light dark}
html{-webkit-text-size-adjust:100%}
input,select{font-size:16px;min-width:0;-webkit-appearance:none;appearance:none}
select{padding-right:34px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
input[type=checkbox]{-webkit-appearance:auto;appearance:auto;width:22px;height:22px;min-height:0;padding:0;flex:none}
input[type=date]{width:100%;display:block;min-height:44px;text-align:left;cursor:pointer}
input[type=date]::-webkit-date-and-time-value{text-align:left}
input[type=date]::-webkit-calendar-picker-indicator{cursor:pointer;opacity:.75}
.row input:not([type=checkbox]){flex:1 1 150px}
label.chip{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:4px 12px;cursor:pointer}
.fg{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.fl{display:flex;flex-direction:column;gap:4px;font-weight:600;font-size:.88rem}
.fl input,.fl select{width:100%;min-height:44px}
.w2{grid-column:1/-1}
.qd{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.chs,.acts{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.ov{position:fixed;inset:0;z-index:70;display:grid;place-items:center;padding:16px;background:rgba(15,15,26,.55);backdrop-filter:blur(4px);animation:fade .2s}
.mdl{width:min(400px,100%);margin:0;display:grid;gap:10px}
@supports not (background:color-mix(in srgb,red,blue)){.glass,header{background:var(--card)}}
@supports (height:100dvh){.login{min-height:100dvh}}
@media(max-width:600px){
  header{padding:8px 12px;gap:8px}
  header .logo{margin-right:auto}
  header nav{order:5;flex-basis:100%}
  .uname,.hm{display:none}
  main{padding:12px}
  .fg{grid-template-columns:1fr}
  .task{align-items:flex-start}
  .task .nm{flex:1 1 calc(100% - 50px)}
  .chs,.acts{width:100%}
  .acts .btn{flex:1;min-height:44px}
  .pills{display:grid;grid-template-columns:1fr 1fr}
  .pill{min-height:44px}
  .row .btn{flex:1 1 auto;min-height:44px}
  .glass{padding:22px}
  th,td{padding:6px;font-size:.8rem}
  #toasts{left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom))}
}