static/style.css

/* static/style.css – tambahan ringkas biar mirip SS */
body { font-family: system-ui, Segoe UI, Roboto, Arial, sans-serif; background:#f5f7fb; margin:0; }
.container { max-width: 980px; margin: 0 auto; padding: 24px; }

.hero { background:#4a6ea9; color:#fff; padding:28px 24px; border-radius:12px; }
.hero h1 { margin:0 0 8px; letter-spacing:1px; }
.nav a { color:#e8eefc; margin-right:16px; text-decoration:none; font-weight:600; }
.nav a[aria-disabled="true"] { opacity:.6; pointer-events:none; }

.welcome { text-align:center; padding:28px 0; }
.welcome h2 { margin:0 0 8px; color:#2b3852; }

.subjects h3 { text-align:center; color:#2b3852; margin-bottom:16px; }
.grid { display:grid; grid-template-columns: repeat(3, 1fr); gap:18px; }
.card { display:block; background:linear-gradient(180deg,#6b86bd,#5575b1); color:#fff; padding:22px; border-radius:12px; text-decoration:none; box-shadow:0 6px 16px rgba(0,0,0,.08); }
.card h4 { margin:0 0 8px; letter-spacing:.5px; }
.card p { margin:0; opacity:.95; }

.header { display:flex; justify-content:space-between; align-items:center; margin-bottom:14px; color:#fff;
          background:#6b86bd; padding:12px 16px; border-radius:10px; }
.header .link { color:#fff; text-decoration:none; }

.main { background:#fff; border-radius:12px; padding:16px; box-shadow:0 6px 16px rgba(0,0,0,.06); }
.chat-box { height:420px; overflow:auto; padding:8px; background:#f6f8fc; border-radius:10px; }
.msg { max-width:70%; margin:8px 0; padding:10px 12px; border-radius:14px; line-height:1.3; }
.msg.user { margin-left:auto; background:#4a6ea9; color:#fff; }
.msg.bot  { background:#e9eef8; color:#2b3852; }
.input-row { display:flex; gap:8px; margin-top:12px; }
.input-row input { flex:1; padding:10px 12px; border-radius:10px; border:1px solid #cbd5e1; }
.btn { background:#4a6ea9; color:#fff; border:none; padding:10px 14px; border-radius:10px; cursor:pointer; }
.btn:hover { filter:brightness(.95); }

.about { line-height:1.6; color:#2b3852; }
.about h3 { color:#4a6ea9; margin-bottom:8px; }
.about h4 { margin-top:24px; color:#344767; }
.bio { list-style:none; padding:0; margin:0; }
.bio li { margin-bottom:4px; }

/* ===========================================
   AUTH UI — Login & Register
   Fokus: tampilan saja (tanpa ubah HTML)
   =========================================== */

/* ---------- Design tokens ---------- */
:root {
  --auth-bg1:  #6c8bd6;
  --auth-bg2:  #405eae;
  --auth-card: #ffffff;
  --auth-text: #1f2937;
  --auth-muted:#6b7280;
  --auth-primary: #4f6fd0;
  --auth-primary-2: #3e5cc2;
  --auth-success-bg:#e8f7ee;
  --auth-success-fg:#11623c;
  --auth-error-bg:  #fdeaea;
  --auth-error-fg:  #8f1d1d;
  --auth-border: #e5e7eb;
  --shadow-1: 0 6px 20px rgba(0,0,0,.12);
  --shadow-2: 0 16px 48px rgba(0,0,0,.18);
  --radius-lg: 16px;
  --radius-md: 12px;
}

/* Dark mode otomatis */
@media (prefers-color-scheme: dark) {
  :root {
    --auth-bg1:  #0f1b3a;
    --auth-bg2:  #0b1330;
    --auth-card: #0f172a;
    --auth-text: #e5e7eb;
    --auth-muted:#a3a9b5;
    --auth-primary: #6d8cff;
    --auth-primary-2: #5876f3;
    --auth-success-bg:#0f2b20;
    --auth-success-fg:#a6f3c7;
    --auth-error-bg:  #2a1212;
    --auth-error-fg:  #ffb3b3;
    --auth-border: #1f2937;
    --shadow-1: 0 8px 26px rgba(0,0,0,.35);
    --shadow-2: 0 24px 60px rgba(0,0,0,.45);
  }
}

/* ---------- Background full ---------- */
.auth-bg {
  min-height: 100vh;
  padding: 32px 18px;
  display: grid;
  place-items: center;
  background: radial-gradient(1200px 800px at 10% 10%, rgba(255,255,255,.18), transparent 40%),
              radial-gradient(1000px 700px at 90% 20%, rgba(255,255,255,.12), transparent 45%),
              linear-gradient(160deg, var(--auth-bg1) 0%, var(--auth-bg2) 100%);
  position: relative;
  overflow: hidden;
}

/* Decorative blobs */
.auth-bg::before, .auth-bg::after {
  content: "";
  position: absolute;
  filter: blur(60px);
  opacity: .35;
  animation: floaty 14s ease-in-out infinite alternate;
}
.auth-bg::before {
  width: 480px; height: 480px;
  left: -120px; bottom: -120px;
  background: radial-gradient(circle at 30% 30%, #ffffff66, transparent 60%);
}
.auth-bg::after {
  width: 520px; height: 520px;
  right: -140px; top: -140px;
  background: radial-gradient(circle at 70% 70%, #ffffff55, transparent 60%);
  animation-duration: 18s;
}

@keyframes floaty {
  from { transform: translateY(-6px) translateX(0); }
  to   { transform: translateY(6px) translateX(4px); }
}

/* ---------- Card ---------- */
.auth-card {
  width: 100%;
  max-width: 440px;
  background: color-mix(in oklab, var(--auth-card) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid color-mix(in oklab, var(--auth-border) 70%, transparent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  padding: 26px 22px;
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
}
.auth-card::after{
  /* top accent line */
  content:"";
  position:absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--auth-primary), var(--auth-primary-2));
  opacity: .9;
}

/* micro-hover lift */
.auth-card:hover{
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

/* ---------- Titles ---------- */
.auth-title{
  margin: 2px 0 6px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: .2px;
  color: var(--auth-text);
}
.auth-subtitle{
  margin: 0 0 16px;
  color: var(--auth-muted);
  font-size: 14px;
}

/* ---------- Form ---------- */
.auth-card form{
  display: grid;
  gap: 12px;
  margin-top: 10px;
}

/* Input wrapper (adds subtle focus ring) */
.auth-input{
  position: relative;
}
.auth-card input{
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--auth-border);
  background: color-mix(in oklab, var(--auth-card) 98%, transparent);
  color: var(--auth-text);
  font-size: 14px;
  transition: border-color .15s ease, box-shadow .2s ease, background .2s ease;
}
.auth-card input::placeholder{
  color: color-mix(in oklab, var(--auth-muted) 80%, transparent);
}
.auth-card input:focus{
  outline: none;
  border-color: color-mix(in oklab, var(--auth-primary) 70%, #000 0%);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--auth-primary) 18%, transparent);
  background: color-mix(in oklab, var(--auth-card) 100%, transparent);
}

/* ---------- Button ---------- */
.auth-card .btn{
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-weight: 700;
  letter-spacing: .2px;
  border: none;
  cursor: pointer;
  background: linear-gradient(180deg, var(--auth-primary), var(--auth-primary-2));
  color: #fff;
  box-shadow: 0 8px 24px color-mix(in oklab, var(--auth-primary) 35%, transparent);
  transition: transform .06s ease, filter .2s ease, box-shadow .2s ease;
}
.auth-card .btn:hover{
  filter: brightness(.98);
  box-shadow: 0 10px 30px color-mix(in oklab, var(--auth-primary) 45%, transparent);
}
.auth-card .btn:active{
  transform: translateY(1px);
}

/* ---------- Helper text & links ---------- */
.muted{
  margin-top: 14px;
  text-align: center;
  color: var(--auth-muted);
  font-size: 13px;
}
.muted a{
  color: var(--auth-primary);
  text-decoration: none;
  font-weight: 600;
}
.muted a:hover{ text-decoration: underline; }

/* ---------- Flash messages ---------- */
.flash{
  margin: 8px 0 4px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-size: 13px;
  border: 1px solid transparent;
}
.flash.success{
  background: var(--auth-success-bg);
  color: var(--auth-success-fg);
  border-color: color-mix(in oklab, var(--auth-success-fg) 24%, transparent);
}
.flash.error{
  background: var(--auth-error-bg);
  color: var(--auth-error-fg);
  border-color: color-mix(in oklab, var(--auth-error-fg) 24%, transparent);
}

/* ---------- Small divider (opsional, jika nanti butuh) ---------- */
.auth-divider{
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  color: var(--auth-muted);
  font-size: 12px;
}
.auth-divider::before,
.auth-divider::after{
  content:"";
  height: 1px;
  background: color-mix(in oklab, var(--auth-border) 80%, transparent);
}

/* ---------- Responsive ---------- */
@media (max-width: 560px){
  .auth-card{ padding: 22px 18px; border-radius: 14px; }
  .auth-title{ font-size: 22px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  .auth-bg::before, .auth-bg::after{ animation: none; }
  .auth-card, .auth-card .btn{ transition: none; }
}

/* inset kanan–kiri untuk semua field di login & register */
.auth-card form{
  padding-inline: 10px;      /* kiri–kanan 10px */
}
.auth-card input,
.auth-card .btn{
  width: 100%;
  box-sizing: border-box;     /* pastikan hitung padding/border */
}