/* ============================================================
   SIMKAS — Premium UI System
   Emerald + Champagne Gold · Glassmorphism · Motion
   Used by: portal (landing), manage/login, student/login
   ============================================================ */

:root {
  /* Backdrop */
  --bg-0: #04130d;
  --bg-1: #072016;
  --bg-2: #0b3123;
  --bg-3: #0f4030;

  /* Brand — emerald */
  --emerald: #2abb9b;
  --emerald-deep: #12977a;
  --emerald-bright: #4fe6b6;

  /* Luxe accent — champagne gold */
  --gold: #e9c46a;
  --gold-bright: #f6dd9b;
  --gold-deep: #c9a227;

  /* Ink */
  --text: #ecfaf3;
  --text-dim: rgba(236, 250, 243, 0.66);
  --text-faint: rgba(236, 250, 243, 0.40);

  /* Glass */
  --glass: rgba(255, 255, 255, 0.055);
  --glass-strong: rgba(255, 255, 255, 0.09);
  --glass-border: rgba(255, 255, 255, 0.14);
  --hairline: rgba(233, 196, 106, 0.55);

  --radius: 22px;
  --radius-sm: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-soft: 0 30px 80px -30px rgba(0, 0, 0, 0.75);
  --shadow-glow: 0 0 0 1px rgba(255,255,255,0.05), 0 24px 60px -24px rgba(42, 187, 155, 0.45);

  --font-head: "Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-0);
  background-image:
    radial-gradient(120% 120% at 12% 8%, var(--bg-3) 0%, var(--bg-1) 42%, var(--bg-0) 100%);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- Animated aurora field ---- */
.aurora { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.aurora span {
  position: absolute;
  display: block;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  will-change: transform;
}
.aurora .a1 {
  width: 46vw; height: 46vw; left: -8vw; top: -10vw;
  background: radial-gradient(circle at 30% 30%, var(--emerald), transparent 65%);
  animation: drift1 22s var(--ease) infinite alternate;
}
.aurora .a2 {
  width: 40vw; height: 40vw; right: -10vw; top: 6vw;
  background: radial-gradient(circle at 60% 40%, #1f7d63, transparent 66%);
  animation: drift2 26s var(--ease) infinite alternate;
}
.aurora .a3 {
  width: 34vw; height: 34vw; left: 30vw; bottom: -14vw;
  background: radial-gradient(circle at 50% 50%, rgba(233,196,106,0.5), transparent 68%);
  opacity: 0.28;
  animation: drift3 30s var(--ease) infinite alternate;
}

@keyframes drift1 { to { transform: translate3d(8vw, 6vh, 0) scale(1.15); } }
@keyframes drift2 { to { transform: translate3d(-7vw, 8vh, 0) scale(1.1); } }
@keyframes drift3 { to { transform: translate3d(-6vw, -6vh, 0) scale(1.2); } }

/* ---- Fine grain overlay ---- */
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: 0.05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* thin top luxe line */
body::before {
  content: "";
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 3;
  background: linear-gradient(90deg, transparent, var(--gold), var(--emerald-bright), var(--gold), transparent);
  opacity: 0.7;
}

.shell { position: relative; z-index: 2; }

/* ---- Shared brand mark ---- */
.brandmark {
  position: relative;
  display: grid; place-items: center;
}
.brandmark img { display: block; width: 100%; height: 100%; object-fit: contain; }
.brandmark .halo {
  position: absolute; inset: -18%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,230,182,0.35), transparent 62%);
  filter: blur(14px);
  animation: pulse 4.5s ease-in-out infinite;
  z-index: -1;
}
@keyframes pulse { 0%,100% { opacity: 0.5; transform: scale(1);} 50% { opacity: 0.95; transform: scale(1.08);} }

/* Eyebrow / tracking label */
.eyebrow {
  font-family: var(--font-head);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--gold-bright);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before, .eyebrow::after {
  content: ""; width: 26px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold));
}
.eyebrow.solo::after { display: none; }

/* Gold gradient text */
.grad-gold {
  background: linear-gradient(100deg, var(--gold-bright), var(--gold), var(--gold-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.grad-emerald {
  background: linear-gradient(100deg, #ffffff, var(--emerald-bright));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============================================================
   LANDING (portal)
   ============================================================ */
.portal {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 56px 22px 40px;
  text-align: center;
}
.portal .brandmark { width: 108px; height: 108px; margin-bottom: 30px; animation: fadeUp 0.9s var(--ease) both; }

.portal h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 1.04; letter-spacing: -0.02em;
  margin: 18px 0 14px;
  animation: fadeUp 0.9s var(--ease) 0.12s both;
}
.portal .eyebrow { animation: fadeUp 0.9s var(--ease) 0.02s both; }
.portal .sub {
  max-width: 560px;
  color: var(--text-dim);
  font-size: clamp(0.95rem, 1.4vw, 1.08rem);
  line-height: 1.7;
  margin: 0 auto 44px;
  animation: fadeUp 0.9s var(--ease) 0.2s both;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  width: 100%; max-width: 940px;
}

.pcard {
  position: relative;
  display: flex; flex-direction: column; align-items: flex-start;
  text-align: left;
  padding: 30px 26px 26px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--glass-strong), var(--glass));
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  color: var(--text);
  text-decoration: none;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), border-color 0.5s var(--ease);
  animation: fadeUp 0.9s var(--ease) both;
}
.pcard:nth-child(1) { animation-delay: 0.30s; }
.pcard:nth-child(2) { animation-delay: 0.40s; }
.pcard:nth-child(3) { animation-delay: 0.50s; }

/* gold hairline sweep on top */
.pcard::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--hairline), transparent);
  opacity: 0; transition: opacity 0.5s var(--ease);
}
/* radial glow that follows hover */
.pcard::after {
  content: ""; position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(79,230,182,0.16), transparent 60%);
  transition: opacity 0.5s var(--ease);
  pointer-events: none;
}
.pcard:hover {
  transform: translateY(-8px);
  border-color: rgba(233,196,106,0.4);
  box-shadow: var(--shadow-glow);
}
.pcard:hover::before, .pcard:hover::after { opacity: 1; }

.pcard .ic {
  width: 58px; height: 58px; border-radius: 16px;
  display: grid; place-items: center;
  margin-bottom: 22px;
  color: var(--bg-0);
  background: linear-gradient(150deg, var(--emerald-bright), var(--emerald-deep));
  box-shadow: 0 12px 30px -12px rgba(42,187,155,0.8), inset 0 1px 0 rgba(255,255,255,0.4);
  transition: transform 0.5s var(--ease);
}
.pcard:hover .ic { transform: translateY(-3px) rotate(-4deg) scale(1.05); }
.pcard .ic svg { width: 28px; height: 28px; }

.pcard h3 {
  font-family: var(--font-head);
  font-weight: 700; font-size: 1.22rem; letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.pcard p { color: var(--text-dim); font-size: 0.9rem; line-height: 1.55; }
.pcard .go {
  margin-top: 20px;
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-head); font-weight: 600; font-size: 0.82rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gold-bright);
}
.pcard .go svg { width: 16px; height: 16px; transition: transform 0.45s var(--ease); }
.pcard:hover .go svg { transform: translateX(6px); }

.portal-foot {
  margin-top: 46px;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 10px 26px;
  color: var(--text-faint); font-size: 0.82rem;
  animation: fadeUp 0.9s var(--ease) 0.6s both;
}
.portal-foot .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--gold); opacity: 0.6; }
.portal-foot b { color: var(--text-dim); font-weight: 500; }

/* ============================================================
   LOGIN (split screen) — shared by admin & student
   ============================================================ */
.auth {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
}

/* Left — brand story panel */
.auth-brand {
  position: relative;
  padding: 60px 58px;
  display: flex; flex-direction: column; justify-content: space-between;
  overflow: hidden;
  border-right: 1px solid rgba(255,255,255,0.06);
}
.auth-brand .veil {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(70% 60% at 20% 12%, rgba(79,230,182,0.16), transparent 60%),
    radial-gradient(60% 60% at 90% 90%, rgba(233,196,106,0.12), transparent 60%);
}
.auth-brand .top { display: flex; align-items: center; gap: 16px; animation: fadeUp 0.8s var(--ease) both; }
.auth-brand .brandmark { width: 62px; height: 62px; flex: none; }
.auth-brand .top .n { font-family: var(--font-head); }
.auth-brand .top .n small {
  display: block; font-size: 11px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--gold-bright);
}
.auth-brand .top .n b { font-size: 1.02rem; font-weight: 700; letter-spacing: 0.01em; }

.auth-brand .hero { max-width: 460px; }
.auth-brand .hero .eyebrow { animation: fadeUp 0.8s var(--ease) 0.1s both; }
.auth-brand .hero h2 {
  font-family: var(--font-head);
  font-weight: 800; font-size: clamp(1.9rem, 3vw, 2.9rem);
  line-height: 1.08; letter-spacing: -0.02em;
  margin: 20px 0 18px;
  animation: fadeUp 0.8s var(--ease) 0.18s both;
}
.auth-brand .hero p {
  color: var(--text-dim); font-size: 1.02rem; line-height: 1.75;
  animation: fadeUp 0.8s var(--ease) 0.26s both;
}
.auth-brand .marks {
  display: flex; flex-direction: column; gap: 14px; margin-top: 30px;
  animation: fadeUp 0.8s var(--ease) 0.34s both;
}
.auth-brand .marks .m { display: flex; align-items: center; gap: 13px; color: var(--text-dim); font-size: 0.92rem; }
.auth-brand .marks .m i {
  width: 26px; height: 26px; flex: none; border-radius: 8px; display: grid; place-items: center;
  background: rgba(79,230,182,0.14); border: 1px solid rgba(79,230,182,0.28);
}
.auth-brand .marks .m i svg { width: 14px; height: 14px; color: var(--emerald-bright); }
.auth-brand .foot { color: var(--text-faint); font-size: 0.8rem; animation: fadeUp 0.8s var(--ease) 0.5s both; }

/* Right — form panel */
.auth-form {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  padding: 48px 40px;
}
.auth-card {
  width: 100%; max-width: 420px;
  padding: 42px 38px 38px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--glass-strong), var(--glass));
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  box-shadow: var(--shadow-soft);
  animation: fadeUp 0.9s var(--ease) 0.15s both;
}
.auth-card .k {
  font-family: var(--font-head); font-size: 11px; font-weight: 600;
  letter-spacing: 0.28em; text-transform: uppercase; color: var(--gold-bright);
}
.auth-card h1 {
  font-family: var(--font-head); font-weight: 800;
  font-size: 1.85rem; letter-spacing: -0.01em; margin: 10px 0 6px;
}
.auth-card .lead { color: var(--text-dim); font-size: 0.94rem; margin-bottom: 26px; }

.field { position: relative; margin-bottom: 18px; }
.field label {
  display: block; font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 9px;
}
.field .wrap { position: relative; }
.field .wrap > svg {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 18px; height: 18px; color: var(--text-faint);
  transition: color 0.35s var(--ease);
  pointer-events: none;
}
.field input {
  width: 100%;
  padding: 15px 16px 15px 46px;
  font-family: var(--font-body); font-size: 0.98rem;
  color: var(--text);
  background: rgba(3, 18, 13, 0.55);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.35s var(--ease), box-shadow 0.35s var(--ease), background 0.35s var(--ease);
}
.field input::placeholder { color: var(--text-faint); }
.field input:focus {
  border-color: rgba(79,230,182,0.6);
  background: rgba(3, 18, 13, 0.7);
  box-shadow: 0 0 0 4px rgba(42,187,155,0.16);
}
.field input:focus + svg,
.field .wrap:focus-within > svg { color: var(--emerald-bright); }

.btn-premium {
  position: relative;
  width: 100%; margin-top: 8px;
  padding: 16px 20px;
  font-family: var(--font-head); font-weight: 700; font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--bg-0);
  border: none; border-radius: var(--radius-sm);
  cursor: pointer;
  background: linear-gradient(120deg, var(--emerald-bright), var(--emerald) 55%, var(--emerald-deep));
  box-shadow: 0 16px 34px -14px rgba(42,187,155,0.85), inset 0 1px 0 rgba(255,255,255,0.45);
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
}
.btn-premium svg { width: 18px; height: 18px; }
.btn-premium::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: -60%; width: 45%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.55), transparent);
  transform: skewX(-20deg);
  animation: shimmer 3.6s ease-in-out infinite;
}
.btn-premium:hover { transform: translateY(-2px); box-shadow: 0 22px 42px -14px rgba(42,187,155,1); }
.btn-premium:active { transform: translateY(0); }

.alert-premium {
  display: flex; align-items: center; gap: 11px;
  padding: 13px 16px; margin-bottom: 22px;
  border-radius: var(--radius-sm);
  background: rgba(229, 78, 78, 0.12);
  border: 1px solid rgba(229, 78, 78, 0.4);
  color: #ffd7d7; font-size: 0.9rem;
  animation: fadeUp 0.5s var(--ease) both;
}
.alert-premium svg { width: 18px; height: 18px; flex: none; color: #ff8f8f; }

.auth-back {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 24px;
  color: var(--text-faint); font-size: 0.85rem; text-decoration: none;
  transition: color 0.35s var(--ease), gap 0.35s var(--ease);
}
.auth-back:hover { color: var(--gold-bright); gap: 12px; }
.auth-back svg { width: 15px; height: 15px; }

/* ---- Motion primitives ---- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
@keyframes shimmer { 0% { left: -60%; } 55%, 100% { left: 130%; } }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .portal-grid { grid-template-columns: 1fr; max-width: 440px; }
  .auth { grid-template-columns: 1fr; }
  .auth-brand { display: none; }
  .auth-form { padding: 40px 22px; min-height: 100vh; }
}
@media (max-width: 480px) {
  .portal { padding: 44px 18px; }
  .auth-card { padding: 34px 24px 30px; }
  .field.row-2 { }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}