/* ============ Base & Theme ============ */
:root{
  --bg: #0f172a;            /* slate-900 */
  --panel: #111827;         /* gray-900 */
  --panel-2: #0b1220;       /* subtle depth */
  --text: #e5e7eb;          /* gray-200 */
  --muted: #9ca3af;         /* gray-400 */
  --accent: #6366f1;        /* indigo-500 */
  --accent-2: #8b5cf6;      /* violet-500 */
  --ring: rgba(99,102,241,.55);
  --error: #ef4444;         /* red-500 */
  --shadow: 0 10px 30px rgba(0,0,0,.35);

  --radius: 16px;
  --gap: 14px;
  --field-h: 44px;
  --transition: 180ms ease;
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f3f4f6;          /* gray-100 */
    --panel: #ffffff;
    --panel-2: #f8fafc;
    --text: #0f172a;        /* slate-900 */
    --muted: #6b7280;       /* gray-500 */
    --ring: rgba(99,102,241,.35);
    --shadow: 0 10px 30px rgba(2,6,23,.12);
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce){
  * { animation: none !important; transition: none !important; }
}

/* ============ Page Layout ============ */
* { box-sizing: border-box; }
html, body {
  height: 100%;
}
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(99,102,241,.15), transparent 60%),
    radial-gradient(800px 400px at 110% 10%, rgba(139,92,246,.12), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--panel-2));
  display: grid;
  place-items: center;
  padding: 24px;
}

/* ============ Card ============ */
.login-container{
  width: 100%;
  max-width: 380px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(148,163,184,.18);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 28px);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.login-container::before{
  /* subtle accent glow */
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 240px; height: 240px;
  background: radial-gradient(closest-side, rgba(99,102,241,.22), transparent 70%);
  filter: blur(18px);
  z-index: -1;
}

.login-container h2{
  margin: 0 0 16px 0;
  font-size: clamp(22px, 2.8vw, 26px);
  letter-spacing: .2px;
}

/* ============ Form ============ */
.form-group{
  display: grid;
  gap: 8px;
  margin-bottom: var(--gap);
}

label{
  font-size: 0.95rem;
  color: var(--muted);
}

input[type="text"],
input[type="password"]{
  height: var(--field-h);
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(148,163,184,.25);
  background: rgba(2,6,23,.35);
  color: var(--text);
  padding: 0 12px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

@media (prefers-color-scheme: light){
  input[type="text"],
  input[type="password"]{
    background: #ffffff;
  }
}

input::placeholder{ color: #94a3b8; }
input:focus{
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
  background: rgba(2,6,23,.45);
}

/* Show required invalid quickly but not too aggressively */
input:required:user-invalid{
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(239,68,68,.25);
}

/* ============ Button ============ */
button#submit{
  height: calc(var(--field-h) + 2px);
  width: 100%;
  border: 0;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: .2px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  cursor: pointer;
  transition: transform var(--transition), filter var(--transition), box-shadow var(--transition);
  box-shadow: 0 8px 24px rgba(99,102,241,.35);
}

button#submit:hover{
  filter: brightness(1.04);
  transform: translateY(-1px);
}

button#submit:active{
  transform: translateY(0);
  filter: brightness(.98);
}

button#submit:focus-visible{
  outline: none;
  box-shadow: 0 0 0 4px var(--ring), 0 8px 24px rgba(99,102,241,.35);
}

button#submit:disabled{
  opacity: .6;
  cursor: not-allowed;
}

/* ============ Helpers ============ */
@media (max-width: 420px){
  .login-container{ padding: 18px; }
}

/* Optional small print / footer slots if needed later */
.small {
  font-size: .85rem;
  color: var(--muted);
  text-align: center;
  margin-top: 10px;
}


/* ===== OAuth section ===== */
.oauth{
  margin-top: 10px;
}

.divider{
  display: grid;
  align-items: center;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  margin: 14px 0;
  color: var(--muted);
  font-size: .92rem;
}
.divider::before,
.divider::after{
  content: "";
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(148,163,184,.35), transparent);
}

.google-btn{
  height: calc(var(--field-h) + 2px);
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(148,163,184,.35);
  background: #ffffff;
  color: #0f172a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: .2px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition), background var(--transition);
}

@media (prefers-color-scheme: dark){
  .google-btn{
    background: #0b1220;
    color: var(--text);
    border-color: rgba(148,163,184,.25);
  }
}

.google-btn:hover{
  filter: brightness(1.03);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(2,6,23,.18);
}
.google-btn:active{
  transform: translateY(0);
  filter: brightness(.98);
}
.google-btn:focus-visible{
  outline: none;
  box-shadow: 0 0 0 4px var(--ring);
}

.google-btn svg{
  width: 20px; height: 20px;
  display: block;
  fill: currentColor; /* pakai warna teks agar adaptif tema */
}


/* ===== WhatsApp button ===== */
.wa-btn{
  height: calc(var(--field-h) + 2px);
  width: 100%;
  border: 0;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: .2px;
  cursor: pointer;
  transition: transform var(--transition), filter var(--transition), box-shadow var(--transition);
  background: linear-gradient(135deg, #25D366, #1EBE5D);
  color: #0b1220;
  box-shadow: 0 8px 22px rgba(37, 211, 102, .35);
  margin-top: 10px;
}

@media (prefers-color-scheme: dark){
  .wa-btn{ color: #05130a; } /* tetap kontras di dark mode */
}

.wa-btn:hover{
  transform: translateY(-1px);
  filter: brightness(1.03);
}
.wa-btn:active{
  transform: translateY(0);
  filter: brightness(.98);
}
.wa-btn:focus-visible{
  outline: none;
  box-shadow: 0 0 0 4px rgba(37,211,102,.35);
}

.wa-btn svg{
  width: 20px; height: 20px;
  display: block;
  fill: currentColor;
}