@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --navy: #0F1923;
  --navy-2: #162030;
  --navy-border: #1E2D3D;
  --surface: #FFFFFF;
  --surface-2: #F5F6F8;
  --border: #E2E5EA;
  --border-strong: #C8CDD6;
  --text: #0D1117;
  --text-muted: #6B7685;
  --text-subtle: #A0A8B4;
  --primary: #00A884;
  --primary-dark: #008069;
  --accent: #25D366;
  --error: #EF4444;
}

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

body {
  background: var(--navy);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  height: 100vh;
  overflow: hidden;
  display: flex;
  -webkit-font-smoothing: antialiased;
}

/* ─── Left Panel ──────────────────────────────────────── */
.split-left {
  width: 44%;
  background: var(--navy);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 3rem 3.5rem;
  overflow: hidden;
}

/* Dot-grid texture */
.split-left::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(37,211,102,0.16) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

/* Atmospheric glow at bottom-right */
.split-left::after {
  content: '';
  position: absolute;
  bottom: -25%;
  right: -25%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,168,132,0.08) 0%, transparent 65%);
  pointer-events: none;
}

.brand-top {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: fadeUp 0.6s ease forwards;
  opacity: 0;
}
.brand-top i { font-size: 1.1rem; color: var(--accent); }
.brand-top span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(37,211,102,0.7);
}

.brand-center {
  position: relative;
  z-index: 10;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.brand-title {
  font-size: 7rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
  letter-spacing: -4px;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.6s 0.1s ease forwards;
  opacity: 0;
}
.brand-title span { color: var(--accent); }
.brand-subtitle {
  font-size: 1rem;
  font-weight: 400;
  color: rgba(255,255,255,0.38);
  max-width: 26ch;
  line-height: 1.6;
  animation: fadeUp 0.6s 0.2s ease forwards;
  opacity: 0;
}

.brand-bottom {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  animation: fadeUp 0.6s 0.3s ease forwards;
  opacity: 0;
}
.brand-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand-stat .s-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.brand-stat .s-lbl {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: rgba(255,255,255,0.25);
}
.brand-stat-sep {
  width: 1px;
  height: 28px;
  background: rgba(255,255,255,0.1);
}

/* ─── Right Panel ─────────────────────────────────────── */
.split-right {
  width: 56%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Subtle top-left corner accent */
.split-right::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent) 0%, transparent 40%);
  opacity: 0.5;
}

.login-wrapper {
  width: 100%;
  max-width: 380px;
  padding: 2rem;
}

.header-block {
  margin-bottom: 2.5rem;
  animation: fadeUp 0.5s 0.15s ease forwards;
  opacity: 0;
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 2rem;
}
.login-brand i { font-size: 1.1rem; color: var(--accent); }
.login-brand span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
}
.header-block p {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* ─── Form ────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
  animation: fadeUp 0.5s 0.25s ease forwards;
  opacity: 0;
}
.form-group label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 0.45rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.input-wrapper i {
  position: absolute;
  left: 1rem;
  color: var(--text-subtle);
  font-size: 0.9rem;
  pointer-events: none;
  transition: color 0.2s;
  z-index: 1;
}
.form-group input {
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 2.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.92rem;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}
.form-group input:focus {
  background: var(--surface);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,168,132,0.12);
}
.form-group input:focus ~ i,
.form-group input:focus + i {
  color: var(--primary);
}

/* ─── Button ──────────────────────────────────────────── */
.btn {
  width: 100%;
  padding: 0.9rem 1.25rem;
  background: var(--navy);
  color: #fff;
  border: 1px solid var(--navy-border);
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  animation: fadeUp 0.5s 0.35s ease forwards;
  opacity: 0;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  opacity: 0;
  transition: opacity 0.2s;
}
.btn:hover::before { opacity: 1; }
.btn:hover { border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,168,132,0.22); }
.btn:active { transform: translateY(0); }
.btn span, .btn i { position: relative; z-index: 1; }
.btn i { font-size: 0.85rem; transition: transform 0.2s; }
.btn:hover i { transform: translateX(3px); }

/* ─── Error ───────────────────────────────────────────── */
#error-msg-container { margin-top: 1rem; }
.error {
  color: #B91C1C;
  background: #FEF2F2;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(239,68,68,0.25);
  font-size: 0.83rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: fadeUp 0.3s ease forwards;
}
.error i { font-size: 0.9rem; flex-shrink: 0; }

/* ─── Animations ──────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Mobile top bar (hidden on desktop) ─────────────── */
.mobile-top {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 0.9rem 1.5rem;
  background: var(--navy);
  border-bottom: 1px solid var(--navy-border);
  flex-shrink: 0;
}
.mobile-top i { font-size: 1.1rem; color: var(--accent); }
.mobile-top-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  flex: 1;
}
.mobile-top-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.3px;
}

/* ─── Responsive ──────────────────────────────────────── */

/* Tablet: reduce split proportions */
@media (max-width: 1024px) {
  .split-left { width: 38%; padding: 2.5rem 2.5rem; }
  .brand-title { font-size: 5.5rem; }
  .split-right { width: 62%; }
}

/* Narrow tablet / landscape mobile: collapse to form only */
@media (max-width: 768px) {
  body { flex-direction: column; overflow-y: auto; height: auto; min-height: 100vh; }

  .split-left { display: none; }

  .split-right {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    min-height: 100vh;
  }
  .split-right::before { display: none; }

  .mobile-top { display: flex; }

  .login-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 420px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 3rem;
  }

  .header-block { margin-bottom: 2rem; }
  h1 { font-size: 1.55rem; }
}

/* Small mobile */
@media (max-width: 420px) {
  .login-wrapper { padding: 2rem 1.25rem 2.5rem; }
  h1 { font-size: 1.4rem; }
  .form-group input { font-size: 0.85rem; }
  .btn { font-size: 0.88rem; padding: 0.85rem 1rem; }
}