/* NCD Plus Solution AI — theme from logo-ncdplussu.png */
:root {
  /* Navy (NCD PLUS text, plus sign) */
  --color-navy: #0a3d6e;
  --color-navy-dark: #062a4d;

  /* Cyan / light blue (logo ring — vibrant) */
  --color-cyan: #00b4e4;
  --color-cyan-light: #5ec8f2;
  --color-cyan-pale: #e8f6fc;

  /* Medium blue (SOLUTION text, ring shadow) */
  --color-blue: #1a6eb5;
  --color-blue-mid: #2d8fd4;

  --color-primary: var(--color-navy);
  --color-primary-dark: var(--color-navy-dark);
  --color-accent: var(--color-cyan);
  --color-accent-hover: #0099c7;

  --color-bg: #f2f8fc;
  --color-surface: #ffffff;
  --color-text: var(--color-navy);
  --color-muted: #4a7aad;
  --color-border: #c5dff0;

  --gradient-brand: linear-gradient(135deg, var(--color-cyan-light) 0%, var(--color-cyan) 45%, var(--color-blue) 100%);
  --gradient-header: linear-gradient(90deg, var(--color-navy) 0%, var(--color-blue) 55%, var(--color-cyan) 100%);

  --shadow-sm: 0 2px 8px rgba(10, 61, 110, 0.06);
  --shadow: 0 6px 24px rgba(10, 61, 110, 0.1);
  --shadow-lg: 0 10px 36px rgba(0, 180, 228, 0.14);

  --radius: 8px;
  --radius-lg: 12px;
  --font: 'Kanit', system-ui, -apple-system, sans-serif;
  --font-size-base: 12px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  touch-action: manipulation;
  -ms-touch-action: manipulation;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-cyan);
  text-decoration: none;
}

.container {
  width: min(960px, 92%);
  margin: 0 auto;
}

/* ── Header ── */
.site-header {
  background: var(--color-surface);
  border-bottom: 3px solid transparent;
  border-image: var(--gradient-brand) 1;
  padding: 0.75rem 0;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
  opacity: 0.92;
}

.brand-logo {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
}

.brand-text {
  font-size: 1.083rem;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.nav-links a {
  color: var(--color-muted);
  font-weight: 500;
  font-size: 1rem;
  padding: 0.333rem 0.5rem;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
  color: var(--color-cyan);
  background: var(--color-cyan-pale);
}

.nav-links a.active {
  color: var(--color-navy);
  background: var(--color-cyan-pale);
  font-weight: 600;
}

/* ── Main ── */
main {
  flex: 1;
  padding: 2rem 0;
}

.page-logo {
  display: block;
  height: 72px;
  width: auto;
  margin: 0 auto 1.25rem;
  object-fit: contain;
}

.page-logo-sm {
  height: 56px;
  margin-bottom: 1rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.card-accent-top {
  border-top: 3px solid var(--color-cyan);
}

.card h1 {
  margin: 0 0 0.333rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-navy);
  line-height: 1.3;
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.167rem;
  font-weight: 600;
  color: var(--color-navy);
}

.card .subtitle {
  color: var(--color-muted);
  margin: 0 0 1.25rem;
  font-size: 1rem;
  font-weight: 400;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.417rem;
  padding: 0.583rem 1rem;
  border-radius: var(--radius);
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s, border-color 0.2s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 3px 12px rgba(0, 180, 228, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-blue) 100%);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-navy);
}

.btn-outline:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  background: var(--color-cyan-pale);
}

.btn-navy {
  background: var(--color-navy);
  color: #fff;
}

.btn-navy:hover {
  background: var(--color-navy-dark);
  color: #fff;
}

.btn-block {
  width: 100%;
}

/* ── OAuth ── */
.oauth-grid {
  display: grid;
  gap: 0.583rem;
  margin-top: 1.25rem;
}

.oauth-btn {
  display: flex;
  align-items: center;
  gap: 0.667rem;
  padding: 0.667rem 0.833rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.oauth-btn:hover {
  border-color: var(--color-cyan);
  background: var(--color-cyan-pale);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--color-navy);
}

.oauth-btn.disabled {
  opacity: 0.45;
  pointer-events: none;
  filter: grayscale(0.3);
}

.oauth-icon {
  width: 26px;
  height: 26px;
  border-radius: 5px;
  display: grid;
  place-items: center;
  font-size: 0.667rem;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}

.oauth-google { background: #ea4335; }
.oauth-facebook { background: #1877f2; }
.oauth-apple { background: #000; }
.oauth-huawei { background: #cf0a2c; }
.oauth-xiaomi { background: #ff6900; }
.oauth-thaid { background: var(--color-navy); }

/* ── User profile ── */
.user-card {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.user-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-cyan-pale);
  border: 2px solid var(--color-cyan-light);
  object-fit: cover;
}

.user-avatar-placeholder {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}

.user-meta h2 {
  margin: 0 0 0.167rem;
  font-size: 1.167rem;
  font-weight: 600;
  color: var(--color-navy);
}

.user-meta p {
  margin: 0.083rem 0;
  color: var(--color-muted);
  font-size: 1rem;
}

/* ── Alerts ── */
.alert {
  padding: 0.667rem 0.833rem;
  border-radius: var(--radius);
  margin-bottom: 0.833rem;
  font-size: 1rem;
}

.alert-error {
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
}

.alert-success {
  background: var(--color-cyan-pale);
  color: var(--color-navy-dark);
  border: 1px solid var(--color-cyan-light);
}

/* ── Legal pages ── */
.legal-content h1 {
  font-size: 1.5rem;
}

.legal-content h2 {
  font-size: 1.083rem;
  margin: 1.5rem 0 0.417rem;
  color: var(--color-blue);
  font-weight: 600;
}

.legal-content h2:first-of-type {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--color-muted);
  font-size: 1rem;
}

.legal-content ul {
  padding-left: 1.25rem;
}

/* ── Footer ── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1rem 0;
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 1rem;
  color: var(--color-muted);
}

.site-footer a {
  color: var(--color-blue);
}

.site-footer a:hover {
  color: var(--color-cyan);
}

/* ── Layout ── */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.hero-banner {
  background: var(--gradient-brand);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  color: #fff;
  margin-bottom: 1rem;
}

.hero-banner h1 {
  color: #fff;
  margin: 0 0 0.333rem;
  font-size: 1.5rem;
}

.hero-banner .subtitle {
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

.hero-banner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  margin: 0.5rem 0 0;
}

.text-muted {
  color: var(--color-muted);
  font-size: 1rem;
}

.text-center {
  text-align: center;
}

.m-0 {
  margin: 0;
}

.actions {
  display: flex;
  gap: 0.583rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.card-narrow {
  max-width: 400px;
  margin: 0 auto;
}

.card-login {
  max-width: 380px;
  margin: 0 auto;
}

.legal-note {
  margin-top: 1.25rem;
  font-size: 0.917rem;
  color: var(--color-muted);
  text-align: center;
  line-height: 1.5;
}

/* ── Loading state ── */
.loading-card {
  max-width: 360px;
  margin: 3rem auto;
  text-align: center;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-cyan);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 720px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand-logo {
    height: 36px;
  }

  .nav-links {
    width: 100%;
  }
}