/* ============================================================
   ASHDEE GROUP Enterprise Cloud Dialer
   Premium enterprise SaaS design — Light theme
   Brand: ASHDEE GROUP — WE BUILD TRUST
   ============================================================ */

:root {
  --color-primary: #1a365d;
  --color-primary-dark: #0f2744;
  --color-primary-light: #2a4a7a;
  --color-accent: #2b6cb0;
  --color-success: #276749;
  --color-warning: #975a16;
  --color-danger: #c53030;
  --color-bg: #f7fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #1a202c;
  --color-text-muted: #718096;
  --color-text-light: #a0aec0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

/* ---------- Brand ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-center {
  justify-content: center;
  margin-bottom: 24px;
}

.logo-placeholder {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.tagline {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

/* ---------- Landing ---------- */
.landing {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.landing-header {
  padding: 20px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.landing-main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px;
  width: 100%;
}

.hero {
  text-align: center;
  margin-bottom: 48px;
}

.hero h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 28px;
}

.cta-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.feature-card h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.landing-footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.landing-footer .version {
  margin-top: 4px;
  font-size: 0.75rem;
  color: var(--color-text-light);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg);
  border-color: var(--color-primary-light);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- Auth ---------- */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  background: linear-gradient(160deg, #edf2f7 0%, #e2e8f0 100%);
}

.auth-container {
  width: 100%;
  max-width: 400px;
}

.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.auth-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 4px;
}

.auth-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.auth-form .form-group {
  margin-bottom: 16px;
}

.auth-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.auth-form input {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.15);
}

.form-error {
  background: #fff5f5;
  color: var(--color-danger);
  border: 1px solid #feb2b2;
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.auth-note {
  margin-top: 20px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.5;
}

.back-link {
  display: block;
  text-align: center;
  margin-top: 16px;
  font-size: 0.875rem;
}

/* ---------- Utilities ---------- */
.hidden {
  display: none !important;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .hero h2 {
    font-size: 1.5rem;
  }

  .landing-main {
    padding: 32px 16px;
  }

  .auth-card {
    padding: 24px 20px;
  }
}