/* ==========================================================================
   TTT Solutions — Design System
   One shared source of visual truth for the public site, client portal,
   engineer dashboard and admin dashboard. Keep component styles here;
   page-specific tweaks belong in app.css.
   ========================================================================== */

:root {
  /* Color — neutrals */
  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-muted: #f1f5f9;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;

  /* Color — brand */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-darker: #1e40af;
  --color-primary-light: #eff6ff;
  --color-accent: #0d9488;
  --color-accent-light: #f0fdfa;

  /* Color — semantic */
  --color-success: #16a34a;
  --color-success-light: #f0fdf4;
  --color-warning: #d97706;
  --color-warning-light: #fffbeb;
  --color-danger: #dc2626;
  --color-danger-light: #fef2f2;
  --color-info: #2563eb;
  --color-info-light: #eff6ff;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.25rem;
  --leading-tight: 1.2;
  --leading-normal: 1.55;

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-full: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
  --shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.25);

  /* Layout */
  --container-max: 1120px;
  --header-height: 72px;
  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
}

/* ── Reset ──────────────────────────────────────────────────────────── */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img,
picture,
svg {
  max-width: 100%;
  display: block;
}

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

a:hover {
  color: var(--color-primary-dark);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-4);
  line-height: var(--leading-tight);
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 1000;
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ── Layout helpers ─────────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-16);
}

@media (max-width: 640px) {
  .section {
    padding-block: var(--space-10);
  }
}

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

.stack {
  display: flex;
  flex-direction: column;
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ── Buttons ────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

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

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

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

.btn-secondary:hover {
  background: #1e293b;
  color: #fff;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

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

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  background: var(--color-bg-muted);
  color: var(--color-text);
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: var(--text-base);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ── Cards ──────────────────────────────────────────────────────────── */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.card-compact {
  padding: var(--space-6);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

/* ── Badges / status pills ─────────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.01em;
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge-success { background: var(--color-success-light); color: var(--color-success); }
.badge-warning { background: var(--color-warning-light); color: var(--color-warning); }
.badge-danger  { background: var(--color-danger-light); color: var(--color-danger); }
.badge-info    { background: var(--color-info-light); color: var(--color-info); }

/* ── Forms ──────────────────────────────────────────────────────────── */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-control {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: var(--text-base);
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-help {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger);
  margin-top: var(--space-2);
}

/* ── Alerts ─────────────────────────────────────────────────────────── */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
}

.alert-success { background: var(--color-success-light); color: #14532d; border-color: #bbf7d0; }
.alert-warning { background: var(--color-warning-light); color: #78350f; border-color: #fde68a; }
.alert-danger  { background: var(--color-danger-light); color: #7f1d1d; border-color: #fecaca; }
.alert-info    { background: var(--color-info-light); color: #1e3a8a; border-color: #bfdbfe; }

/* ── Empty states ───────────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-bg-subtle);
}

.empty-state-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  border-radius: 50%;
  background: var(--color-bg-muted);
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Site header / nav ──────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--text-sm);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.main-nav-links {
  display: flex;
  gap: var(--space-6);
}

.main-nav-links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 600;
}

.main-nav-links a:hover {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  position: relative;
  transition: transform var(--transition-fast);
}

.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

@media (max-width: 860px) {
  .main-nav-links,
  .main-nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header.is-open .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4) var(--space-6) var(--space-6);
    box-shadow: var(--shadow-md);
  }

  .site-header.is-open .main-nav-links,
  .site-header.is-open .main-nav-cta {
    display: flex;
    flex-direction: column;
    width: 100%;
  }

  .site-header.is-open .main-nav-cta .btn {
    width: 100%;
  }
}

/* ── Footer ─────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12);
  background: var(--color-bg-subtle);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
}

.site-footer p {
  margin: 0;
  font-size: var(--text-sm);
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ── WhatsApp floating button ──────────────────────────────────────── */

.whatsapp-float {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 60;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: #25d366;
  color: #fff;
  border-radius: var(--radius-full);
  padding: 0.85rem 1.1rem;
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: transform var(--transition-fast);
}

.whatsapp-float:hover {
  transform: translateY(-2px);
  color: #fff;
}

@media (max-width: 640px) {
  .whatsapp-float span {
    display: none;
  }

  .whatsapp-float {
    padding: 0.9rem;
  }
}

/* ── Auth / portal cards (login, track query) ─────────────────────── */

.auth-shell {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-6);
  background: var(--color-bg-subtle);
}

.auth-card {
  width: 100%;
  max-width: 420px;
}

.auth-card .card {
  box-shadow: var(--shadow-md);
}

/* ── Coming-soon / placeholder panel ───────────────────────────────── */

.coming-soon {
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-bg-subtle);
  padding: var(--space-8);
  text-align: center;
}

/* ── Utility ────────────────────────────────────────────────────────── */

.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--text-sm); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }