/* ========================================
   TRELIze Landing Page — Velocity Intelligence Design
   Brand: Midnight (#0D1B2A), Deep Navy (#1B2D45),
          Electric Teal (#00C9A7), Signal Orange (#FF6B35),
          Slate (#3D5A80), Cool Gray (#8D99AE)
   Fonts: DM Sans (headings), Inter (body)
   ======================================== */

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Type Scale (fluid) */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* 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;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transition */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 720px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* === DARK THEME (default for Trelize brand — dark navy aesthetic) === */
html, [data-theme="dark"] {
  --color-bg:             #0D1B2A;
  --color-surface:        #1B2D45;
  --color-surface-2:      #233752;
  --color-surface-offset: #15253A;
  --color-border:         #2C4560;
  --color-divider:        #243752;

  --color-text:           #E8EDF3;
  --color-text-muted:     #8D99AE;
  --color-text-faint:     #5A6F8A;
  --color-text-inverse:   #0D1B2A;

  --color-primary:        #00C9A7;
  --color-primary-hover:  #00B396;
  --color-primary-active: #009D84;

  --color-accent:         #FF6B35;
  --color-accent-hover:   #E85A28;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

[data-theme="light"] {
  --color-bg:             #F5F7FA;
  --color-surface:        #FFFFFF;
  --color-surface-2:      #F0F2F5;
  --color-surface-offset: #E8ECF0;
  --color-border:         #D1D9E0;
  --color-divider:        #E0E5EB;

  --color-text:           #0D1B2A;
  --color-text-muted:     #3D5A80;
  --color-text-faint:     #8D99AE;
  --color-text-inverse:   #F5F7FA;

  --color-primary:        #00A88A;
  --color-primary-hover:  #008E74;
  --color-primary-active: #00745F;

  --color-accent:         #FF6B35;
  --color-accent-hover:   #E85A28;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

a, button, [role="button"] {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

::selection {
  background: rgba(0, 201, 167, 0.25);
  color: var(--color-text);
}

button { cursor: pointer; background: none; border: none; }

/* === CONTAINER === */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

.container-narrow {
  max-width: var(--content-narrow);
}

/* === HEADER === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 27, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

[data-theme="light"] .site-header {
  background: rgba(245, 247, 250, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text);
}

.logo svg { height: 28px; width: auto; }

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

.header-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
}

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

.mobile-menu-toggle {
  display: none;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .mobile-menu-toggle { display: flex; }
}

/* === MOBILE NAV === */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(13, 27, 42, 0.95);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-nav-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav-content {
  text-align: center;
}

.mobile-nav-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  color: var(--color-text);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.mobile-nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
}

.mobile-nav-links a:hover {
  color: var(--color-primary);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

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

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

.btn-block { width: 100%; }

/* === HERO === */
.hero {
  padding-top: clamp(120px, 15vh, 200px);
  padding-bottom: clamp(var(--space-16), 8vw, var(--space-32));
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: rgba(0, 201, 167, 0.1);
  border: 1px solid rgba(0, 201, 167, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  max-width: 850px;
  margin-inline: auto;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, #5BFFD3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--space-8);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.hero-trust {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  width: 100%;
  display: block;
}

/* === STATS BAR === */
.stats-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-8) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

/* === SECTIONS === */
.section {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
}

.section-alt {
  background: var(--color-surface);
}

.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 4vw, var(--space-16));
}

.section-header h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
}

/* === HOW IT WORKS STEPS === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}

.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(0, 201, 167, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.step-number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.step-card h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

@media (max-width: 900px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .steps-grid { grid-template-columns: 1fr; }
}

/* === FEATURES GRID === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.feature-item > i {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.feature-item h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.feature-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* === PRICING === */
.billing-toggle {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  background: var(--color-surface);
  border-radius: var(--radius-full);
  padding: var(--space-1);
  display: inline-flex;
  margin-left: auto;
  margin-right: auto;
  /* center the inline-flex: */
  width: 100%;
  justify-content: center;
}

.toggle-btn {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.toggle-btn.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.save-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  background: rgba(255, 107, 53, 0.2);
  color: var(--color-accent);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.toggle-btn.active .save-badge {
  background: rgba(0, 0, 0, 0.2);
  color: var(--color-text-inverse);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 820px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
}

.pricing-card-featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-lg);
}

.pricing-badge {
  position: absolute;
  top: calc(-1 * var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-card-header h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.pricing-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.pricing-amount {
  margin-bottom: var(--space-2);
}

.price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1;
}

.price-period {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.annual-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.pricing-card .btn {
  margin-top: var(--space-2);
  margin-bottom: var(--space-6);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.45;
}

.pricing-features li i {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.coming-soon-feature {
  opacity: 0.7;
}

.coming-soon-feature i {
  color: var(--color-text-faint) !important;
}

.coming-soon-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(255, 107, 53, 0.15);
  color: var(--color-accent);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  margin-left: var(--space-1);
  vertical-align: middle;
}

@media (max-width: 640px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

/* === COMPARISON TABLE === */
.comparison-table-wrap {
  margin-top: clamp(var(--space-10), 4vw, var(--space-16));
}

.comparison-heading {
  text-align: center;
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.comparison-table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  width: 100%;
  min-width: 500px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: var(--color-surface);
  position: sticky;
  top: 0;
}

.comparison-table td:first-child {
  font-weight: 500;
  color: var(--color-text);
}

.comparison-table td {
  color: var(--color-text-muted);
}

.check-icon {
  color: var(--color-primary);
}

.dash {
  color: var(--color-text-faint);
  font-weight: 400;
}

/* === PERSONAS === */
.personas-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.persona-card {
  padding: var(--space-6);
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

[data-theme="dark"] .persona-card,
html:not([data-theme="light"]) .persona-card {
  background: var(--color-surface-offset);
}

.persona-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(0, 201, 167, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.persona-card h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.persona-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .personas-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .personas-grid { grid-template-columns: 1fr; }
}

/* === COMPARE === */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.compare-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.compare-card h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.compare-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

@media (max-width: 768px) {
  .compare-grid { grid-template-columns: 1fr; }
}

/* === FAQ === */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

[data-theme="dark"] .faq-item,
html:not([data-theme="light"]) .faq-item {
  background: var(--color-surface-offset);
}

.faq-item summary {
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.faq-item summary::after {
  content: '+';
  font-size: var(--text-lg);
  color: var(--color-text-faint);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-answer {
  padding: 0 var(--space-6) var(--space-5);
}

.faq-answer p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* === CTA SECTION === */
.cta-section {
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.cta-content {
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.cta-content > p:first-of-type {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.cta-sub {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
}

/* === FOOTER === */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 280px;
}

.footer-brand svg {
  height: 24px;
  width: auto;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links h5 {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-inline: auto;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* === UTILITIES === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}