/* ===================================================
   Custom Cashier — Design Tokens & Component Styles
   Art direction: Deep navy, warm amber/gold accent,
   premium business-grade, confident typography.
   =================================================== */

/* --- TYPE SCALE --- */
:root {
  --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);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* --- SPACING --- */
  --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;

  /* --- FONTS --- */
  --font-display: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

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

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

  /* --- CONTENT WIDTHS --- */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* --- DARK THEME (default for CC) --- */
:root, [data-theme="dark"] {
  --color-bg:             #0d1117;
  --color-surface:        #151b23;
  --color-surface-2:      #1a2230;
  --color-surface-offset: #1e2636;
  --color-surface-dynamic: #252e3e;
  --color-divider:        #2a3444;
  --color-border:         #334155;

  --color-text:           #e2e8f0;
  --color-text-muted:     #8b9ab5;
  --color-text-faint:     #526078;
  --color-text-inverse:   #0d1117;

  /* Primary: Warm Amber/Gold */
  --color-primary:        #e5a336;
  --color-primary-hover:  #d4922a;
  --color-primary-active: #c07f1e;
  --color-primary-highlight: #2e2518;

  --color-success:        #4ade80;
  --color-error:          #f87171;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

/* --- LIGHT THEME --- */
[data-theme="light"] {
  --color-bg:             #f8f7f4;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafaf8;
  --color-surface-offset: #f0eeea;
  --color-surface-dynamic: #e6e4df;
  --color-divider:        #dcd9d5;
  --color-border:         #c8c4bc;

  --color-text:           #1a1814;
  --color-text-muted:     #6b6860;
  --color-text-faint:     #9c9890;
  --color-text-inverse:   #f8f7f4;

  --color-primary:        #b07d1a;
  --color-primary-hover:  #946812;
  --color-primary-active: #7a560e;
  --color-primary-highlight: #f5ecd4;

  --color-success:        #22c55e;
  --color-error:          #ef4444;

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #f8f7f4;
    --color-surface:        #ffffff;
    --color-surface-2:      #fafaf8;
    --color-surface-offset: #f0eeea;
    --color-surface-dynamic: #e6e4df;
    --color-divider:        #dcd9d5;
    --color-border:         #c8c4bc;
    --color-text:           #1a1814;
    --color-text-muted:     #6b6860;
    --color-text-faint:     #9c9890;
    --color-text-inverse:   #f8f7f4;
    --color-primary:        #b07d1a;
    --color-primary-hover:  #946812;
    --color-primary-active: #7a560e;
    --color-primary-highlight: #f5ecd4;
    --color-success:        #22c55e;
    --color-error:          #ef4444;
    --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
    --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
    --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
  }
}

/* ===================================================
   GLOBAL STYLES
   =================================================== */

body {
  font-family: var(--font-body);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
}

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

/* ===================================================
   HEADER / NAV
   =================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid oklch(from var(--color-border) l c h / 0.3);
  transition: box-shadow 0.3s var(--ease-out);
}
.site-header--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}
.logo-accent {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-interactive);
}
.nav-links a:hover {
  color: var(--color-text);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.nav-cta:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.nav-cta:active {
  transform: translateY(0);
}

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Mobile nav */
.mobile-menu-btn {
  display: none;
  color: var(--color-text);
  padding: var(--space-2);
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta-desktop { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: var(--space-6);
    gap: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open .nav-cta-mobile {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: 600;
    border-radius: var(--radius-md);
    text-align: center;
    justify-content: center;
  }
}
@media (min-width: 769px) {
  .nav-cta-mobile { display: none; }
}

/* ===================================================
   HERO
   =================================================== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, oklch(from var(--color-bg) l c h / 0.4) 0%, var(--color-bg) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-24) var(--space-6) var(--space-16);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary-highlight);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.25);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  width: fit-content;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  max-width: 18ch;
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.btn:active {
  transform: translateY(0);
}

.btn-primary {
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: 0 4px 24px oklch(from var(--color-primary) l c h / 0.3);
}

.btn-outline {
  padding: var(--space-3) var(--space-6);
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* ===================================================
   SECTIONS
   =================================================== */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
  padding-inline: var(--space-6);
}
.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-10);
}

/* ===================================================
   HOW IT WORKS — Steps
   =================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  counter-reset: step;
}
@media (max-width: 900px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 540px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }
}

.step-card {
  counter-increment: step;
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-border) l c h / 0.4);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}
.step-card::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-2xl);
  color: oklch(from var(--color-primary) l c h / 0.2);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-4);
}

.step-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}
.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===================================================
   FEATURES — Asymmetric Layout
   =================================================== */
.features-layout {
  display: grid;
  gap: var(--space-6);
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}
.feature-row.reverse {
  direction: rtl;
}
.feature-row.reverse > * {
  direction: ltr;
}
@media (max-width: 768px) {
  .feature-row {
    grid-template-columns: 1fr;
  }
  .feature-row.reverse {
    direction: ltr;
  }
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-border) l c h / 0.4);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}
.feature-card .feature-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.feature-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}
.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.feature-large-card {
  grid-column: span 2;
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-border) l c h / 0.4);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
@media (max-width: 768px) {
  .feature-large-card {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }
}
.feature-large-card img {
  border-radius: var(--radius-md);
  width: 100%;
  height: auto;
}
.feature-large-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}
.feature-large-card p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===================================================
   CASE STUDY
   =================================================== */
.case-study {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid oklch(from var(--color-border) l c h / 0.4);
}
@media (max-width: 768px) {
  .case-study {
    grid-template-columns: 1fr;
  }
}

.case-study-img {
  overflow: hidden;
}
.case-study-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
}

.case-study-content {
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.case-study-content .case-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.case-study-content h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}
.case-study-content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.stat-row {
  display: flex;
  gap: var(--space-8);
}
.stat {
  display: flex;
  flex-direction: column;
}
.stat-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-primary);
  line-height: 1.2;
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ===================================================
   CHANNELS
   =================================================== */
.channels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
@media (max-width: 768px) {
  .channels-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .channels-grid {
    grid-template-columns: 1fr;
  }
}

.channel-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-border) l c h / 0.4);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.channel-card svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--color-primary);
}
.channel-card span {
  font-weight: 500;
  font-size: var(--text-sm);
}

/* ===================================================
   APPLICATION / CTA
   =================================================== */
.apply-section {
  background: var(--color-surface);
  border-top: 1px solid oklch(from var(--color-border) l c h / 0.4);
}

.apply-inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
  text-align: center;
}

.apply-inner h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}
.apply-inner > p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 48ch;
  margin-inline: auto;
}

.apply-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 540px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15);
  outline: none;
}
.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  margin-top: var(--space-4);
}
.form-submit .btn-primary {
  width: 100%;
  justify-content: center;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

.form-note {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
}

/* ===================================================
   FOOTER
   =================================================== */
.site-footer {
  border-top: 1px solid oklch(from var(--color-border) l c h / 0.3);
  padding: var(--space-8) var(--space-6);
}
.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-left {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-right {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.footer-right a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-right a:hover {
  color: var(--color-text-muted);
}

/* ===================================================
   SCROLL ANIMATIONS (CSS-native)
   =================================================== */
.fade-in {
  opacity: 1;
}
@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}
@keyframes reveal-fade {
  to { opacity: 1; }
}

/* ===================================================
   TRUST BAR
   =================================================== */
.trust-bar {
  padding-block: var(--space-8);
  padding-inline: var(--space-6);
  border-bottom: 1px solid oklch(from var(--color-border) l c h / 0.2);
}
.trust-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  text-align: center;
}
.trust-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-text);
  line-height: 1.2;
}
.trust-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}