/* ============================================
   Cardplot Technologies – Sales Page
   Modern, responsive, adaptive
   ============================================ */

:root {
  /* Colors – fintech trust + energy */
  --color-bg: #0a0e17;
  --color-bg-elevated: #111827;
  --color-bg-card: #1a2234;
  --color-surface: #1e293b;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-soft: #64748b;
  --color-accent: #10b981;
  --color-accent-hover: #34d399;
  --color-accent-muted: rgba(16, 185, 129, 0.15);
  --color-highlight: #fbbf24;
  --color-highlight-muted: rgba(251, 191, 36, 0.2);
  /* Typography */
  --font-display: 'Outfit', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  /* Spacing & layout */
  --container-max: 1120px;
  --section-padding-y: clamp(3rem, 8vw, 5rem);
  --section-padding-x: clamp(1.25rem, 4vw, 2rem);
  --header-height: 72px;
  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 12px;
  --radius-lg: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--section-padding-x);
  padding-right: var(--section-padding-x);
}

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-text);
  opacity: 0.95;
}

.logo-img {
  display: block;
  height: 36px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}

.nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav a {
  color: #fff;
  font-weight: 500;
}

.nav a:hover {
  color: #fff;
  opacity: 0.9;
}

.nav-cta {
  color: #fff !important;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.menu-toggle:hover {
  background: var(--color-surface);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.3s var(--ease-out);
}

.site-header[data-menu-open] .menu-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header[data-menu-open] .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header[data-menu-open] .menu-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem var(--section-padding-x) 1.5rem;
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
}

.site-header[data-menu-open] .mobile-nav {
  display: flex;
}

.mobile-nav a {
  padding: 0.75rem;
  color: #fff;
  font-weight: 500;
  border-radius: var(--radius);
}

.mobile-nav a:hover {
  color: #fff;
  opacity: 0.9;
  background: var(--color-surface);
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-nav {
    display: none !important;
  }
}

/* ========== HERO ========== */
.hero {
  position: relative;
  padding-top: clamp(2.5rem, 6vw, 4rem);
  padding-bottom: var(--section-padding-y);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-accent-muted), transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(16, 185, 129, 0.06), transparent 45%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: var(--color-accent-muted);
  border-radius: 100px;
}

.hero-headline {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  color: var(--color-text);
}

.hero-headline-icon {
  display: inline-block;
}

.highlight {
  color: var(--color-highlight);
  position: relative;
}

.hero-subheadline {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  line-height: 1.5;
}

.hero-supporting {
  font-size: 1rem;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}

.hero-supporting-secondary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0 0 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.75rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), background 0.25s var(--ease-out), color 0.2s;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn-primary {
  color: var(--color-bg);
  background: var(--color-accent);
  box-shadow: 0 2px 12px rgba(16, 185, 129, 0.25);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-bg);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 32px rgba(16, 185, 129, 0.4);
}

.btn-primary:active {
  transform: translateY(-1px) scale(1);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-hero {
  padding: 1.1rem 2.25rem;
  font-size: 1.1rem;
  font-weight: 700;
  min-width: 260px;
  letter-spacing: 0.02em;
}

.btn-hero .btn-icon {
  transition: transform 0.25s var(--ease-out);
}

.btn-hero:hover .btn-icon {
  transform: translateX(3px);
}

.btn-icon {
  font-size: 1.1em;
}

/* ========== SECTIONS COMMON ========== */
.section {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
}

.section-headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2rem);
  text-align: center;
  margin: 0 0 2.5rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.section-icon {
  font-size: 1.2em;
}

/* ========== HOW IT WORKS ========== */
.how-it-works {
  background: var(--color-bg-elevated);
}

.steps {
  display: grid;
  gap: 1.5rem;
  max-width: 820px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.5rem;
  align-items: start;
  padding: 1.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.step:hover {
  border-color: rgba(16, 185, 129, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.step-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent);
  background: var(--color-accent-muted);
  border-radius: 10px;
  grid-row: span 2;
}

.step-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0;
  color: var(--color-text);
}

.step-desc {
  margin: 0.25rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  grid-column: 2;
}

@media (min-width: 640px) {
  .steps {
    gap: 1.25rem;
  }

  .step {
    padding: 1.75rem 2rem;
  }
}

/* ========== VALUE PROPOSITION ========== */
.value-prop {
  background: var(--color-bg);
}

.value-headline {
  font-size: clamp(1.4rem, 3.5vw, 1.85rem);
}

.value-intro {
  text-align: center;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin: 0 auto 1rem;
  max-width: 560px;
}

.value-video-wrap {
  margin: 2rem auto 2rem;
  max-width: 720px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.value-video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  vertical-align: middle;
}

.value-subintro {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  margin: 0 0 1.5rem;
  letter-spacing: -0.01em;
}

.value-list {
  list-style: none;
  padding: 0;
  margin: 0 auto 2rem;
  max-width: 540px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.value-list li {
  position: relative;
  padding: 1rem 1.25rem 1rem 2.75rem;
  color: var(--color-text);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.45;
  border-bottom: 1px solid var(--color-border);
}

.value-list li:last-child {
  border-bottom: none;
}

.value-list li::before {
  content: '✓';
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
  color: var(--color-bg);
  background: var(--color-accent);
  border-radius: 50%;
}

.value-tagline {
  text-align: center;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 auto;
  max-width: 520px;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

/* ========== FINAL CTA ========== */
.cta-final {
  background: linear-gradient(180deg, var(--color-bg-elevated) 0%, var(--color-bg) 100%);
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 2rem;
  color: var(--color-text);
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: stretch;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-muted);
  transform: translateY(-2px);
}

.btn-icon-svg {
  flex-shrink: 0;
  display: block;
}

.btn-telegram:hover {
  border-color: #0088cc;
  background: rgba(0, 136, 204, 0.12);
}

.btn-whatsapp:hover {
  border-color: #25d366;
  background: rgba(37, 211, 102, 0.12);
}

@media (min-width: 480px) {
  .cta-buttons {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
  }

  .btn-secondary {
    min-width: 200px;
  }
}

/* ========== FOOTER ========== */
.site-footer {
  padding: 2rem var(--section-padding-x);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-logo {
  display: block;
  height: 32px;
  width: auto;
  max-width: 140px;
  margin: 0 auto 0.75rem;
  object-fit: contain;
  opacity: 0.9;
}

.footer-tagline {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  margin: 0.25rem auto 0;
  max-width: 520px;
  line-height: 1.5;
}

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

  html {
    scroll-behavior: auto;
  }
}