/* ============================================================
   Coder to Decoder — styles.css
   ============================================================ */

/* ── Custom Properties ─────────────────────────────────────── */
:root {
  --color-dark:    #282730;
  --color-dark-2:  #1e1d26;
  --color-accent:  #96D3FF;
  --color-accent-dark: #5bb8f5;
  --color-light:   #F7F8FC;
  --color-white:   #FFFFFF;
  --color-text:    #1A1A2E;
  --color-text-muted: #5a5a72;
  --color-border:  #e2e5ef;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1100px;
  --section-pad: 96px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;

  --nav-height: 68px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.2rem; }

p { color: var(--color-text-muted); line-height: 1.75; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 12px;
}

.section-label--light {
  color: var(--color-accent);
}

/* ── Layout Utilities ───────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-pad) 0;
}

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

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

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

.btn--primary:hover {
  background: #b8e2ff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(150, 211, 255, 0.35);
}

.btn--outline {
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
}

.btn--outline:hover {
  background: rgba(150, 211, 255, 0.1);
  transform: translateY(-1px);
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.nav--transparent {
  background: transparent;
}

.nav--solid {
  background: var(--color-dark);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav__logo img {
  height: 36px;
  width: auto;
}

.nav__logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

.nav__divider {
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.15);
  margin: 0 4px;
}

.nav__link--legal {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

.nav__link--legal:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

.nav__cta {
  padding: 9px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--color-accent);
  color: var(--color-dark);
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}

.nav__cta:hover {
  background: #b8e2ff;
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-dark-2);
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  z-index: 99;
}

.nav__mobile.open { display: flex; flex-direction: column; gap: 4px; }

.nav__mobile-link {
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav__mobile-link:hover { color: var(--color-white); background: rgba(255,255,255,0.07); }

.nav__mobile-cta {
  margin-top: 8px;
  text-align: center;
  padding: 13px;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--color-accent);
  color: var(--color-dark);
  border-radius: var(--radius-sm);
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  background: var(--color-dark);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}

/* Subtle grid pattern */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(150, 211, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(150, 211, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* Glow blob */
.hero::after {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(150, 211, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(150, 211, 255, 0.3);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 28px;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero__title {
  color: var(--color-white);
  margin-bottom: 20px;
}

.hero__title span {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 40px;
  max-width: 560px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.35);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  animation: float 2.5s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(150,211,255,0.5), transparent);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ── Services ────────────────────────────────────────────────── */
.services__header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.services__header h2 { margin-bottom: 16px; }

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent-dark);
  box-shadow: 0 8px 32px rgba(91, 184, 245, 0.12);
  transform: translateY(-3px);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(150, 211, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-accent-dark);
}

.service-card__title {
  margin-bottom: 12px;
  color: var(--color-text);
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.service-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.service-card__list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-dark);
  margin-top: 7px;
}

/* ── How It Works ────────────────────────────────────────────── */
.how__header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.how__header h2 { margin-bottom: 16px; }

.how__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

/* Connector line between steps */
.how__steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 1px;
  background: linear-gradient(to right, var(--color-border), var(--color-accent-dark), var(--color-border));
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 16px;
  position: relative;
}

.step__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.step__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.step__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ── About ───────────────────────────────────────────────────── */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__content h2 { margin-bottom: 20px; }
.about__content p { margin-bottom: 16px; }

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}

.stat {
  padding: 24px;
  background: var(--color-light);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.stat__value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  line-height: 1;
  margin-bottom: 6px;
}

.stat__label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.about__visual {
  position: relative;
}

.about__card {
  background: var(--color-dark);
  border-radius: var(--radius);
  padding: 40px;
  color: var(--color-white);
}

.about__card-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.about__card h3 {
  color: var(--color-white);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.about__card p {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}

.about__card-divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: 24px 0;
}

.about__card-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 5px 12px;
  background: rgba(150, 211, 255, 0.12);
  border: 1px solid rgba(150, 211, 255, 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--color-accent);
}

/* ── Contact ─────────────────────────────────────────────────── */
.contact.section--dark .section-label { color: var(--color-accent); }

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact__info h2 {
  color: var(--color-white);
  margin-bottom: 16px;
}

.contact__info p {
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 32px;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.contact__detail-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(150, 211, 255, 0.1);
  border: 1px solid rgba(150, 211, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact__detail a {
  color: var(--color-accent);
  transition: color var(--transition);
}
.contact__detail a:hover { color: #b8e2ff; }

/* Form */
.contact__form {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-white);
  transition: border-color var(--transition), background var(--transition);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.3);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  background: rgba(255,255,255,0.08);
  box-shadow: 0 0 0 3px rgba(150, 211, 255, 0.12);
}

.form-group select option { background: var(--color-dark-2); color: var(--color-white); }

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

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.contact__form .btn {
  width: 100%;
  justify-content: center;
}

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--color-dark-2);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 40px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer__logo img { height: 28px; }

.footer__logo-text {
  font-size: 0.95rem;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
}

.footer__copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__links a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}

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

/* ── Terms & Privacy ─────────────────────────────────────────── */
.legal {
  background: var(--color-light);
}

.legal__content {
  max-width: 760px;
  margin: 0 auto;
}

.legal__content h2 {
  margin-bottom: 32px;
}

.legal__content h3 {
  font-size: 1rem;
  color: var(--color-text);
  margin: 28px 0 8px;
}

.legal__content p,
.legal__content li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.legal__content ul {
  list-style: disc;
  padding-left: 20px;
  margin-top: 8px;
}

.legal__content ul li { margin-bottom: 6px; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --section-pad: 72px; }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .services__grid { grid-template-columns: 1fr; gap: 16px; }

  .how__steps { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .how__steps::before { display: none; }

  .about__inner { grid-template-columns: 1fr; gap: 48px; }

  .contact__inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 600px) {
  :root { --section-pad: 56px; }

  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.5rem; }

  .hero__actions { flex-direction: column; align-items: flex-start; }
  .hero__actions .btn { width: 100%; justify-content: center; }

  .how__steps { grid-template-columns: 1fr; }

  .about__stats { grid-template-columns: 1fr 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .footer__inner { flex-direction: column; align-items: flex-start; gap: 12px; }
}