/* Travelogest — premium static portfolio styles */

:root {
  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --emerald-400: #34d399;
  --emerald-500: #10b981;
  --emerald-600: #059669;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;
  --white: #ffffff;
  --bg: var(--white);
  --bg-alt: var(--slate-50);
  --bg-card: var(--white);
  --text: var(--slate-900);
  --text-muted: var(--slate-600);
  --border: var(--slate-200);
  --header-bg: rgba(255, 255, 255, 0.85);
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --gradient: linear-gradient(135deg, var(--teal-500), var(--emerald-500));
  --gradient-text: linear-gradient(135deg, var(--teal-400), var(--emerald-400));
  --radius: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --container: 72rem;
  --header-h: 4.5rem;
  --transition: 0.25s ease;
  --platform-android: #3ddc84;
  --platform-ios: #555555;
  --platform-web: #007aff;
}

html.dark {
  --bg: var(--slate-950);
  --bg-alt: var(--slate-900);
  --bg-card: var(--slate-800);
  --text: var(--white);
  --text-muted: var(--slate-400);
  --border: rgba(51, 65, 85, 0.6);
  --header-bg: rgba(15, 23, 42, 0.9);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
  --platform-ios: #a1a1aa;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section {
  padding-block: 5rem;
}

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

.section-header {
  text-align: center;
  max-width: 40rem;
  margin-inline: auto;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-muted);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav__link {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--teal-500);
}

html.dark .nav__link:hover,
html.dark .nav__link:focus-visible {
  color: var(--teal-400);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  background: var(--bg-alt);
  color: var(--text);
  transition: background var(--transition), transform 0.15s ease;
}

.icon-btn:hover {
  background: var(--border);
}

.icon-btn:active {
  transform: scale(0.95);
}

.icon-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.icon-btn .icon-sun { display: none; }
html.dark .icon-btn .icon-moon { display: none; }
html.dark .icon-btn .icon-sun { display: block; color: #eab308; }

.menu-btn {
  display: flex;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding-block: 1rem 0.5rem;
  border-top: 1px solid var(--border);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav__link {
  padding: 0.75rem 0;
  font-weight: 500;
  color: var(--text-muted);
  text-align: left;
  transition: color var(--transition);
}

.mobile-nav__link:hover {
  color: var(--teal-500);
}

@media (min-width: 768px) {
  .nav { display: flex; }
  .menu-btn { display: none; }
  .mobile-nav { display: none !important; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.btn--primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(20, 184, 166, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(20, 184, 166, 0.45);
}

.btn--white {
  background: var(--white);
  color: var(--teal-600);
  font-size: 1.125rem;
  font-weight: 700;
  padding: 1.125rem 2.5rem;
  box-shadow: var(--shadow-lg);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100dvh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: var(--slate-900) center / cover no-repeat;
  z-index: 0;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(15, 23, 42, 0.88), rgba(30, 41, 59, 0.92));
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-block: 5rem;
  max-width: 56rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--slate-300);
  line-height: 1.7;
  max-width: 48rem;
  margin-inline: auto;
  margin-bottom: 2.5rem;
}

.hero__fade {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8rem;
  background: linear-gradient(to top, var(--bg), transparent);
  z-index: 2;
  pointer-events: none;
}

/* About */
.about-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.about-grid h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.about-grid p {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.about-grid .highlight {
  color: var(--teal-500);
  font-weight: 600;
}

html.dark .about-grid .highlight {
  color: var(--teal-400);
}

.about-image {
  position: relative;
}

.about-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.about-image__glow {
  position: absolute;
  bottom: -1rem;
  right: -1rem;
  width: 16rem;
  height: 16rem;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.2), transparent 70%);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

/* Services */
.services-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(4, 1fr); }
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card__icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.service-card__icon svg {
  width: 1.75rem;
  height: 1.75rem;
  color: var(--white);
}

.service-card__icon--blue { background: linear-gradient(135deg, #3b82f6, #06b6d4); }
.service-card__icon--purple { background: linear-gradient(135deg, #a855f7, #ec4899); }
.service-card__icon--green { background: linear-gradient(135deg, #22c55e, #10b981); }
.service-card__icon--orange { background: linear-gradient(135deg, #f97316, #ef4444); }

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--text-muted);
  line-height: 1.65;
  font-size: 0.9375rem;
}

/* Process */
.process-timeline {
  display: none;
}

.process-mobile {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.process-step {
  display: flex;
  gap: 1.25rem;
}

.process-step__icon {
  flex-shrink: 0;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(20, 184, 166, 0.35);
}

.process-step__icon svg {
  width: 1.75rem;
  height: 1.75rem;
  color: var(--white);
}

.process-step__number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--teal-500);
  line-height: 1;
  margin-bottom: 0.25rem;
}

html.dark .process-step__number {
  color: var(--teal-400);
}

.process-step h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.process-step p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

@media (min-width: 1024px) {
  .process-mobile { display: none; }

  .process-timeline {
    display: block;
    position: relative;
    padding-top: 2rem;
  }

  .process-timeline__line {
    position: absolute;
    top: 3.5rem;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    border-radius: 2px;
  }

  .process-timeline__grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    position: relative;
  }

  .process-timeline .process-step {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
  }

  .process-timeline .process-step__icon {
    position: relative;
    z-index: 1;
  }

  .process-timeline .process-step p {
    font-size: 0.8125rem;
  }
}

/* Why Us */
.why-grid {
  display: grid;
  gap: 2rem;
  max-width: 56rem;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .why-grid { grid-template-columns: repeat(2, 1fr); }
}

.why-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}

.why-card:hover {
  box-shadow: var(--shadow-lg);
}

.why-card__inner {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.why-card__icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius);
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
}

.why-card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--white);
}

.why-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.why-card p {
  color: var(--text-muted);
  line-height: 1.65;
}

/* Portfolio */
.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.5rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all 0.25s ease;
}

.filter-btn:hover {
  background: var(--bg-alt);
}

.filter-btn.is-active {
  background: var(--slate-900);
  color: var(--white);
  border-color: var(--slate-900);
}

html.dark .filter-btn.is-active {
  background: var(--white);
  color: var(--slate-900);
  border-color: var(--white);
}

.portfolio-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .portfolio-grid { grid-template-columns: repeat(3, 1fr); }
}

.portfolio-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.portfolio-card.is-hidden {
  display: none;
}

.portfolio-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.portfolio-card__icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius);
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.portfolio-card__icon--android { color: var(--platform-android); }
.portfolio-card__icon--ios { color: var(--platform-ios); }
.portfolio-card__icon--web { color: var(--platform-web); }

.badge {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge--android {
  background: var(--platform-android);
  color: var(--slate-900);
}

.badge--ios {
  background: var(--platform-ios);
  color: var(--white);
}

html.dark .badge--ios {
  color: var(--slate-900);
}

.badge--web {
  background: var(--platform-web);
  color: var(--white);
}

.portfolio-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.portfolio-card p {
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.portfolio-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color var(--transition);
}

.portfolio-card:hover .portfolio-card__link {
  color: var(--teal-500);
}

html.dark .portfolio-card:hover .portfolio-card__link {
  color: var(--teal-400);
}

.portfolio-card__link svg {
  width: 1rem;
  height: 1rem;
}

/* CTA */
.cta {
  position: relative;
  overflow: hidden;
  background: var(--gradient);
  padding-block: 5rem;
}

.cta__blob {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  filter: blur(60px);
  pointer-events: none;
}

.cta__blob--1 {
  top: 0;
  left: 0;
  width: 16rem;
  height: 16rem;
}

.cta__blob--2 {
  bottom: 0;
  right: 0;
  width: 24rem;
  height: 24rem;
}

.cta__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 48rem;
  margin-inline: auto;
}

.cta h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.cta p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.92);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

/* Footer */
.footer {
  background: var(--slate-900);
  color: var(--white);
  padding-block: 3rem;
}

html.dark .footer {
  background: var(--slate-950);
}

.footer__grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer__brand {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

.footer p,
.footer a {
  color: var(--slate-400);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.footer a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--transition);
}

.footer a:hover {
  color: var(--teal-400);
}

.footer h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer ul li + li {
  margin-top: 0.5rem;
}

.footer__contact a svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.footer__bottom {
  border-top: 1px solid var(--slate-800);
  padding-top: 2rem;
  text-align: center;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover,
  .service-card:hover,
  .portfolio-card:hover,
  .why-card:hover {
    transform: none;
  }
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--teal-500);
  outline-offset: 2px;
}