/* ===================================
   Trip Sketch Landing Page
   "여행의 설렘을 스케치하다"
   =================================== */

/* Custom Fonts */
@font-face {
  font-family: 'Nanum GyuRi';
  src: url('/assets/fonts/NanumGyuRiEuiIrGi.woff') format('woff'),
       url('/assets/fonts/NanumGyuRiEuiIrGi.otf') format('opentype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* ===================================
   CSS Variables (브랜딩 팔레트)
   =================================== */
:root {
  /* Primary - 코랄/테라코타 */
  --color-primary-50: #FEF3F0;
  --color-primary-100: #FDE7E1;
  --color-primary-200: #FACFC3;
  --color-primary-300: #F5A896;
  --color-primary-400: #EE8268;
  --color-primary-500: #E07A5F;
  --color-primary-600: #C4563D;
  --color-primary-700: #A33E28;

  /* Secondary - 모래/크림 */
  --color-sand-50: #FEFCF9;
  --color-sand-100: #FDF8F0;
  --color-sand-200: #F9EFDE;
  --color-sand-300: #F2CC8F;
  --color-sand-400: #E8B86D;
  --color-sand-500: #D4A574;

  /* Accent - 청록 바다색 */
  --color-sea-300: #A8D5C2;
  --color-sea-400: #81B29A;
  --color-sea-500: #6A9C89;

  /* Neutral - 따뜻한 그레이 */
  --color-warm-gray-50: #FAF9F7;
  --color-warm-gray-100: #F5F3F0;
  --color-warm-gray-200: #E8E4DF;
  --color-warm-gray-300: #D4CFC8;
  --color-warm-gray-400: #B5AEA4;
  --color-warm-gray-500: #918981;
  --color-warm-gray-600: #6E675F;
  --color-warm-gray-700: #524D47;
  --color-warm-gray-800: #3D3A36;
  --color-warm-gray-900: #2C2925;

  /* Fonts */
  --font-primary: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Nanum GyuRi', 'Caveat', cursive;
  --font-handwriting: 'Caveat', 'Nanum GyuRi', cursive;

  /* 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;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(60, 54, 47, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(60, 54, 47, 0.1), 0 2px 4px -1px rgba(60, 54, 47, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(60, 54, 47, 0.1), 0 4px 6px -2px rgba(60, 54, 47, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(60, 54, 47, 0.1), 0 10px 10px -5px rgba(60, 54, 47, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-warm-gray-800);
  background-color: var(--color-warm-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

/* ===================================
   Layout
   =================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-4);
  }
}

/* ===================================
   Header
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-warm-gray-200);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary-500);
}

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

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-warm-gray-600);
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-primary-500);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-warm-gray-600);
  background: var(--color-warm-gray-100);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.lang-toggle:hover {
  background: var(--color-warm-gray-200);
  color: var(--color-warm-gray-800);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  padding: var(--space-2);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--color-warm-gray-700);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Mobile Menu Overlay */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #FAF9F7;
  z-index: 99;
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-4);
  overflow-y: auto;
}

.mobile-menu.active {
  display: flex;
  height: calc(100vh - 64px);
}

.mobile-menu a {
  display: block;
  padding: var(--space-4);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-warm-gray-700);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-fast);
}

.mobile-menu a:hover,
.mobile-menu a:active {
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

.mobile-menu .btn {
  margin-top: var(--space-4);
  width: 100%;
  padding: var(--space-4);
  font-size: 1.125rem;
}

@media (max-width: 640px) {
  .nav-actions .btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: 0.8125rem;
  }
  
  .lang-toggle {
    padding: var(--space-2);
    font-size: 0.8125rem;
  }
}

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-primary);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1.0625rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(224, 122, 95, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 122, 95, 0.45);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary-300);
  color: var(--color-primary-600);
}

.btn-outline:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-400);
}

.btn-white {
  background: white;
  color: var(--color-primary-600);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

/* ===================================
   Hero Section
   =================================== */
.hero {
  padding: calc(64px + var(--space-16)) 0 var(--space-16);
  background: linear-gradient(180deg, var(--color-sand-50) 0%, var(--color-warm-gray-50) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-content {
  max-width: 540px;
}

.hero-title {
  margin-bottom: var(--space-6);
}

.hero-title-main {
  display: block;
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--color-warm-gray-900);
  line-height: 1.2;
}

.hero-title-sketch {
  display: block;
  font-family: var(--font-display);
  font-size: 3.5rem;
  color: var(--color-primary-500);
  line-height: 1.2;
  margin-top: var(--space-2);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-warm-gray-600);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

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

.hero-note {
  margin-top: var(--space-6);
  font-size: 0.875rem;
  color: var(--color-warm-gray-500);
}

.hero-visual {
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transform: rotate(2deg);
  transition: transform var(--transition-slow);
}

.hero-image-wrapper:hover {
  transform: rotate(0deg);
}

.hero-image {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-title-main {
    font-size: 2rem;
  }

  .hero-title-sketch {
    font-size: 2.5rem;
  }

  .hero-image-wrapper {
    transform: rotate(0deg);
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: calc(64px + var(--space-8)) 0 var(--space-10);
  }

  .hero-title-main {
    font-size: 1.625rem;
  }

  .hero-title-sketch {
    font-size: 2rem;
  }

  .hero-description {
    font-size: 1rem;
    margin-bottom: var(--space-6);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    padding: var(--space-4) var(--space-6);
    min-height: 48px;
  }

  .hero-note {
    font-size: 0.8125rem;
    line-height: 1.5;
  }
}

/* ===================================
   Section Headers
   =================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-warm-gray-900);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-warm-gray-500);
}

@media (max-width: 480px) {
  .section-header {
    margin-bottom: var(--space-8);
  }

  .section-title {
    font-size: 1.625rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }
}

/* ===================================
   Features Section
   =================================== */
.features {
  padding: var(--space-24) 0;
  background: white;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.feature-card {
  padding: var(--space-8);
  background: var(--color-warm-gray-50);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-warm-gray-900);
  margin-bottom: var(--space-3);
}

.feature-description {
  font-size: 0.9375rem;
  color: var(--color-warm-gray-600);
  line-height: 1.7;
}

@media (max-width: 968px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features {
    padding: var(--space-16) 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .feature-card {
    padding: var(--space-5);
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
  }

  .feature-icon {
    font-size: 2rem;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .feature-content {
    flex: 1;
  }

  .feature-title {
    font-size: 1.0625rem;
    margin-bottom: var(--space-2);
  }

  .feature-description {
    font-size: 0.875rem;
  }
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
  padding: var(--space-24) 0;
  background: var(--color-sand-50);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}

.step {
  flex: 1;
  text-align: center;
  max-width: 280px;
}

.step-number {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  box-shadow: 0 4px 14px rgba(224, 122, 95, 0.35);
}

.step-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-warm-gray-900);
  margin-bottom: var(--space-2);
}

.step-description {
  font-size: 0.9375rem;
  color: var(--color-warm-gray-600);
  line-height: 1.6;
}

.step-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-300), var(--color-primary-200));
  margin-top: 28px;
  flex-shrink: 0;
}

.how-it-works-cta {
  text-align: center;
  margin-top: var(--space-12);
}

@media (max-width: 768px) {
  .steps {
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
  }

  .step-connector {
    width: 2px;
    height: 30px;
    margin: 0;
  }

  .step {
    max-width: 100%;
  }

  .step-number {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .how-it-works {
    padding: var(--space-16) 0;
  }

  .how-it-works-cta .btn {
    width: 100%;
    padding: var(--space-4);
  }
}

/* ===================================
   Screenshots Section
   =================================== */
.screenshots {
  padding: var(--space-24) 0;
  background: white;
}

.screenshots-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.screenshot-item {
  text-align: center;
}

.screenshot-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.screenshot-caption {
  margin-top: var(--space-4);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-warm-gray-700);
}

@media (max-width: 768px) {
  .screenshots-gallery {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
    gap: var(--space-6);
  }
}

@media (max-width: 480px) {
  .screenshots {
    padding: var(--space-16) 0;
  }

  .screenshots-gallery {
    max-width: 100%;
  }

  .screenshot-caption {
    font-size: 0.875rem;
  }
}

/* ===================================
   CTA Section
   =================================== */
.cta {
  padding: var(--space-20) 0;
  background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
}

.cta-content {
  text-align: center;
}

.cta-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
}

.cta-description {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
}

@media (max-width: 480px) {
  .cta {
    padding: var(--space-12) 0;
  }

  .cta-title {
    font-size: 1.5rem;
  }

  .cta-description {
    font-size: 1rem;
    margin-bottom: var(--space-6);
  }

  .cta .btn {
    width: 100%;
    padding: var(--space-4);
  }
}

/* ===================================
   Footer
   =================================== */
.footer {
  padding: var(--space-12) 0 var(--space-6);
  background: var(--color-warm-gray-900);
  color: var(--color-warm-gray-300);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-warm-gray-700);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.footer-brand .logo-text {
  color: white;
}

.footer-tagline {
  width: 100%;
  font-size: 0.875rem;
  color: var(--color-warm-gray-400);
  margin-top: var(--space-1);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--color-warm-gray-300);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-6);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-warm-gray-500);
}

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    gap: var(--space-6);
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content,
.hero-visual {
  animation: fadeInUp 0.6s ease-out forwards;
}

.hero-visual {
  animation-delay: 0.2s;
}