/* =============================================
   U4IC Travel by Avery — Design Tokens & Styles
   Brand: Dark Teal + Gold
   ============================================= */

:root {
  /* Type Scale */
  --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;

  /* 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);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Zodiak', 'Georgia', serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
}

/* =============================================
   Light Mode (default) — U4IC Brand
   ============================================= */
:root, [data-theme="light"] {
  --color-bg:             #f5f7f7;
  --color-surface:        #ffffff;
  --color-surface-2:      #f0f4f4;
  --color-surface-offset: #e8eded;
  --color-border:         #c8d4d5;
  --color-divider:        #d8e0e1;

  --color-text:           #1a2e30;
  --color-text-muted:     #5a7072;
  --color-text-faint:     #94a7a9;
  --color-text-inverse:   #ffffff;

  /* Primary: Dark Teal (from logo) */
  --color-primary:        #0e5e6f;
  --color-primary-hover:  #094a58;
  --color-primary-active: #073842;

  /* Accent: Gold (from logo "by Avery" script) */
  --color-accent:         #c9942e;
  --color-accent-hover:   #b07f20;
  --color-accent-active:  #916914;

  /* Semantic */
  --color-success:        #2d7a3a;
  --color-error:          #c03030;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(14, 94, 111, 0.06);
  --shadow-md: 0 4px 12px rgba(14, 94, 111, 0.08);
  --shadow-lg: 0 12px 32px rgba(14, 94, 111, 0.12);
}

/* =============================================
   Dark Mode
   ============================================= */
[data-theme="dark"] {
  --color-bg:             #0f1a1c;
  --color-surface:        #152224;
  --color-surface-2:      #1a2c2e;
  --color-surface-offset: #1e3436;
  --color-border:         #2a4244;
  --color-divider:        #223838;

  --color-text:           #d4e4e5;
  --color-text-muted:     #8aa4a6;
  --color-text-faint:     #577072;
  --color-text-inverse:   #0f1a1c;

  --color-primary:        #3fa8b8;
  --color-primary-hover:  #2d8fa0;
  --color-primary-active: #1e7588;

  --color-accent:         #dbb04a;
  --color-accent-hover:   #c99e38;
  --color-accent-active:  #b08824;

  --color-success:        #5aaf62;
  --color-error:          #e05555;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0f1a1c;
    --color-surface:        #152224;
    --color-surface-2:      #1a2c2e;
    --color-surface-offset: #1e3436;
    --color-border:         #2a4244;
    --color-divider:        #223838;
    --color-text:           #d4e4e5;
    --color-text-muted:     #8aa4a6;
    --color-text-faint:     #577072;
    --color-text-inverse:   #0f1a1c;
    --color-primary:        #3fa8b8;
    --color-primary-hover:  #2d8fa0;
    --color-primary-active: #1e7588;
    --color-accent:         #dbb04a;
    --color-accent-hover:   #c99e38;
    --color-accent-active:  #b08824;
    --color-success:        #5aaf62;
    --color-error:          #e05555;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
  }
}

/* =============================================
   Layout
   ============================================= */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-bottom: var(--space-10);
}

/* =============================================
   Header
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--hidden { transform: translateY(-100%); }
.header--scrolled { box-shadow: var(--shadow-md); }

.header__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .header__inner { padding: var(--space-3) var(--space-8); }
}

.header__logo { display: flex; align-items: center; flex-shrink: 0; }
.header__logo-img {
  height: 48px;
  width: auto;
  border-radius: var(--radius-sm);
}

.header__nav { flex: 1; display: none; }
@media (min-width: 768px) {
  .header__nav { display: flex; justify-content: center; }
}

.header__nav-list {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.header__nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) 0;
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.header__nav-link:hover { color: var(--color-text); }
.header__nav-link:hover::after { width: 100%; }

.header__cta {
  display: none;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.header__cta:hover { background: var(--color-primary-hover); }
.header__cta:active { background: var(--color-primary-active); }

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

/* Hamburger */
.header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  margin-left: auto;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.header__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.header__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.header__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (min-width: 768px) {
  .header__hamburger { display: none; }
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  padding: var(--space-4) var(--space-4) var(--space-8);
  background: var(--color-bg);
  border-top: 1px solid var(--color-divider);
}

.mobile-menu.is-open { display: block; }

.mobile-menu ul { display: flex; flex-direction: column; gap: var(--space-1); }

.mobile-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}

.mobile-menu a:hover,
.mobile-menu a:active {
  background: var(--color-surface-2);
  color: var(--color-primary);
}

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

/* Dark mode toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }

/* =============================================
   Hero
   ============================================= */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 4rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 40, 50, 0.55) 0%,
    rgba(10, 40, 50, 0.4) 50%,
    rgba(10, 40, 50, 0.7) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-8) var(--space-4);
  max-width: 750px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-4);
  line-height: 1.1;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
  max-width: 55ch;
  margin-inline: auto;
  line-height: 1.6;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  color: #1a2e30;
  background: var(--color-accent);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  box-shadow: 0 4px 20px rgba(201, 148, 46, 0.35);
}

.hero__cta:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 6px 28px rgba(201, 148, 46, 0.45);
  transform: translateY(-1px);
}

.hero__cta:active {
  background: var(--color-accent-active);
  transform: translateY(0);
}

/* =============================================
   Categories
   ============================================= */
.categories {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.categories .section-title,
.categories .section-subtitle {
  text-align: center;
  margin-inline: auto;
}

.categories__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 600px) {
  .categories__grid { grid-template-columns: repeat(2, 1fr); }
}

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

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.category-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
}

.category-card:hover .category-card__icon {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.category-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.category-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.category-card__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.category-card__link:hover { color: var(--color-primary-hover); }

.category-card__link span {
  transition: transform 0.2s ease;
}

.category-card:hover .category-card__link span {
  transform: translateX(4px);
}

/* =============================================
   Quote Section
   ============================================= */
.quote {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
  background: var(--color-surface-2);
}

.quote__wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .quote__wrapper { grid-template-columns: 1fr 1.2fr; gap: var(--space-12); align-items: start; }
}

.quote__info-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.quote__perks {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.quote__perks li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.quote__perks svg {
  flex-shrink: 0;
  color: var(--color-primary);
  width: 20px;
  height: 20px;
}

/* Form */
.quote__form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}

@media (max-width: 600px) {
  .quote__form { padding: var(--space-6) var(--space-4); }
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (min-width: 480px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-row .form-group { margin-bottom: 0; }

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-faint);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235a7072' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-submit {
  width: 100%;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  margin-top: var(--space-4);
  letter-spacing: 0.01em;
}

.form-submit:hover { background: var(--color-primary-hover); }
.form-submit:active { background: var(--color-primary-active); transform: translateY(1px); }

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

/* Form validation */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: var(--color-error);
}

.form-group .error-msg {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
}

/* Success state */
.form-success {
  text-align: center;
  padding: var(--space-10) var(--space-6);
}

.form-success__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: oklch(from var(--color-success) l c h / 0.12);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-success);
}

.form-success h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.form-success p {
  color: var(--color-text-muted);
  max-width: 40ch;
  margin-inline: auto;
}

/* =============================================
   About
   ============================================= */
.about {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.about__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 768px) {
  .about__content { grid-template-columns: 1.2fr 1fr; gap: var(--space-12); }
}

.about__text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.about__contact-quick {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.about__contact-quick a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
}

.about__contact-quick a:hover { color: var(--color-primary-hover); }

.about__contact-quick svg {
  flex-shrink: 0;
}

.about__image {
  display: flex;
  justify-content: center;
}

.about__image img {
  max-width: 350px;
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* =============================================
   Footer
   ============================================= */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

@media (min-width: 600px) {
  .footer__grid { grid-template-columns: 1.5fr 1fr 1fr; }
}

.footer__logo {
  height: 60px;
  width: auto;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 30ch;
}

.footer__links h4,
.footer__contact h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__links ul,
.footer__contact ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__links a,
.footer__contact a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer__links a:hover,
.footer__contact a:hover { color: var(--color-primary); }

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-6);
  text-align: center;
}

@media (min-width: 600px) {
  .footer__bottom { flex-direction: row; justify-content: space-between; }
}

.footer__bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__attribution {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer__attribution:hover { color: var(--color-text-muted); }

/* =============================================
   Scroll Animations
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }

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