/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --bg:            #FFE800;
  --surface:       rgba(0, 0, 0, 0.04);
  --text-primary:  #1A1A1A;
  --text-secondary:rgba(26, 26, 26, 0.7);
  --border:        rgba(0, 0, 0, 0.1);
  --border-hover:  rgba(0, 0, 0, 0.2);
  --bg-nav:        rgba(255, 232, 0, 0.85);

  --positive: #16A34A;
  --negative: #DC2626;

  --font-display: 'Inter', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'Inter', system-ui, sans-serif;

  --nav-h: 72px;
  --nav-h-compact: 52px;
  --section-gap: clamp(48px, 6vw, 88px);
  --container-max: 1120px;
  --container-narrow: 680px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="blue"] {
  --bg:            #3E60FF;
  --surface:       rgba(255, 255, 255, 0.08);
  --text-primary:  #FFFFFF;
  --text-secondary:rgba(255, 255, 255, 0.75);
  --border:        rgba(255, 255, 255, 0.2);
  --border-hover:  rgba(255, 255, 255, 0.3);
  --bg-nav:        rgba(62, 96, 255, 0.85);
}

[data-theme="yellow"] {
  --bg:            #FFE800;
  --surface:       rgba(0, 0, 0, 0.04);
  --text-primary:  #1A1A1A;
  --text-secondary:rgba(26, 26, 26, 0.7);
  --border:        rgba(0, 0, 0, 0.1);
  --border-hover:  rgba(0, 0, 0, 0.2);
  --bg-nav:        rgba(255, 232, 0, 0.85);
}

[data-theme="green"] {
  --bg:            #BAFC88;
  --surface:       rgba(0, 0, 0, 0.05);
  --text-primary:  #111111;
  --text-secondary:rgba(0, 0, 0, 0.65);
  --border:        rgba(0, 0, 0, 0.12);
  --border-hover:  rgba(0, 0, 0, 0.2);
  --bg-nav:        rgba(186, 252, 136, 0.85);
}

[data-theme="red"] {
  --bg:            #FF463D;
  --surface:       rgba(255, 255, 255, 0.1);
  --text-primary:  #FFFFFF;
  --text-secondary:rgba(255, 255, 255, 0.8);
  --border:        rgba(255, 255, 255, 0.25);
  --border-hover:  rgba(255, 255, 255, 0.35);
  --bg-nav:        rgba(255, 70, 61, 0.85);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  transition: background-color var(--transition), color var(--transition);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* ============================================================
   LAYOUT HELPERS
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 48px);
}

.container-narrow {
  max-width: var(--container-narrow);
}

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

.section-header {
  margin-bottom: clamp(28px, 4vw, 48px);
  text-align: center;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.section-subtitle {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 300;
}

/* ============================================================
   FADE-UP ANIMATION (IntersectionObserver driven)
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s var(--transition), transform 0.65s var(--transition);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger sibling delays */
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }

/* ============================================================
   NAV
   ============================================================ */
main {
  position: relative;
  z-index: 1;
}

#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: padding var(--transition), backdrop-filter var(--transition), background var(--transition), box-shadow var(--transition), border-color var(--transition), color var(--transition);
}

#nav nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 48px);
  padding-block: 24px;
  transition: padding-block var(--transition);
}

#nav.compact {
  backdrop-filter: blur(20px) saturate(160%);
  background: var(--bg-nav);
  box-shadow: 0 1px 0 var(--border);
}

#nav.compact nav {
  padding-block: 12px;
}

.nav-logo {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  transition: opacity var(--transition);
}

.nav-logo:hover {
  opacity: 0.75;
}

.nav-badge {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 4px;
  white-space: nowrap;
  display: inline-block;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.nav-badge:hover {
  background: var(--border);
  border-color: var(--border-hover);
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  padding: 4px 7px;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
}

.lang-btn:hover {
  color: var(--text-primary);
  background: var(--surface);
}

.lang-btn.active {
  color: var(--text-primary);
  font-weight: 500;
}

@media (max-width: 600px) {
  .lang-switcher { gap: 0; }
  .lang-btn { padding: 4px 5px; }
  .nav-badge { display: none; }
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--surface);
}
.theme-toggle:active {
  transform: scale(0.9);
}

.theme-swatch {
  position: relative;
  display: block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--bg);
  background-clip: padding-box;
  transition: background-color var(--transition);
}
.theme-swatch::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(0,0,0,0.15);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
  pointer-events: none;
}

/* smooth bg/color transitions on theme switch */
/* Individual component transitions are used instead of a global override */

/* ============================================================
   HERO
   ============================================================ */
.animated-hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--nav-h);
  padding-inline: clamp(20px, 5vw, 48px);
}

.hero-content-new {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.hero-pill-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.hero-pill-btn:hover {
  background: var(--border);
}

.hero-main-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 500;
  line-height: 1.1;
  text-align: center;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

.animated-text-container {
  display: grid;
  justify-items: center;
  align-items: center;
  overflow: hidden;
  padding: 0.25em 0;
  margin: -0.25em 0 1.5rem 0;
}

.animated-text {
  grid-area: 1 / 1;
  font-weight: 500;
  transition: opacity 1.2s ease;
}

.animated-text.entering {
  opacity: 0;
}
.animated-text.active {
  opacity: 1;
}
.animated-text.exiting {
  opacity: 0;
}

.hero-description {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2.5rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  padding: 0 1rem;
  text-wrap: balance;
}

.hero-description strong {
  font-weight: 500;
  color: var(--text-primary);
}

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

  #nav nav {
    padding-inline: 16px;
  }

  .nav-badge {
    font-size: 0.55rem;
    letter-spacing: 0.1em;
    padding: 4px 8px;
  }

  .nav-logo {
    font-size: 0.95rem;
  }
}

@media (max-width: 400px) {
  .nav-badge {
    display: none;
  }
}

.hero-bottom-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-solid-dark {
  background: var(--text-primary);
  color: var(--bg);
  border: 1px solid var(--text-primary);
  padding: 12px 44px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.btn-solid-dark:hover {
  opacity: 0.85;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), opacity var(--transition), transform var(--transition);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg);
  border-color: var(--text-primary);
}

.btn-primary:hover {
  background: #333333;
  border-color: #333333;
}

.btn-full {
  width: 100%;
}

/* ============================================================
   SCROLL HINT
   ============================================================ */
.scroll-hint {
  color: var(--text-secondary);
  margin-top: 12px;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(8px); }
}

/* ============================================================
   CONTACT FORM
   ============================================================ */

/* Honeypot — invisible to humans, bots will fill it */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  visibility: hidden;
  pointer-events: none;
}

.form-wrap {
  position: relative;
}

#contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-label {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.form-input {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
  width: 100%;
  resize: none;
}

.form-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.form-input:focus {
  border-color: rgba(0, 0, 0, 0.35);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

.form-textarea {
  min-height: 130px;
  resize: vertical;
}

.form-error {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--negative);
  text-align: center;
  padding: 10px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
}

/* Success state */
.form-success[hidden] {
  display: none !important;
}

.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 60px 40px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.success-icon {
  color: var(--positive);
}

.success-msg {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1.05rem;
  color: var(--text-primary);
}

/* Submit button loading state */
#form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding-block: 36px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.footer-domain {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.footer-copy {
  font-family: var(--font-body);
  font-weight: 200;
  font-size: 0.78rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

/* ============================================================
   RESPONSIVE — MOBILE FIRST ADJUSTMENTS
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --section-gap: 72px;
  }

  .hero-bottom-ctas {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .hero-bottom-ctas .btn-solid-dark {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }

  .form-success {
    padding: 40px 24px;
  }
}

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

  .fade-up {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ============================================================
   FOCUS VISIBLE — KEYBOARD NAV
   ============================================================ */
:focus-visible {
  outline: 2px solid rgba(0, 0, 0, 0.35);
  outline-offset: 3px;
  border-radius: 4px;
}