/* ==========================================
   w.AI Website — styles.css
   Mobile-first responsive stylesheet
   ========================================== */

/* --- Custom Properties --- */
:root {
  --color-primary: #0F4C5C;
  --color-primary-light: #1A6B7A;
  --color-secondary: #D4A843;
  --color-secondary-light: #E5C06A;
  --color-accent: #4ECDC4;
  --color-bg: #FAFAF7;
  --color-bg-dark: #0B1D25;
  --color-text: #1A1A1A;
  --color-text-light: #F5F5F0;
  --color-text-muted: #6B7280;

  --font-display: 'DM Serif Display', serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --section-padding: var(--space-xl) var(--space-md);
  --container-max: 1200px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 24px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 18px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-light);
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 1000;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-secondary);
  color: var(--color-text);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: var(--space-sm);
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Eyebrow Text --- */
.eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-secondary);
  margin-bottom: var(--space-xs);
}

.eyebrow--light {
  color: var(--color-secondary-light);
}

/* --- Section Headings --- */
.section-heading {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

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

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

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

.btn--primary:hover {
  background: var(--color-secondary-light);
  border-color: var(--color-secondary-light);
  color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212, 168, 67, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-light);
  border-color: var(--color-text-light);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  transform: translateY(-2px);
}

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

.btn--cta:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(15, 76, 92, 0.3);
}

.btn--full {
  width: 100%;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.nav--scrolled {
  background-color: #fff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav__container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
}

.nav__brand {
  display: flex;
  flex-direction: column;
}

.nav__brand-row {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.nav__formal-name {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(245, 245, 240, 0.75);
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}

.nav--scrolled .nav__formal-name {
  color: var(--color-text-muted);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  text-decoration: none;
  line-height: 1;
}

.nav__logo-w {
  color: var(--color-text-light);
  transition: color 0.3s ease;
}

.nav__logo-ai {
  color: var(--color-text-light);
  transition: color 0.3s ease;
}

.nav--scrolled .nav__logo-w {
  color: var(--color-text);
}

.nav--scrolled .nav__logo-ai {
  color: var(--color-text);
}

.nav__subsidiary {
  font-size: 0.6rem;
  color: rgba(245, 245, 240, 0.6);
  transition: color 0.3s ease;
  display: none;
}

.nav--scrolled .nav__subsidiary {
  color: var(--color-text-muted);
}

.nav__subsidiary a {
  color: inherit;
  text-decoration: underline;
}

/* Hamburger */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 110;
}

.nav__hamburger:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.nav__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav--scrolled .nav__hamburger-line {
  background: var(--color-text);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.nav__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--color-bg-dark);
  padding: 5rem var(--space-md) var(--space-md);
  transition: right 0.3s ease;
  z-index: 105;
}

.nav__menu--open {
  right: 0;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.nav__link {
  color: var(--color-text-light);
  font-weight: 500;
  font-size: 1.1rem;
  padding: var(--space-xs) 0;
  display: block;
  transition: color 0.2s ease;
}

.nav__link:hover {
  color: var(--color-secondary);
}

/* ==========================================
   HERO
   ========================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(11, 29, 37, 0.7) 0%,
    rgba(11, 29, 37, 0.5) 50%,
    rgba(11, 29, 37, 0.7) 100%
  );
}

.hero__pattern {
  position: absolute;
  inset: 0;
  animation: patternDrift 20s ease-in-out infinite alternate;
}

@keyframes patternDrift {
  0% { transform: translate(0, 0); }
  50% { transform: translate(-10px, 5px); }
  100% { transform: translate(5px, -10px); }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  max-width: 800px;
}

.hero__headline {
  font-size: 2.5rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

.hero__subtext {
  font-size: 1.15rem;
  color: rgba(245, 245, 240, 0.85);
  margin-bottom: var(--space-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

/* Hero fade-in animation */
.animate-hero {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease-out forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================
   ABOUT
   ========================================== */
.about {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.about__grid {
  display: grid;
  gap: var(--space-md);
}

.about__text p {
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.about__text a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about__image {
  border-radius: var(--radius-md);
  width: 100%;
}

/* ==========================================
   SERVICES
   ========================================== */
.services {
  padding: var(--section-padding);
  background: var(--color-bg-dark);
}

.services__grid {
  display: grid;
  gap: var(--space-md);
}

.services__card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  padding-left: calc(var(--space-md) + 4px);
  border-left: 4px solid var(--color-secondary);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.services__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.services__card--muted {
  opacity: 0.7;
}

.services__badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--color-secondary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
}

.services__card-title {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.services__card-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ==========================================
   AUDIENCE
   ========================================== */
.audience {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.audience__grid {
  display: grid;
  gap: var(--space-sm);
}

.audience__tile {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.audience__tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.audience__title {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.audience__text {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ==========================================
   COFFEE CHAT
   ========================================== */
.coffee-chat {
  padding: var(--section-padding);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.coffee-chat__subtext {
  color: rgba(245, 245, 240, 0.9);
  max-width: 640px;
  margin: 0 auto var(--space-md);
  text-align: center;
  font-size: 1.05rem;
}

.coffee-chat .eyebrow,
.coffee-chat .section-heading {
  text-align: center;
}

.coffee-chat__form-wrap {
  max-width: 640px;
  margin: 0 auto;
}

.coffee-chat__form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
  display: grid;
  gap: var(--space-sm);
}

.coffee-chat__note {
  text-align: center;
  color: rgba(245, 245, 240, 0.6);
  font-size: 0.8rem;
  margin-top: var(--space-sm);
}

.coffee-chat__success {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
  text-align: center;
}

.coffee-chat__success-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-sm);
}

.coffee-chat__success h3 {
  color: var(--color-primary);
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

.coffee-chat__success p {
  color: var(--color-text-muted);
}

/* --- Form Styles --- */
.form-group {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.form-required {
  color: #e53e3e;
}

.form-input {
  padding: 0.75rem 1rem;
  border: 1.5px solid #d1d5db;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

.form-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.2);
}

.form-input--error {
  border-color: #e53e3e;
}

.form-input--error:focus {
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.2);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7280' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

.form-error {
  font-size: 0.78rem;
  color: #e53e3e;
  min-height: 1.2rem;
  padding-top: 0.2rem;
}

.form-fieldset {
  border: none;
}

.form-radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: 0.3rem;
}

.form-radio-pill {
  cursor: pointer;
}

.form-radio-pill input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.form-radio-pill__label {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border: 1.5px solid #d1d5db;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  user-select: none;
}

.form-radio-pill input:checked + .form-radio-pill__label {
  background: var(--color-primary);
  color: var(--color-text-light);
  border-color: var(--color-primary);
}

.form-radio-pill input:focus-visible + .form-radio-pill__label {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.form-radio-pill__label:hover {
  border-color: var(--color-primary-light);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.form-checkbox input[type="checkbox"]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==========================================
   NEWSLETTER
   ========================================== */
.newsletter {
  padding: var(--section-padding);
  background: var(--color-bg);
  text-align: center;
}

.newsletter__subtext {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-md);
}

.newsletter__form-wrap {
  max-width: 600px;
  margin: 0 auto;
}

.newsletter__form {
  display: grid;
  gap: var(--space-sm);
  text-align: left;
}

.newsletter__success {
  padding: var(--space-md);
  text-align: center;
}

.newsletter__success h3 {
  color: var(--color-primary);
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

.newsletter__success p {
  color: var(--color-text-muted);
}

.newsletter__note {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-top: var(--space-sm);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
  background: var(--color-bg-dark);
  padding: var(--space-lg) var(--space-md) var(--space-md);
  color: var(--color-text-light);
}

.footer__grid {
  display: grid;
  gap: var(--space-md);
}

.footer__formal-name {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(245, 245, 240, 0.6);
  margin-top: var(--space-xs);
  letter-spacing: 0.02em;
}

.footer__tagline {
  font-family: var(--font-display);
  font-size: 1rem;
  color: rgba(245, 245, 240, 0.7);
  margin-top: 0.3rem;
}

.footer__subsidiary {
  font-size: 0.8rem;
  color: rgba(245, 245, 240, 0.5);
  margin-top: 0.3rem;
}

.footer__subsidiary a {
  color: inherit;
  text-decoration: underline;
}

.footer__heading {
  font-size: 0.9rem;
  font-family: var(--font-body);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  margin-bottom: var(--space-sm);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__list a {
  color: rgba(245, 245, 240, 0.7);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer__list a:hover {
  color: var(--color-text-light);
}

.footer__bottom {
  border-top: 1px solid rgba(245, 245, 240, 0.1);
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(245, 245, 240, 0.4);
}

/* ==========================================
   SCROLL ANIMATIONS
   ========================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger for service cards */
.services__card.animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.services__card.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.services__card.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.services__card.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }

/* Stagger for audience tiles */
.audience__tile.animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.audience__tile.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.audience__tile.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.audience__tile.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.audience__tile.animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }

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

  html {
    scroll-behavior: auto;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }

  .animate-hero {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .hero__pattern {
    animation: none;
  }
}

/* ==========================================
   TABLET (min-width: 768px)
   ========================================== */
@media (min-width: 768px) {
  .section-heading {
    font-size: 2.5rem;
  }

  .hero__headline {
    font-size: 3.2rem;
  }

  .hero__buttons {
    flex-direction: row;
    justify-content: center;
  }

  .about__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-lg);
  }

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

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

  .coffee-chat__form {
    grid-template-columns: 1fr 1fr;
    padding: var(--space-md) var(--space-lg);
  }

  .form-group--full {
    grid-column: 1 / -1;
  }

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

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

/* ==========================================
   DESKTOP (min-width: 1024px)
   ========================================== */
@media (min-width: 1024px) {
  .section-heading {
    font-size: 2.8rem;
  }

  /* Desktop nav */
  .nav__hamburger {
    display: none;
  }

  .nav__subsidiary {
    display: block;
  }

  .nav__menu {
    position: static;
    width: auto;
    height: auto;
    background: none;
    padding: 0;
  }

  .nav__list {
    flex-direction: row;
    gap: var(--space-md);
    align-items: center;
  }

  .nav__link {
    font-size: 0.9rem;
    padding: 0;
    position: relative;
  }

  .nav--scrolled .nav__link {
    color: var(--color-text);
  }

  .nav--scrolled .nav__link:hover {
    color: var(--color-primary);
  }

  .nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: width 0.3s ease;
  }

  .nav__link:hover::after {
    width: 100%;
  }

  /* Hero */
  .hero__headline {
    font-size: 3.8rem;
  }

  .hero__subtext {
    font-size: 1.25rem;
  }

  /* Audience grid: 5 items */
  .audience__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Wider coffee form */
  .coffee-chat__form {
    padding: var(--space-lg);
  }
}