/* ==========================================================================
   WebStudio — Main Stylesheet
   ========================================================================== */

/* Reset & Base (extends critical CSS) */
:root {
  --space-3xl: 96px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.12);
  --shadow-xl: 0 24px 48px rgba(0,0,0,.16);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,.4);
    --shadow-xl: 0 24px 48px rgba(0,0,0,.5);
  }
}

:root[data-theme="dark"] {
  --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.4);
  --shadow-xl: 0 24px 48px rgba(0,0,0,.5);
}

/* ==========================================================================
   Typography Scale
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-sm);
  line-height: 1.2;
  font-weight: 700;
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 5vw + 1rem, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3vw + 1rem, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.25rem, 2vw + 0.75rem, 1.5rem); }
h4 { font-size: clamp(1.125rem, 1vw + 1rem, 1.25rem); }

p { margin: 0 0 var(--space-md); max-width: 75ch; }

.section__header { text-align: center; margin-bottom: var(--space-2xl); }
.section__title { margin-bottom: var(--space-sm); }
.section__description { color: var(--muted); font-size: 1.125rem; margin: 0 auto; max-width: 60ch; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible { outline-offset: 2px; }

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn--secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}

.btn--secondary:hover { border-color: var(--accent); color: var(--accent); }

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

.btn--outline:hover { background: var(--accent); color: #fff; }

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

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(var(--bg-rgb, 250,250,250), 0.9);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .header { background: rgba(var(--bg-rgb, 15,15,26), 0.9); }
}

:root[data-theme="dark"] .header { background: rgba(var(--bg-rgb, 15,15,26), 0.9); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--space-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--fg);
  text-decoration: none;
  flex-shrink: 0;
}

.logo__mark { color: var(--accent); flex-shrink: 0; }
.logo:hover { text-decoration: none; }

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-weight: 500;
  color: var(--fg);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav__link:hover { color: var(--accent); background: var(--card); text-decoration: none; }

.nav__link--cta { background: var(--accent); color: #fff; border-color: var(--accent); }
.nav__link--cta:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.nav-toggle { display: none; background: none; border: none; padding: var(--space-sm); cursor: pointer; }
.nav-toggle__bar { display: block; width: 24px; height: 2px; background: var(--fg); margin: 5px 0; border-radius: 1px; transition: transform var(--transition-normal), opacity var(--transition-normal); }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav { position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: var(--space-md); transform: translateY(-100%); opacity: 0; visibility: hidden; transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal); }
  .nav--open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; width: 100%; }
  .nav__link { width: 100%; text-align: center; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: var(--space-3xl) 0; }
.hero__inner { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: center; }

.hero__eyebrow {
  display: inline-block;
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.hero__title { margin-bottom: var(--space-md); }
.hero__description { font-size: 1.125rem; color: var(--muted); margin-bottom: var(--space-xl); max-width: 55ch; }

.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-bottom: var(--space-2xl); }

.hero__stats { display: flex; flex-wrap: wrap; gap: var(--space-xl); margin: 0; padding: 0; list-style: none; }
.stat__value { display: block; font-size: 1.75rem; font-weight: 700; color: var(--fg); line-height: 1.2; }
.stat__label { display: block; font-size: 0.875rem; color: var(--muted); margin-top: var(--space-xs); }

.hero__visual { position: relative; }
.hero__visual img { border-radius: var(--radius); box-shadow: var(--shadow-xl); width: 100%; height: auto; aspect-ratio: 4/3; object-fit: cover; }

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; text-align: center; }
  .hero__description { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__stats { justify-content: center; }
  .hero__visual { order: -1; max-width: 500px; margin: 0 auto; }
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section { padding: var(--space-3xl) 0; }
.section--alt { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ==========================================================================
   Services
   ========================================================================== */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

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

.service-card__icon { display: inline-flex; width: 48px; height: 48px; align-items: center; justify-content: center; background: var(--accent); color: #fff; border-radius: var(--radius-sm); margin-bottom: var(--space-md); flex-shrink: 0; }

.service-card__title { margin-bottom: var(--space-sm); font-size: 1.25rem; }
.service-card__description { color: var(--muted); font-size: 0.9375rem; margin-bottom: var(--space-md); flex: 1; }

.service-card__features { margin: 0 0 var(--space-lg); padding: 0; list-style: none; font-size: 0.875rem; color: var(--muted); }
.service-card__features li { position: relative; padding-left: var(--space-lg); margin-bottom: var(--space-xs); }
.service-card__features li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 600; }

.service-card__price { display: inline-block; font-size: 1.125rem; font-weight: 700; color: var(--accent); }

@media (max-width: 1024px) { .services__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .services__grid { grid-template-columns: 1fr; } }

/* ==========================================================================
   Process
   ========================================================================== */
.process__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.process-step { position: relative; padding-left: var(--space-xl); }

.process-step__number {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: var(--border);
  font-family: var(--font-mono);
}

.process-step__content { min-height: 80px; }
.process-step__title { font-size: 1.125rem; margin-bottom: var(--space-xs); }
.process-step__description { color: var(--muted); font-size: 0.9375rem; margin: 0; }

@media (max-width: 1024px) { .process__steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) {
  .process__steps { grid-template-columns: 1fr; }
  .process-step__number { position: static; display: block; margin-bottom: var(--space-sm); font-size: 2rem; }
  .process-step { padding-left: 0; }
}

/* ==========================================================================
   Portfolio
   ========================================================================== */
.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.case-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform var(--transition-normal), box-shadow var(--transition-normal); }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.case-card__image { margin: 0; overflow: hidden; }
.case-card__image img { width: 100%; height: 270px; object-fit: cover; transition: transform var(--transition-normal); }
.case-card:hover .case-card__image img { transform: scale(1.03); }

.case-card__content { padding: var(--space-lg); }
.case-card__tag { display: inline-block; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); background: rgba(var(--accent-rgb, 37,99,235), 0.1); padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-sm); margin-bottom: var(--space-sm); }
.case-card__title { font-size: 1.125rem; margin-bottom: var(--space-sm); }
.case-card__description { color: var(--muted); font-size: 0.9375rem; margin-bottom: var(--space-md); }
.case-card__metrics { display: flex; flex-wrap: wrap; gap: var(--space-md); margin: 0 0 var(--space-md); padding: 0; list-style: none; font-size: 0.875rem; color: var(--muted); }
.case-card__metrics strong { color: var(--fg); }
.case-card__link { display: inline-flex; align-items: center; gap: var(--space-xs); font-weight: 600; font-size: 0.9375rem; color: var(--accent); transition: gap var(--transition-fast); }
.case-card__link:hover { gap: var(--space-sm); text-decoration: none; }

.portfolio__cta { text-align: center; margin-top: var(--space-xl); }

@media (max-width: 1024px) { .portfolio__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .portfolio__grid { grid-template-columns: 1fr; } }

/* ==========================================================================
   About
   ========================================================================== */
.about__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: start; }
.about__subtitle { font-size: 1.5rem; font-weight: 600; margin-bottom: var(--space-md); color: var(--fg); }
.about__content p { color: var(--muted); margin-bottom: var(--space-md); }
.about__content p:last-child { margin-bottom: var(--space-lg); }

.about__values { margin: 0; padding: 0; list-style: none; }
.about__values li { position: relative; padding-left: var(--space-lg); margin-bottom: var(--space-md); color: var(--muted); }
.about__values li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-weight: 600; }
.about__values strong { color: var(--fg); }

.about__team-title { margin-bottom: var(--space-lg); }
.team__list { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); margin: 0; padding: 0; list-style: none; }
.team-member { display: flex; align-items: center; gap: var(--space-md); padding: var(--space-md); background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); transition: border-color var(--transition-fast); }
.team-member:hover { border-color: var(--accent); }
.team-member__avatar { flex-shrink: 0; color: var(--accent); }
.team-member__name { display: block; font-weight: 600; color: var(--fg); }
.team-member__role { display: block; font-size: 0.875rem; color: var(--muted); }

@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; }
  .team__list { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: start; }

.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
.form__group { margin-bottom: var(--space-lg); }
.form__label { display: block; font-weight: 500; margin-bottom: var(--space-xs); color: var(--fg); }
.form__input, .form__select, .form__textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form__input:focus, .form__select:focus, .form__textarea:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px rgba(var(--focus-rgb, 37,99,235), 0.2); }
.form__input::placeholder, .form__textarea::placeholder { color: var(--muted); opacity: 0.6; }
.form__textarea { resize: vertical; min-height: 120px; }
.form__select { cursor: pointer; }

.form__consent { display: flex; align-items: flex-start; gap: var(--space-sm); }
.form__checkbox { flex-shrink: 0; width: 18px; height: 18px; margin-top: 2px; accent-color: var(--accent); cursor: pointer; }
.form__checkbox-label { font-size: 0.875rem; color: var(--muted); line-height: 1.5; }
.form__checkbox-label a { color: var(--accent); }
.form__note { margin-top: var(--space-md); font-size: 0.875rem; min-height: 1.5em; }

.contact__info-title { margin-bottom: var(--space-lg); font-size: 1.25rem; }
.contact__list { margin: 0; padding: 0; list-style: none; }
.contact__item { display: flex; gap: var(--space-md); margin-bottom: var(--space-xl); }
.contact__icon { flex-shrink: 0; color: var(--accent); width: 20px; height: 20px; }
.contact__label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 0 0 var(--space-xs); }
.contact__value { font-size: 1rem; color: var(--fg); text-decoration: none; transition: color var(--transition-fast); display: block; margin-bottom: var(--space-xs); }
.contact__value:hover { color: var(--accent); text-decoration: none; }
.contact__hint { font-size: 0.875rem; color: var(--muted); margin: 0; }

@media (max-width: 900px) {
  .contact__grid { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { background: var(--card); border-top: 1px solid var(--border); padding: var(--space-3xl) 0 var(--space-xl); }
.footer__inner { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: var(--space-2xl); margin-bottom: var(--space-2xl); }
.footer__brand { max-width: 280px; }
.footer__tagline { color: var(--muted); font-size: 0.9375rem; margin-top: var(--space-md); }

.footer__nav-col h4 { font-size: 0.875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 0 0 var(--space-md); }
.footer__nav-col ul { margin: 0; padding: 0; list-style: none; }
.footer__nav-col li { margin-bottom: var(--space-sm); }
.footer__nav-col a { font-size: 0.9375rem; color: var(--fg); transition: color var(--transition-fast); }
.footer__nav-col a:hover { color: var(--accent); text-decoration: none; }

.footer__social .social__list { display: flex; gap: var(--space-md); margin: 0; padding: 0; list-style: none; }
.social__link { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); color: var(--muted); transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast); }
.social__link:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-2px); text-decoration: none; }

.footer__bottom { padding-top: var(--space-xl); border-top: 1px solid var(--border); }
.footer__bottom-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-md); }
.footer__copyright { margin: 0; font-size: 0.875rem; color: var(--muted); }
.footer__made { margin: 0; font-size: 0.875rem; color: var(--muted); }

@media (max-width: 1024px) { .footer__inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) {
  .footer__inner { grid-template-columns: 1fr; text-align: center; }
  .footer__brand { max-width: none; margin: 0 auto; }
  .footer__social .social__list { justify-content: center; }
  .footer__bottom-inner { flex-direction: column; text-align: center; }
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }

/* ==========================================================================
   Animations (respect prefers-reduced-motion)
   ========================================================================== */
@media (prefers-reduced-motion: no-preference) {
  .fade-in-up { animation: fadeInUp 0.6s ease-out both; }
  @keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
  .stagger-1 { animation-delay: 100ms; }
  .stagger-2 { animation-delay: 200ms; }
  .stagger-3 { animation-delay: 300ms; }
  .stagger-4 { animation-delay: 400ms; }
  .stagger-5 { animation-delay: 500ms; }
  .stagger-6 { animation-delay: 600ms; }
}