/* ==============================
   CSS Variables
================================ */
:root {
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-text: #121212;
  --color-muted: #666666;
  --color-border: #dedede;
  --color-accent: #6b7280;
  --color-accent-strong: #111827;

  --font-main: Inter, Arial, Helvetica, sans-serif;

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;

  --radius-sm: 8px;
  --radius-md: 12px;

  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.04);

  --container-max: 1120px;
  --nav-height: 72px;
}

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

html,
body {
  min-height: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

button,
input,
textarea {
  font: inherit;
}

/* ==============================
   Utility / Layout
================================ */
.container {
  width: min(100% - 2rem, var(--container-max));
  margin-inline: auto;
}

.narrow {
  width: min(100% - 2rem, 760px);
  margin-inline: auto;
}

.section {
  padding: var(--space-7) 0;
}

.section-alt {
  background: #efefef;
}

.center {
  text-align: center;
}

.muted {
  color: var(--color-muted);
}

.h4 {
  font-size: 1.125rem;
}

/* ==============================
   Header / Nav
================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(245, 245, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-wrap {
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav a {
  color: var(--color-muted);
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-text);
  border-color: var(--color-accent-strong);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  width: 44px;
  height: 38px;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--color-text);
  display: block;
}

/* ==============================
   Typography / Buttons
================================ */
h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  margin-bottom: var(--space-3);
}

h2 {
  font-size: clamp(1.5rem, 2.2vw, 2.1rem);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-2);
}

p + p {
  margin-top: var(--space-3);
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: var(--space-2);
}

.lead {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: var(--color-muted);
  max-width: 680px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 0.72rem 1.2rem;
  font-weight: 600;
  transition: transform 0.2s ease, background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background: #000;
}

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

.btn-secondary:hover {
  border-color: var(--color-accent-strong);
  background: #ededed;
}

.text-link {
  color: var(--color-accent-strong);
  border-bottom: 1px solid var(--color-accent);
}

/* ==============================
   Cards / Grid
================================ */
.card-grid {
  display: grid;
  gap: var(--space-4);
}

.services-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.featured-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.works-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, border-color 0.25s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: #c7c7c7;
}

.service-card {
  padding: var(--space-4);
}

.work-card .card-body {
  padding: var(--space-4);
}

.work-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, #d5d5d5, #f0f0f0);
}

.meta {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin-bottom: var(--space-2);
}

/* ==============================
   Page Sections
================================ */
.hero {
  padding-top: calc(var(--space-7) + 1.5rem);
}

.hero-actions {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.center-action {
  margin-top: var(--space-5);
  text-align: center;
}

.cta {
  background: #ececec;
}

.page-intro {
  padding-top: calc(var(--space-7) + 1rem);
  padding-bottom: var(--space-5);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.filter-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted);
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-accent-strong);
  color: var(--color-text);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: var(--space-6);
}

.contact-info ul li + li {
  margin-top: var(--space-2);
}

.contact-info a {
  color: var(--color-accent-strong);
  border-bottom: 1px solid #b4b4b4;
}

.contact-form-wrap,
.contact-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.contact-form {
  display: grid;
  gap: var(--space-3);
}

.contact-form label {
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fafafa;
  padding: 0.72rem 0.8rem;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent-strong);
  background: #fff;
}

.form-message {
  min-height: 1.5em;
  color: var(--color-accent-strong);
  font-size: 0.95rem;
}

/* ==============================
   Footer
================================ */
.site-footer {
  margin-top: var(--space-7);
  border-top: 1px solid var(--color-border);
  background: #f0f0f0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-5);
  padding: var(--space-6) 0;
}

.footer-brand {
  margin-bottom: var(--space-2);
}

.footer-title {
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.footer-links li + li {
  margin-top: var(--space-1);
}

.footer-links a,
.site-footer a {
  color: var(--color-muted);
  transition: color 0.25s ease;
}

.footer-links a:hover,
.site-footer a:hover {
  color: var(--color-text);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* ==============================
   Animation
================================ */
.fade-in {
  animation: fadeIn 0.65s ease both;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

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

/* ==============================
   Responsive
================================ */
@media (max-width: 992px) {
  .services-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .featured-grid,
  .works-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(var(--nav-height) - 6px);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
    display: none;
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
    padding: 0.25rem 0;
  }

  .works-grid,
  .featured-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: var(--space-6) 0;
  }
}