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

:root {
  --primary: #0b4f8a;
  --primary-dark: #083a66;
  --primary-light: #1a6bb5;
  --accent: #0d9488;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
  --max-width: 1140px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}

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

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 28px;
  font-weight: 600;
  font-size: 15px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.7);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

.btn-full {
  width: 100%;
}

.btn-nav {
  background: var(--primary);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 600;
}

.btn-nav:hover {
  background: var(--primary-dark);
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
}

.logo {
  display: flex;
  align-items: center;
  color: var(--text);
}

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

.logo-img {
  height: 70px;
  width: auto;
  max-width: 340px;
  object-fit: contain;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.2s;
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(145deg, #062f54 0%, var(--primary-dark) 35%, var(--primary) 70%, #1a7ab8 100%);
  color: #fff;
  padding: 85px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 20%, rgba(255,255,255,0.08) 0%, transparent 55%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 820px;
}

.hero-logo {
  height: 130px;
  width: auto;
  max-width: 400px;
  margin: 0 auto 26px;
  object-fit: contain;
  filter: drop-shadow(0 6px 20px rgba(0,0,0,0.25));
}

.hero h1 {
  font-size: clamp(1.85rem, 4vw, 2.55rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.15rem;
  opacity: 0.93;
  margin-bottom: 34px;
  line-height: 1.6;
}

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

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.15rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ===== Services ===== */
.services {
  padding: 90px 0;
  background: var(--bg);
}

.service-block {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 40px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
}

.service-block:last-child {
  margin-bottom: 0;
}

.service-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.service-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.service-header h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
}

.service-intro {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 0.98rem;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px 24px;
}

.service-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.95rem;
  color: var(--text);
}

.service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
}

.service-list .optional {
  color: var(--text-muted);
  font-size: 0.85em;
}

.painting-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.painting-grid h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 14px;
}

/* ===== Why Us ===== */
.why-us {
  padding: 90px 0;
  background: var(--bg-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== Mission ===== */
.mission {
  padding: 90px 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  text-align: center;
}

.mission-content {
  max-width: 720px;
  margin: 0 auto;
}

.mission h2 {
  font-size: clamp(1.75rem, 3vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 20px;
}

.mission-text {
  font-size: 1.2rem;
  line-height: 1.7;
  opacity: 0.95;
}

/* ===== Contact ===== */
.contact {
  padding: 90px 0;
  background: var(--bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
}

.contact-item {
  margin-bottom: 22px;
  font-size: 0.98rem;
  line-height: 1.55;
}

.contact-item strong {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-item a {
  color: var(--primary);
  font-weight: 500;
}

.contact-form-wrap {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  background: #fff;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11, 79, 138, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

.form-note {
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  color: #94a3b8;
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.footer-brand strong {
  display: block;
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.footer-brand p {
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-copy {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .painting-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 90px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px 28px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 65px 0 80px;
  }

  .hero-logo {
    height: 105px;
    max-width: 320px;
  }

  .services,
  .why-us,
  .mission,
  .contact {
    padding: 70px 0;
  }

  .service-block {
    padding: 28px 24px;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

  .contact-form-wrap {
    padding: 28px 22px;
  }

  .logo-img {
    height: 58px;
    max-width: 280px;
  }
}

@media (max-width: 480px) {
  .logo-img {
    height: 48px;
    max-width: 230px;
  }

  .hero-logo {
    height: 85px;
    max-width: 280px;
    margin-bottom: 18px;
  }

  .hero h1 {
    font-size: 1.65rem;
  }

  .hero-sub {
    font-size: 1.05rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    padding: 13px 22px;
  }
}