/* ================================
   Global Variables & Theme
=================================== */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f3f4f6;
  --color-surface: #ffffff;
  --color-text: #111827;
  --color-muted: #4b5563;
  --color-accent: #5b21b6;    /* dark purple */
  --color-accent-soft: #ede9fe;
  --color-border: #e5e7eb;

  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-md: 0.75rem;
  --radius-lg: 1rem;

  --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--color-muted);
  margin: 0;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

/* Logo block */
.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-img-vertical {
  height: 64px;
  width: auto;
  display: block;
}

.logo-text-block {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  line-height: 1.1;
}

.logo-line {
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  font-family: "Bahnschrift", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-transform: uppercase;
}

/* Navigation */
.site-nav {
  position: relative;
}

.nav-toggle {
  border: none;
  background: none;
  color: var(--color-text);
  font-size: 1.6rem;
  cursor: pointer;
  display: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.nav-links a.active {
  color: var(--color-accent);
  font-weight: 600;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 4.5rem 0 4rem;
  background: url("images/hero-placeholder.jpg") center/cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
      to right,
      rgba(255, 255, 255, 0.8),
      rgba(255, 255, 255, 0.7),
      rgba(255, 255, 255, 0.55)
    );
}




.hero-inner {
  position: relative;
}

.hero-inner h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  max-width: 620px;
  margin-bottom: 1rem;
}

.hero-inner p {
  max-width: 540px;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease,
    border-color 0.12s ease, color 0.12s ease;
}

.btn.primary {
  background: var(--color-accent);
  color: #ffffff;
  box-shadow: 0 14px 30px rgba(91, 33, 182, 0.35);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(91, 33, 182, 0.45);
}

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

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

/* Grid Layouts */
.grid {
  display: grid;
  gap: 1.75rem;
}

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

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

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.card h3,
.card h2 {
  margin-top: 0;
}

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

.project-card img {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  display: block;
}

/* Lists */
.list {
  padding-left: 1.1rem;
  margin: 0.5rem 0 0;
}

.list li {
  margin-bottom: 0.35rem;
  color: var(--color-muted);
}

/* Page Hero (for subpages) */
.page-main {
  padding-bottom: 4rem;
}

.page-hero {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(90deg, #f9fafb, #f3e8ff);
}

.page-hero h1 {
  font-size: clamp(1.9rem, 3.5vw, 2.4rem);
  margin-bottom: 0.5rem;
}

.page-hero p {
  color: var(--color-muted);
  margin: 0;
}

/* Service Blocks */
.service-block {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.5rem;
}

/* CTA Section */
.cta {
  background: linear-gradient(120deg, #f5f3ff, #eef2ff);
  border-top: 1px solid #ddd6fe;
  border-bottom: 1px solid #e0e7ff;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Contact Form */
.contact-form {
  display: grid;
  gap: 0.75rem;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.contact-form label {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background: #f9fafb;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px rgba(91, 33, 182, 0.4);
  background: #ffffff;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: #f9fafb;
  padding: 1.75rem 0 1.5rem;
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.footer-links a {
  color: var(--color-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-accent);
}

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


/* Per-page hero banner backgrounds */
.page-hero-about,
.page-hero-services,
.page-hero-case-studies,
.page-hero-applications,
.page-hero-contact {
  position: relative;
  color: var(--color-text);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.page-hero-about { background-image: url("images/hero-placeholder-2.jpg"); }
.page-hero-services { background-image: url("images/hero-placeholder-3.jpg"); }
.page-hero-case-studies { background-image: url("images/hero-placeholder-8.jpg"); }
.page-hero-applications { background-image: url("images/hero-placeholder-4.jpg"); }
.page-hero-contact { background-image: url("images/hero-placeholder-5.jpg"); }

.page-hero-about::before,
.page-hero-services::before,
.page-hero-case-studies::before,
.page-hero-applications::before,
.page-hero-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0.7),
    rgba(255, 255, 255, 0.5)
  );
}

.page-hero-about .container,
.page-hero-services .container,
.page-hero-case-studies .container,
.page-hero-applications .container,
.page-hero-contact .container {
  position: relative;
}


/* Responsive */
@media (max-width: 900px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .header-inner {
    min-height: 64px;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 110%;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 0.6rem 0;
    min-width: 200px;
    display: none;
  }

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

  .nav-links li {
    padding: 0.25rem 1rem;
  }

  .hero {
    padding-top: 5rem;
    padding-bottom: 3rem;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .logo-img-vertical {
    height: 56px;
  }

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