/* ==========================================================================
   HMB Digital - Styles
   Mobile-first, single stylesheet
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  --color-primary: #0000FF;
  --color-primary-hover: #0000CC;
  --color-navy: #003D82;
  --color-light-blue: #E3F2FD;
  --color-text: #333333;
  --color-text-secondary: #707070;
  --color-border: #E0E0E0;
  --color-white: #FFFFFF;
  --color-bg: #FAFAFA;
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --container-max: 1200px;
  --header-height: 64px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

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

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

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

ul {
  list-style: none;
}

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 4rem 0;
}

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

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white) !important;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-white);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

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

.btn-white:hover {
  background: var(--color-light-blue);
  color: var(--color-primary);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-disabled {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--color-border);
  color: var(--color-text-secondary);
  cursor: default;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo img {
  height: 48px;
  width: auto;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

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

/* Hamburger */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

/* Hamburger open state */
.nav-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile nav */
.main-nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.main-nav.is-open {
  display: block;
}

.nav-list {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.25rem;
  gap: 0.5rem;
}

.nav-list a {
  display: block;
  padding: 0.5rem 0;
  color: var(--color-text);
  font-weight: 500;
}

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

.nav-list .btn {
  text-align: center;
  margin-top: 0.5rem;
}

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--header-height) + 3rem) 0 3rem;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-tagline {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

/* ---------- Card Grid ---------- */
.card-grid {
  display: grid;
  gap: 1.5rem;
}

/* Portfolio Cards */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg);
}

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

.card-body {
  padding: 1.25rem;
}

.card-body h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card-body p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--color-light-blue);
  color: var(--color-navy);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 4px;
}

/* Service Cards */
.service-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.service-icon {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* ---------- USP Grid (About) ---------- */
.usp-grid {
  display: grid;
  gap: 2rem;
  text-align: center;
}

.usp-icon {
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.usp-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.usp-item p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  max-width: 320px;
  margin: 0 auto;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 4rem 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.cta-banner p {
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 1.5rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-inner p {
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--color-white);
  opacity: 0.7;
  transition: opacity var(--transition);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-white);
}

/* ---------- Contact Page ---------- */
.contact-section {
  padding-top: calc(var(--header-height) + 3rem);
}

.contact-grid {
  display: grid;
  gap: 2.5rem;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-weight: 500;
  font-size: 0.9375rem;
}

.required {
  color: #D32F2F;
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-family);
  font-size: 1rem;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 0, 255, 0.1);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #D32F2F;
}

.error-msg {
  font-size: 0.8125rem;
  color: #D32F2F;
  min-height: 1.2em;
}

.form-status {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
  display: none;
}

.form-status.success {
  display: block;
  background: #E8F5E9;
  color: #2E7D32;
}

.form-status.error {
  display: block;
  background: #FFEBEE;
  color: #C62828;
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-info-item svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 0.25rem;
}

.contact-info-item h3 {
  font-size: 0.9375rem;
  margin-bottom: 0.125rem;
}

.contact-info-item p,
.contact-info-item a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* ---------- Scroll Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive: Tablet (600px) ---------- */
@media (min-width: 600px) {
  .hero h1 {
    font-size: 2.5rem;
  }

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

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

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

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

/* ---------- Responsive: Desktop (900px) ---------- */
@media (min-width: 900px) {
  .section {
    padding: 5rem 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero {
    padding: calc(var(--header-height) + 5rem) 0 5rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  /* Desktop nav */
  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: block;
    position: static;
    border-bottom: none;
    box-shadow: none;
    background: transparent;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    padding: 0;
    gap: 1.5rem;
  }

  .nav-list .btn {
    margin-top: 0;
  }

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

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

  .contact-grid {
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ---------- Responsive: Wide (1200px) ---------- */
@media (min-width: 1200px) {
  .container {
    padding: 0 2rem;
  }

  .section {
    padding: 6rem 0;
  }

  .hero {
    padding: calc(var(--header-height) + 6rem) 0 6rem;
  }

  .hero h1 {
    font-size: 3.25rem;
  }
}