/* ===========================
   Custom Properties
   =========================== */

:root {
  --color-primary: #159a89;
  --color-primary-dark: #107a6c;
  --color-primary-light: #e6f7f5;
  --color-secondary: #001b43;
  --color-secondary-mid: #002a6b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --container-max: 1100px;
  --container-pad: clamp(1.25rem, 5vw, 2rem);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.07);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);

  --transition: 0.2s ease;
}

/* ===========================
   Reset & Base
   =========================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===========================
   Layout
   =========================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

section { padding-block: clamp(3.5rem, 8vw, 5.5rem); }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-secondary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 560px;
}

/* ===========================
   Buttons
   =========================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.75rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(21, 154, 137, 0.35);
}

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

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

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.22);
}

/* ===========================
   Header
   =========================== */

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1.5rem;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-secondary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

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

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.lang-switcher a {
  padding: 0.2rem 0.4rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}

.lang-switcher a:hover,
.lang-switcher a.active {
  color: var(--color-primary);
}

.lang-switcher .sep {
  color: var(--color-border);
  user-select: none;
}

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

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ===========================
   Hero
   =========================== */

#hero {
  background: linear-gradient(150deg, var(--color-secondary) 0%, var(--color-secondary-mid) 100%);
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 70% 50%, rgba(21, 154, 137, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 720px;
  padding-block: 4rem;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-primary);
  flex-shrink: 0;
}

#hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

#hero h1 .accent {
  color: var(--color-primary);
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(255, 255, 255, 0.72);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  align-items: center;
}

/* ===========================
   Services
   =========================== */

#services {
  background: var(--color-bg-alt);
}

.services-header {
  margin-bottom: 3rem;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 460px), 1fr));
  gap: 1.75rem;
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 2rem 2rem 2.25rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.service-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 0.5rem;
}

.service-card .card-sub {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.925rem;
  color: var(--color-text);
}

.service-list li::before {
  content: '';
  flex-shrink: 0;
  margin-top: 0.45em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* ===========================
   Value Props
   =========================== */

#why-us {
  background: #fff;
}

.why-header {
  text-align: center;
  margin-bottom: 3rem;
}

.why-header .section-sub {
  margin-inline: auto;
}

.props-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 2rem;
}

.prop-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  transition: box-shadow var(--transition);
}

.prop-card:hover {
  box-shadow: var(--shadow-sm);
}

.prop-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}

.prop-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.prop-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 0.5rem;
}

.prop-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===========================
   How It Works
   =========================== */

#how-it-works {
  background: var(--color-bg-alt);
}

.how-header {
  margin-bottom: 3rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 0;
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 2px;
  background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
  opacity: 0.3;
  pointer-events: none;
}

.step {
  padding: 0 1.5rem 1.5rem;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(21, 154, 137, 0.3);
}

.step h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 0.4rem;
}

.step p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ===========================
   Contact
   =========================== */

#contact {
  background: linear-gradient(150deg, var(--color-secondary) 0%, var(--color-secondary-mid) 100%);
  position: relative;
  overflow: hidden;
}

#contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 30% 50%, rgba(21, 154, 137, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  position: relative;
}

.contact-left h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.contact-left p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 2rem;
  font-size: 1.025rem;
  line-height: 1.7;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1.05rem;
  transition: opacity var(--transition);
}

.contact-email:hover {
  opacity: 0.8;
}

.contact-email svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-form-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.contact-form-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.35rem;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.65rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.925rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(21, 154, 137, 0.15);
}

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

.form-submit {
  width: 100%;
  padding: 0.85rem;
  font-size: 0.95rem;
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  letter-spacing: 0.02em;
}

.form-submit:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* ===========================
   Footer
   =========================== */

footer {
  background: var(--color-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.footer-logo span { color: var(--color-primary); }

.footer-copy {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-tagline {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-lang {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.footer-lang a {
  color: rgba(255, 255, 255, 0.5);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}

.footer-lang a:hover,
.footer-lang a.active {
  color: var(--color-primary);
}

.footer-lang .sep { color: rgba(255, 255, 255, 0.2); }

/* Form status messages */

.form-status {
  display: none;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 1rem;
  line-height: 1.5;
}

.form-status.success {
  display: block;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.form-status.error {
  display: block;
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.form-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ===========================
   Scroll Reveal
   =========================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===========================
   Responsive
   =========================== */

@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1rem var(--container-pad);
    gap: 0.25rem;
    box-shadow: var(--shadow-md);
  }

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

  .site-nav a {
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
  }

  .nav-toggle {
    display: flex;
  }
  
  .header-right .btn {
    display: none;
  }

  .steps-grid::before {
    display: none;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 1rem;
    padding: 0;
    align-items: start;
  }

  .step-number {
    margin-bottom: 0;
  }

  .step-text { padding-top: 0.75rem; }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .props-grid {
    grid-template-columns: 1fr;
  }

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