/* =========================================================================
   Seivei Consulting - Global Stylesheet
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-primary: #0f172a;      /* Deep Slate / Navy */
  --color-primary-light: #1e293b;
  --color-accent: #10b981;       /* Emerald / Teal */
  --color-accent-hover: #059669;
  --color-bg: #f8fafc;           /* Light background */
  --color-surface: #ffffff;      /* White cards */
  --color-text: #475569;         /* Body text */
  --color-heading: #0f172a;      /* Headings */
  --color-border: #e2e8f0;

  /* Typography */
  --font-family: 'Inter', sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Other */
  --border-radius-sm: 4px;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --transition: all 0.3s ease;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.2;
}

p {
  margin-bottom: var(--space-4);
}

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

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

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

ul {
  list-style: none;
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

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

.section-white {
  background-color: var(--color-surface);
}

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

.section-dark h2, .section-dark h3 {
  color: var(--color-surface);
}

.section-dark p {
  color: #cbd5e1; /* Lighter text for dark bg */
}

/* --- Typography Utilities --- */
.text-center { text-align: center; }
.section-header {
  margin-bottom: var(--space-16);
  text-align: center;
}
.section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-4);
}
.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  max-width: 700px;
  margin: 0 auto;
}
.section-dark .section-subtitle {
  color: #94a3b8;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: #ffffff;
}

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

.btn-outline:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

.btn-light:hover {
  background-color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--color-primary);
}


/* --- Grid System --- */
.grid {
  display: grid;
  gap: var(--space-8);
}
.grid-2 { grid-template-columns: repeat(1, 1fr); }
.grid-3 { grid-template-columns: repeat(1, 1fr); }
.grid-4 { grid-template-columns: repeat(1, 1fr); }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* --- Header / Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
  padding: var(--space-2) 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  transition: var(--transition);
}

.navbar.scrolled .nav-container {
  height: 70px;
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  color: var(--color-heading);
  font-weight: 500;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-accent);
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  position: relative;
  transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  left: 0;
  transition: var(--transition);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.nav-toggle.active .hamburger { background-color: transparent; }
.nav-toggle.active .hamburger::before { top: 0; transform: rotate(45deg); }
.nav-toggle.active .hamburger::after { bottom: 0; transform: rotate(-45deg); }


@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--color-surface);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
    gap: var(--space-6);
  }
  .nav-menu.active { left: 0; }
  .navbar.scrolled .nav-menu { top: 70px; height: calc(100vh - 70px); }
  .nav-link { font-size: var(--font-size-xl); }
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e293b 100%);
  color: #fff;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('hero-pattern.svg') center/cover;
  opacity: 0.05; /* Subtle background pattern */
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-8);
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  font-size: var(--font-size-5xl);
  color: #ffffff;
  margin-bottom: var(--space-6);
  line-height: 1.1;
  letter-spacing: -1px;
}

.hero-title span {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: #cbd5e1;
  margin-bottom: var(--space-8);
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateY(-10deg) rotateX(5deg);
  transition: var(--transition);
}

.hero-image-wrapper:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero-image-wrapper img {
  height: auto;
  object-fit: cover;
}

.hero-internal {
  min-height: 50vh;
  padding-top: 100px;
  display: flex;
  align-items: center;
  text-align: center;
}

.hero-internal .hero-container {
  grid-template-columns: 1fr;
}

.hero-internal .hero-content {
  max-width: 800px;
  margin: 0 auto;
}

@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    margin: 0 auto;
  }
  .hero-cta {
    justify-content: center;
  }
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  .hero-image-wrapper {
    transform: none;
    margin-top: var(--space-8);
  }
}

@media (max-width: 576px) {
  .hero-title { font-size: var(--font-size-3xl); }
}

/* --- Cards (Services, etc.) --- */
.card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(16, 185, 129, 0.3);
}

.card-icon {
  width: 60px;
  height: 60px;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-6);
  transition: var(--transition);
}

.card:hover .card-icon {
  background-color: var(--color-accent);
  color: #fff;
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

.card-text {
  color: var(--color-text);
  flex-grow: 1;
}

.card-link {
  margin-top: var(--space-4);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- Features / Why Us --- */
.feature-list {
  display: grid;
  gap: var(--space-6);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.feature-icon {
  color: var(--color-accent);
  font-size: var(--font-size-xl);
  margin-top: 4px; /* Align with text */
}

/* --- Testimonials --- */
.testimonial-card {
  background-color: var(--color-primary-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  position: relative;
}

.testimonial-quote {
  font-style: italic;
  font-size: var(--font-size-lg);
  color: #f1f5f9;
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 2;
}

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

.author-info h4 {
  color: #fff;
  margin-bottom: 0;
}

.author-info p {
  color: var(--color-accent);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-accent) 0%, rgba(5, 150, 105, 1) 100%);
  color: #fff;
  text-align: center;
  padding: var(--space-16) 0;
  border-radius: var(--border-radius-lg);
  margin: var(--space-12) var(--space-6);
}

.cta-section h2 {
  color: #fff;
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-primary);
  color: #f1f5f9;
  padding: var(--space-16) 0 var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: var(--space-4);
  display: inline-block;
}

.footer-desc {
  color: #94a3b8;
  max-width: 300px;
}

.footer-heading {
  color: #fff;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-6);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: #94a3b8;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #64748b;
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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