/* ==========================================================================
   Kaly-Conseil — Modern & Professional Design System
   ========================================================================== */

/* 1. Variables & Root */
:root {
  /* Colors - Based on #44606C */
  --kaly-deep:     #44606C;
  --kaly-dark:     #2D3E47;
  --kaly-medium:   #5A7A88;
  --kaly-light:    #8AACB8;
  --kaly-pale:     #D4E3EA;
  --kaly-cream:    #F2F5F7;
  --kaly-warm:     #E8C8A0;
  --kaly-white:    #FFFFFF;
  --kaly-charcoal: #1A2428;
  
  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans:  'DM Sans', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Utils */
  --nav-h: 80px;
  --radius: 8px;
  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
  --shadow-md: 0 10px 30px rgba(68, 96, 108, 0.1);
  --shadow-lg: 0 20px-40px rgba(0,0,0,0.1);
}

/* 2. Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  background: var(--kaly-cream);
  color: var(--kaly-charcoal);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { display: block; max-width: 100%; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

section {
  padding: var(--spacing-lg) 0;
}

/* 3. Typography Helpers */
.text-serif { font-family: var(--font-serif); }
.italic { font-style: italic; }
.section-title {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  margin-bottom: var(--spacing-md);
  color: var(--kaly-dark);
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--kaly-medium);
  margin-bottom: var(--spacing-sm);
  display: block;
}

/* 4. Header & Nav */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(242, 245, 247, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(68, 96, 108, 0.1);
  transition: var(--transition);
}

.header.scrolled {
  height: 70px;
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-pyramid {
  width: 30px;
  height: 30px;
  background: var(--kaly-deep);
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--kaly-deep);
  line-height: 1;
}

.logo-sub {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--kaly-medium);
}

.nav-links {
  display: flex;
  gap: 3rem;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--kaly-dark);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--kaly-deep);
  transition: var(--transition);
}

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

/* 5. Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 1rem 2.5rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition);
}

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

.btn-primary:hover {
  background: var(--kaly-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 2px solid var(--kaly-deep);
  color: var(--kaly-deep);
}

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

/* 6. Hero Section with 3D Pyramid */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5rem);
  margin-bottom: var(--spacing-md);
}

.hero-title em {
  font-style: italic;
  color: var(--kaly-deep);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--kaly-medium);
  margin-bottom: var(--spacing-md);
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 20px;
}

/* 3D Pyramid container */
.pyramid-container {
  perspective: 1000px;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pyramid {
  position: relative;
  width: 200px;
  height: 200px;
  transform-style: preserve-3d;
  animation: rotatePyramid 20s infinite linear;
}

@keyframes rotatePyramid {
  from { transform: rotateY(0deg) rotateX(25deg); }
  to { transform: rotateY(360deg) rotateX(25deg); }
}

.pyramid div {
  position: absolute;
  width: 0;
  height: 0;
  border-left: 100px solid transparent;
  border-right: 100px solid transparent;
  border-bottom: 173px solid var(--kaly-deep);
  opacity: 0.9;
}

.pyramid .side1 { transform: rotateY(0deg) rotateX(30deg) translateZ(0); transform-origin: 50% 100%; border-bottom-color: var(--kaly-deep); }
.pyramid .side2 { transform: rotateY(90deg) rotateX(30deg) translateZ(0); transform-origin: 50% 100%; border-bottom-color: var(--kaly-medium); }
.pyramid .side3 { transform: rotateY(180deg) rotateX(30deg) translateZ(0); transform-origin: 50% 100%; border-bottom-color: var(--kaly-dark); }
.pyramid .side4 { transform: rotateY(270deg) rotateX(30deg) translateZ(0); transform-origin: 50% 100%; border-bottom-color: var(--kaly-light); }

.pyramid .bottom {
  position: absolute;
  width: 200px;
  height: 200px;
  background: var(--kaly-charcoal);
  transform: rotateX(90deg) translateZ(-173px);
  border: none;
}

/* 7. Feature Cards (Pillars) */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.pillar-card {
  background: var(--kaly-white);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid rgba(68, 96, 108, 0.05);
}

.pillar-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.pillar-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  display: block;
}

.pillar-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--kaly-deep);
}

/* 8. Values Section */
.values-section {
  background: var(--kaly-deep);
  color: var(--kaly-white);
}

.values-section .section-title {
  color: var(--kaly-white);
  text-align: center;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.value-item h4 {
  font-size: 1.25rem;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.value-item p {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* 9. Resources Grid */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 40px;
}

.resource-card {
  background: var(--kaly-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.resource-img {
  height: 200px;
  background: var(--kaly-pale);
  display: flex;
  align-items: center;
  justify-content: center;
}

.resource-content {
  padding: var(--spacing-md);
}

.resource-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--kaly-deep);
  font-weight: 700;
  margin-bottom: 10px;
  display: block;
}

/* 10. Footer */
.footer {
  background: var(--kaly-dark);
  color: var(--kaly-white);
  padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: var(--spacing-md);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
  opacity: 0.6;
}

/* 11. Responsive */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-description { margin: 0 auto var(--spacing-md); }
  .hero-actions { justify-content: center; }
  .pyramid-container { height: 300px; }
  .nav-links { display: none; }
  .pillars-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .section-title { font-size: 2.5rem; }
}