/* ===========================
   HYSECOL - Main Stylesheet
   Research Dossier Layout
   =========================== */

:root {
  --primary: #2C3E50;
  --secondary: #F8F7F4;
  --accent-gold: #C39F67;
  --accent-green: #7D8A74;
  --neutral-light: #E0E0E0;
  --neutral-grey: #6C7A89;
  --neutral-dark: #34495E;
  --base-spacing: 8px;
  --container-max: 1280px;
  --section-gap: 80px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Merriweather', 'Lora', serif;
  background-color: var(--secondary);
  color: var(--primary);
  line-height: 1.7;
  font-size: 16px;
}

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', 'Poppins', sans-serif;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: calc(var(--base-spacing) * 3);
}

h1 {
  font-size: 56px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: calc(var(--base-spacing) * 4);
  word-spacing: 0.1em;
}

h2 {
  font-size: 42px;
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: calc(var(--base-spacing) * 3);
}

h3 {
  font-size: 28px;
  line-height: 1.4;
  font-weight: 600;
  margin-bottom: calc(var(--base-spacing) * 2);
}

h4 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: calc(var(--base-spacing) * 2);
}

p {
  margin-bottom: calc(var(--base-spacing) * 3);
  line-height: 1.8;
  letter-spacing: 0.2px;
}

a {
  color: var(--accent-gold);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--accent-green);
  text-decoration: underline;
}

/* ===========================
   LAYOUT & CONTAINER
   =========================== */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 4);
}

.full-width {
  width: 100%;
}

section {
  padding: var(--section-gap) 0;
}

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

section.dark-section h1,
section.dark-section h2,
section.dark-section h3 {
  color: var(--secondary);
}

section.dark-section p {
  color: rgba(248, 247, 244, 0.9);
}

/* ===========================
   HEADER & NAVIGATION
   =========================== */

header {
  background-color: var(--primary);
  color: var(--secondary);
  padding: calc(var(--base-spacing) * 2) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 4);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: 'Montserrat', 'Poppins', sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--secondary);
}

nav ul {
  list-style: none;
  display: flex;
  gap: calc(var(--base-spacing) * 4);
}

nav a {
  color: var(--secondary);
  text-decoration: none;
  font-family: 'Montserrat', 'Poppins', sans-serif;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

nav a:hover,
nav a.active {
  color: var(--accent-gold);
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-gold);
}

/* ===========================
   HERO & SECTIONS
   =========================== */

.hero {
  background-color: var(--primary);
  color: var(--secondary);
  padding: calc(var(--section-gap) * 1.2) 0;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 4);
  z-index: 2;
  position: relative;
}

.hero h1 {
  color: var(--secondary);
  margin-bottom: calc(var(--base-spacing) * 3);
}

.hero p {
  color: rgba(248, 247, 244, 0.85);
  font-size: 18px;
  max-width: 600px;
}

/* ===========================
   CONTENT BLOCKS & CARDS
   =========================== */

.content-block {
  background-color: var(--secondary);
  padding: calc(var(--base-spacing) * 5);
  margin-bottom: calc(var(--base-spacing) * 4);
  border: 1px solid var(--neutral-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.3s ease;
}

.content-block:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--base-spacing) * 5);
  align-items: center;
}

.two-column.reverse {
  direction: rtl;
}

.two-column.reverse > * {
  direction: ltr;
}

.card {
  background-color: var(--secondary);
  padding: calc(var(--base-spacing) * 4);
  border: 1px solid var(--neutral-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  text-align: center;
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
  border-color: var(--accent-gold);
}

.card h3 {
  margin-top: calc(var(--base-spacing) * 2);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--base-spacing) * 4);
  margin-top: calc(var(--base-spacing) * 4);
}

/* ===========================
   IMAGES
   =========================== */

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--neutral-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.image-block {
  overflow: hidden;
  border: 1px solid var(--neutral-light);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.image-block img {
  border: none;
  box-shadow: none;
  width: 100%;
  height: auto;
}

/* ===========================
   BUTTONS & CTA
   =========================== */

.btn {
  display: inline-block;
  padding: calc(var(--base-spacing) * 2.5) calc(var(--base-spacing) * 4);
  font-family: 'Montserrat', 'Poppins', sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
}

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

.btn-primary:hover {
  background-color: #B8905A;
}

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

.btn-secondary:hover {
  background-color: var(--neutral-dark);
}

.btn-text {
  color: var(--accent-gold);
  text-decoration: none;
  border: none;
  background: none;
  cursor: pointer;
  font-family: 'Merriweather', 'Lora', serif;
  font-size: 16px;
}

.btn-text:hover {
  text-decoration: underline;
  color: var(--accent-green);
}

/* ===========================
   LISTS & CONTENT
   =========================== */

ul, ol {
  margin-bottom: calc(var(--base-spacing) * 3);
  padding-left: calc(var(--base-spacing) * 3);
}

li {
  margin-bottom: calc(var(--base-spacing) * 1.5);
  line-height: 1.8;
}

li::marker {
  color: var(--accent-gold);
  font-weight: 600;
}

/* ===========================
   FOOTER
   =========================== */

footer {
  background-color: var(--primary);
  color: var(--secondary);
  padding: calc(var(--section-gap) * 0.8) 0 calc(var(--base-spacing) * 3);
  margin-top: calc(var(--section-gap) * 1.2);
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 4);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--base-spacing) * 4);
  margin-bottom: calc(var(--base-spacing) * 4);
}

.footer-section h4 {
  color: var(--accent-gold);
  margin-bottom: calc(var(--base-spacing) * 2);
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section a {
  color: var(--secondary);
  text-decoration: none;
  font-size: 14px;
}

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

.footer-divider {
  border-top: 1px solid var(--neutral-grey);
  padding-top: calc(var(--base-spacing) * 3);
  text-align: center;
  color: var(--neutral-grey);
  font-size: 13px;
}

/* ===========================
   DISCLAIMER & CONTEXT BOX
   =========================== */

.disclaimer-box {
  background-color: #F0EBE3;
  border-left: 4px solid var(--accent-gold);
  padding: calc(var(--base-spacing) * 4);
  margin: calc(var(--base-spacing) * 4) 0;
  border-radius: 4px;
}

.disclaimer-box h4 {
  color: var(--primary);
  margin-bottom: calc(var(--base-spacing) * 2);
  font-size: 16px;
}

.disclaimer-box p {
  color: var(--neutral-dark);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: calc(var(--base-spacing) * 1.5);
}

.disclaimer-box ul {
  margin-left: calc(var(--base-spacing) * 2);
  font-size: 14px;
}

/* ===========================
   FORM ELEMENTS
   =========================== */

form {
  margin-bottom: calc(var(--base-spacing) * 4);
}

.form-group {
  margin-bottom: calc(var(--base-spacing) * 3);
}

label {
  display: block;
  font-family: 'Montserrat', 'Poppins', sans-serif;
  font-weight: 600;
  margin-bottom: calc(var(--base-spacing) * 1);
  color: var(--primary);
}

input, textarea, select {
  width: 100%;
  padding: calc(var(--base-spacing) * 2);
  border: 1px solid var(--neutral-light);
  border-radius: 4px;
  font-family: 'Merriweather', 'Lora', serif;
  font-size: 14px;
  background-color: white;
  transition: border-color 0.3s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px rgba(195, 159, 103, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

@media (max-width: 1024px) {
  .container {
    padding: 0 calc(var(--base-spacing) * 3);
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 32px;
  }

  .two-column {
    grid-template-columns: 1fr;
    gap: calc(var(--base-spacing) * 4);
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  nav ul {
    gap: calc(var(--base-spacing) * 2);
  }

  nav a {
    font-size: 13px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 60px;
  }

  .container {
    padding: 0 calc(var(--base-spacing) * 2);
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 20px;
  }

  .header-container {
    padding: 0 calc(var(--base-spacing) * 2);
  }

  nav ul {
    flex-direction: column;
    gap: calc(var(--base-spacing) * 2);
  }

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

  .content-block {
    padding: calc(var(--base-spacing) * 3);
  }

  body {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  :root {
    --section-gap: 50px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  nav ul {
    flex-direction: column;
  }
}