/* ==========================================================================
   1. CSS VARIABLES & RESET
   ========================================================================== */
:root {
  --color-primary: #f5a300;
  --color-primary-dark: #b38322;
  --color-primary-light: #d8a238;
  --color-secondary: #5c8761;

  --color-bg-main: #f7f4ef;
  --color-bg-alt: #f6f4ef;
  --color-bg-card: #f1ece4;
  --color-bg-card-light: #faf8f3;
  --color-white: #ffffff;
  --color-black: #000000;

  --card-tint-1: #ece8dc;
  --card-tint-2: #dce0d8;
  --card-tint-3: #e0d8d0;
  --card-tint-4: #f8f4e8;
  --card-tint-5: #e0e0d8;

  --text-dark: #222222;
  --text-muted: #444444;
  --text-body: #666666;
  --text-light: #777777;
  --text-gray: #7a7a7a;

  --font-main: 'Inter', Arial, sans-serif;
  --section-padding: 100px 60px;
  --border-radius-pill: 50px;
  --transition-smooth: all 0.3s ease;
  --transition-fade: opacity 0.2s ease-in-out;

  --max-content-width: 1440px;

  --fs-section-tag: 12px;
  --fs-section-h2: 44px;
  --fs-section-h3: 20px;
  --fs-body: 16px;
  --fs-body-small: 14px;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg-main);
  color: var(--text-body);
  line-height: 1.6;
}

/* ==========================================================================
   2. NAVBAR & NAVIGATION
   ========================================================================== */
.navbar {
  background-color: var(--color-bg-main);
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 60px;
  height: 5rem;
  max-height: 64px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.logo {
  width: auto;
}

.logo a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  font-weight: 500;
  color: var(--color-black);
  text-decoration: none;
}

.logo img {
  height: 50px;
  width: auto;
  flex-shrink: 0;
}

.logo span {
  display: inline-block;
  line-height: 1;
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav-links a {
  color: var(--color-black);
  text-decoration: none;
  font-size: medium;
  position: relative;
  font-weight: 500;
  transition: color var(--transition-smooth);
}

/* Custom Nav Underline Animations */
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--color-black);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a.active::after,
.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-links:hover a.active::after {
  transform: scaleX(0);
}

.nav-links:hover a:hover::after {
  transform: scaleX(1);
}

.appointment-btn {
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  padding: 12px 24px;
  border-radius: var(--border-radius-pill);
  font-size: var(--fs-body-small);
  display: inline-block;
  font-weight: 600;
  transition: transform var(--transition-smooth), background-color var(--transition-smooth);
}

.appointment-btn:hover {
  transform: scale(1.05);
}

/* Hamburger Menu Icon */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
}

.menu-toggle span {
  width: 28px;
  height: 3px;
  background-color: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

/* ==========================================================================
   3. ARTICLE & CONTENT LAYOUT (Desktop)
   ========================================================================== */
.container {
  max-width: 900px;
  margin: 0 auto;
}

.text-center {
  text-align: center;
}

#hero-section {
  background: var(--color-bg-main);
  padding: 140px 20px 80px;
}

.main-title {
  font-size: 48px;
  line-height: 1.2;
  color: var(--text-dark);
  margin: 24px 0 16px;
  font-weight: 700;
}

.author-name {
  color: var(--color-secondary);
  font-size: var(--fs-section-h3);
  font-weight: 600;
  margin: 0;
}

#content-section {
  background: var(--color-bg-main);
  padding: 0 20px 120px;
}

.article-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--color-white);
  border-radius: 24px;
  padding: 70px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.05);
}

.intro-text {
  font-size: 16px;
  line-height: 2;
  color: var(--text-dark);
  margin-bottom: 30px;
}

.body-text {
  font-size: var(--fs-body);
  line-height: 2;
  color: var(--text-body);
  margin-bottom: 28px;
}

.highlight-quote {
  margin: 50px 0;
  padding: 35px;
  background: var(--card-tint-4);
  border-left: 5px solid var(--color-primary);
  border-radius: 18px;
  color: var(--text-dark);
  font-size: 20px;
  line-height: 1.8;
  font-weight: 600;
}

.footer-quote {
  margin: 60px 0 0;
  padding: 40px;
  background: linear-gradient(135deg, var(--card-tint-4), var(--card-tint-1));
  border-radius: 20px;
  text-align: center;
  color: var(--text-dark);
  font-size: 20px;
  line-height: 1.8;
  font-weight: 700;
}

.research-box {
  margin: 50px 0;
  padding: 35px;
  background: var(--card-tint-1);
  border-radius: 20px;
}

.research-title {
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--text-dark);
  font-size: 24px;
}

.research-content {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--text-muted);
}

/* ==========================================================================
   4. TABLET RESPONSIVE STYLES (Max-width: 1024px)
   ========================================================================== */
@media screen and (max-width: 1024px) {
  .navbar {
    padding: 8px 32px;
  }

  .nav-links {
    gap: 24px;
  }

  #hero-section {
    padding: 100px 32px 60px;
  }

  .main-title {
    font-size: 32px;
  }

  #content-section {
    padding: 0 32px 80px;
  }

  .article-card {
    padding: 50px;
    border-radius: 20px;
  }

  .intro-text {
    font-size: 20px;
    line-height: 1.8;
  }

  .highlight-quote {
    font-size: 20px;
    padding: 28px;
    margin: 40px 0;
  }

  .footer-quote {
    font-size: 16px;
    padding: 32px;
    margin-top: 50px;
  }
}

/* ==========================================================================
   5. MOBILE RESPONSIVE STYLES (Max-width: 768px)
   ========================================================================== */
@media screen and (max-width: 768px) {

  .menu-toggle {
    display: flex;
  }

  .navbar {
    padding: 8px 20px;
    height: 4.5rem;
  }


  .nav-links {
    position: absolute;
    top: 4.5rem;
    left: 0;
    right: 0;
    background-color: var(--color-bg-main);
    flex-direction: column;
    align-items: center;
    gap: 0;
    width: 100%;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    

    display: none; 
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  }


  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    display: block;
    padding: 16px 0;
    width: 100%;
    border-top: 1px solid rgba(0, 0, 0, 0.03);
  }

  .nav-links a::after {
    display: none; /* मोबाइल में अंडरलाइन एनिमेशन हटाना */
  }

  .appointment-btn {
    padding: 10px 20px;
    font-size: 13px;
  }

  /* Article Content Adjustment for Mobile */
  #hero-section {
    padding: 60px 20px 40px;
  }

  .main-title {
    font-size: 32px;
    margin: 16px 0 12px;
  }

  .author-name {
    font-size: 16px;
  }

  #content-section {
    padding: 0 16px 60px;
  }

  .article-card {
    padding: 30px 20px;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.04);
  }

  .intro-text {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 24px;
  }

  .body-text {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
  }

  .highlight-quote {
    font-size: 16px;
    padding: 20px;
    margin: 30px 0;
    border-left-width: 4px;
    border-radius: 12px;
  }

  .research-box {
    margin: 30px 0;
    padding: 24px;
    border-radius: 14px;
  }

  .research-title {
    font-size: 16px;
    margin-bottom: 10px;
  }

  .footer-quote {
    font-size: 16px;
    padding: 24px 16px;
    margin-top: 40px;
    border-radius: 14px;
  }
}