/*
Theme Name:  Ahsan Platform
Theme URI:   https://www.ou.edu/coe/ise/people/manjurul-ahsan
Author:      Md Manjurul Ahsan
Author URI:  https://www.ou.edu/coe/ise/people/manjurul-ahsan
Description: Minimal academic faculty theme for Dr. Md Manjurul Ahsan, Research Assistant Professor, University of Oklahoma.
Version:     2.0.0
License:     GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ahsan-faculty
Tags:        one-page, academic, minimal, responsive
*/

/* ================================================================
   AHSAN FACULTY THEME
   Typography: EB Garamond (serif) + DM Sans (sans)
   Palette:    White · Navy #1a3a5c · Teal #1d6a6a
   ================================================================ */

/* ----------------------------------------------------------------
   1. RESET & CUSTOM PROPERTIES
---------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg:        #ffffff;
  --color-surface:   #f8f8f6;
  --color-border:    #e4e2dd;
  --color-border-lt: #f0ede8;
  --color-ink:       #1a1916;
  --color-ink-mid:   #4a4844;
  --color-ink-light: #8a8680;
  --color-accent:    #1a3a5c;
  --color-accent-lt: #e8eef5;
  --color-teal:      #1d6a6a;
  --color-teal-lt:   #e5f2f2;
  --color-warn:      #7a4a1a;
  --color-warn-lt:   #f5ebe0;

  --font-serif: 'EB Garamond', Georgia, 'Times New Roman', serif;
  --font-sans:  'DM Sans', 'Helvetica Neue', Arial, sans-serif;

  --space-xs:  0.375rem;
  --space-sm:  0.75rem;
  --space-md:  1.25rem;
  --space-lg:  2rem;
  --space-xl:  3.5rem;
  --space-2xl: 6rem;

  --container-max: 1100px;
  --section-pad:   5rem;

  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --transition: 200ms ease;
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-teal); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* ----------------------------------------------------------------
   2. LAYOUT UTILITIES
---------------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.section-number {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-ink-light);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  line-height: 1.1;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--color-ink-mid);
  max-width: 640px;
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.subsection-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.inline-link {
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1px;
  transition: border-color var(--transition);
}
.inline-link:hover { border-color: var(--color-accent); }

/* ----------------------------------------------------------------
   3. BUTTONS
---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.65em 1.5em;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid transparent;
  text-decoration: none;
  line-height: 1;
}

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

.btn-ghost {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-ink-mid); color: var(--color-ink); }

.btn-full { width: 100%; justify-content: center; }

/* ----------------------------------------------------------------
   4. NAVIGATION
---------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-lt);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 1px 8px rgba(0,0,0,0.06); }

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-accent);
}
.nav-logo:hover { color: var(--color-teal); }

.nav-links { display: flex; gap: var(--space-lg); }

.nav-links a {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-mid);
  transition: color var(--transition);
  padding: 0.3em 0;
  border-bottom: 1.5px solid transparent;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-ink);
  transition: all var(--transition);
}

/* ----------------------------------------------------------------
   5. HERO
---------------------------------------------------------------- */
.hero-section {
  padding-top: calc(var(--section-pad) + 1rem);
  padding-bottom: var(--section-pad);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-xl);
  align-items: start;
}

.hero-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-sm);
}

.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.hero-affil {
  font-size: 0.875rem;
  color: var(--color-ink-light);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--color-ink-mid);
  max-width: 580px;
  line-height: 1.75;
  margin-bottom: var(--space-lg);
}

.hero-tags { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-bottom: var(--space-lg); }
.hero-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  background: var(--color-accent-lt);
  padding: 0.3em 0.85em;
  border-radius: 2px;
}

.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

.hero-aside { display: flex; flex-direction: column; gap: var(--space-lg); align-items: center; }

.hero-photo-frame {
  width: 220px;
  height: 270px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.hero-photo-placeholder {
  width: 100%;
  height: 100%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-photo-placeholder span {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 500;
  color: var(--color-ink-light);
  letter-spacing: 0.08em;
}

/* Replace placeholder when a real photo is used */
.hero-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  width: 100%;
  justify-content: center;
}

.stat { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.stat strong {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1;
}
.stat span {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-light);
}
.stat-divider { width: 1px; height: 28px; background: var(--color-border); }

/* ----------------------------------------------------------------
   6. ABOUT
---------------------------------------------------------------- */
.about-section {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-2xl);
  align-items: start;
}

.about-text p {
  font-size: 1rem;
  color: var(--color-ink-mid);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--color-ink); font-weight: 500; }
.about-text a { color: var(--color-accent); border-bottom: 1px solid var(--color-border); padding-bottom: 1px; }
.about-text a:hover { border-color: var(--color-accent); }

.about-info-block {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}
.about-info-block:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.about-info-block h4 {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-light);
  margin-bottom: var(--space-sm);
}
.about-info-block ul li { font-size: 0.875rem; color: var(--color-ink-mid); line-height: 1.6; padding: 0.2em 0; }

/* ----------------------------------------------------------------
   7. RESEARCH
---------------------------------------------------------------- */
.research-section { background-color: var(--color-bg); }

.research-areas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.research-card {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.research-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-accent); }

.research-card-icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent-lt);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.research-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.35;
  margin-bottom: var(--space-sm);
}
.research-card p { font-size: 0.875rem; color: var(--color-ink-mid); line-height: 1.7; margin-bottom: var(--space-md); }

.research-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.research-tags li {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-teal);
  background: var(--color-teal-lt);
  padding: 0.25em 0.7em;
  border-radius: 2px;
}

.projects-list { display: flex; flex-direction: column; gap: var(--space-lg); }

.project-item {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--color-surface);
}

.project-meta { display: flex; align-items: center; gap: var(--space-md); margin-bottom: var(--space-sm); }

.project-funder {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-lt);
  padding: 0.2em 0.6em;
  border-radius: 2px;
}
.project-year { font-size: 0.8rem; color: var(--color-ink-light); }
.project-item h4 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}
.project-item p { font-size: 0.875rem; color: var(--color-ink-mid); line-height: 1.7; }

/* ----------------------------------------------------------------
   8. PUBLICATIONS
---------------------------------------------------------------- */
.publications-section {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pub-filter { display: flex; gap: var(--space-sm); margin-bottom: var(--space-lg); flex-wrap: wrap; }

.pub-filter-btn {
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--font-sans);
  letter-spacing: 0.04em;
  padding: 0.4em 1em;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-ink-mid);
  cursor: pointer;
  transition: all var(--transition);
}
.pub-filter-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pub-filter-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }

.publications-list { list-style: none; display: flex; flex-direction: column; gap: 0; }

.pub-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border-lt);
  align-items: start;
  transition: background var(--transition);
}
.pub-item:last-child { border-bottom: none; }
.pub-item:hover { background: var(--color-bg); }
.pub-item.hidden { display: none; }

.pub-year { font-size: 0.78rem; font-weight: 500; color: var(--color-ink-light); padding-top: 3px; letter-spacing: 0.04em; }

.pub-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 0.35em;
  color: var(--color-ink);
}
.pub-title a { color: inherit; border-bottom: 1px solid var(--color-border); padding-bottom: 1px; transition: all var(--transition); }
.pub-title a:hover { color: var(--color-accent); border-bottom-color: var(--color-accent); }

.pub-authors { font-size: 0.85rem; color: var(--color-ink-mid); margin-bottom: 0.3em; }
.pub-venue { font-size: 0.85rem; color: var(--color-ink-light); margin-bottom: 0.5em; }

.pub-badges { display: flex; gap: 6px; flex-wrap: wrap; }

.badge { font-size: 0.65rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; padding: 0.2em 0.65em; border-radius: 2px; }
.badge-journal  { background: var(--color-accent-lt); color: var(--color-accent); }
.badge-conf     { background: var(--color-teal-lt);   color: var(--color-teal); }
.badge-revision { background: var(--color-warn-lt);   color: var(--color-warn); }

.pub-note { font-size: 0.85rem; color: var(--color-ink-light); margin-top: var(--space-lg); padding-top: var(--space-lg); border-top: 1px solid var(--color-border); }

/* ----------------------------------------------------------------
   9. BLOG
---------------------------------------------------------------- */
.blog-section { background-color: var(--color-bg); }

.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }

.blog-card-featured {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-items: start;
}

.blog-card {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.blog-card:hover { box-shadow: var(--shadow-md); }

.blog-card-meta { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-sm); }

.blog-cat {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-teal);
  background: var(--color-teal-lt);
  padding: 0.2em 0.65em;
  border-radius: 2px;
}
.blog-date { font-size: 0.78rem; color: var(--color-ink-light); }

.blog-card-title { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 500; line-height: 1.4; margin-bottom: var(--space-sm); color: var(--color-ink); }
.blog-card-featured .blog-card-title { font-size: 1.5rem; line-height: 1.3; }
.blog-card-title a { color: inherit; }
.blog-card-title a:hover { color: var(--color-accent); }

.blog-card-excerpt { font-size: 0.88rem; color: var(--color-ink-mid); line-height: 1.75; flex-grow: 1; margin-bottom: var(--space-md); }
.blog-card-featured .blog-card-excerpt { font-size: 0.95rem; }

.blog-read-more {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
  display: inline-block;
  margin-top: auto;
}
.blog-read-more:hover { border-bottom-color: var(--color-accent); color: var(--color-accent); }

/* ----------------------------------------------------------------
   10. CONTACT
---------------------------------------------------------------- */
.contact-section {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: start; }

.contact-intro { font-size: 1rem; color: var(--color-ink-mid); line-height: 1.75; margin-bottom: var(--space-xl); }

.contact-details { display: flex; flex-direction: column; gap: var(--space-lg); margin-bottom: var(--space-xl); }

.contact-detail-item { display: grid; grid-template-columns: 80px 1fr; gap: var(--space-md); align-items: start; }

.contact-label { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-ink-light); padding-top: 2px; }
.contact-detail-item a, .contact-detail-item span { font-size: 0.9rem; color: var(--color-ink-mid); line-height: 1.6; }
.contact-detail-item a { color: var(--color-accent); border-bottom: 1px solid var(--color-border); padding-bottom: 1px; }
.contact-detail-item a:hover { border-color: var(--color-accent); }

.contact-links { display: flex; flex-wrap: wrap; gap: 6px; }
.contact-link-pill {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-ink-mid);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 0.25em 0.75em;
  border-radius: 2px;
  transition: all var(--transition);
}
.contact-link-pill:hover { border-color: var(--color-accent); color: var(--color-accent); }

.recruiting-notice {
  font-size: 0.875rem;
  color: var(--color-ink-mid);
  line-height: 1.65;
  background: var(--color-accent-lt);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.recruiting-notice strong { color: var(--color-accent); }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.form-group { display: flex; flex-direction: column; gap: 0.4em; }
.form-group label { font-size: 0.78rem; font-weight: 500; letter-spacing: 0.05em; color: var(--color-ink-mid); text-transform: uppercase; }

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.65em 0.9em;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a8680' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9em center;
  padding-right: 2.5em;
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(26,58,92,0.08);
  background: var(--color-bg);
}

.form-group input::placeholder, .form-group textarea::placeholder { color: var(--color-ink-light); font-weight: 300; }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: 0.78rem; color: var(--color-ink-light); text-align: center; }

/* ----------------------------------------------------------------
   11. FOOTER
---------------------------------------------------------------- */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.6);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.footer-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-lg); align-items: center; }

.footer-name { font-family: var(--font-serif); font-size: 1rem; font-weight: 500; color: rgba(255,255,255,0.9); margin-bottom: 0.2em; }
.footer-title { font-size: 0.78rem; color: rgba(255,255,255,0.45); line-height: 1.6; }

.footer-nav { display: flex; gap: var(--space-lg); }
.footer-nav a { font-size: 0.78rem; font-weight: 400; letter-spacing: 0.06em; text-transform: uppercase; color: rgba(255,255,255,0.5); transition: color var(--transition); }
.footer-nav a:hover { color: rgba(255,255,255,0.9); }

.footer-right { text-align: right; }
.footer-copy { font-size: 0.75rem; color: rgba(255,255,255,0.4); line-height: 1.6; }

/* ----------------------------------------------------------------
   12. SCROLL REVEAL
---------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 400ms ease, transform 400ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ----------------------------------------------------------------
   13. GENERIC PAGE (page.php / index.php)
---------------------------------------------------------------- */
.page-content-wrap {
  padding: var(--section-pad) 0;
  min-height: 60vh;
}

.page-content-wrap .entry-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.page-content-wrap .entry-content p { font-size: 1rem; color: var(--color-ink-mid); line-height: 1.8; margin-bottom: var(--space-md); }
.page-content-wrap .entry-content h2 { font-family: var(--font-serif); font-size: 1.6rem; font-weight: 500; margin: var(--space-xl) 0 var(--space-md); }
.page-content-wrap .entry-content h3 { font-family: var(--font-serif); font-size: 1.25rem; font-weight: 500; margin: var(--space-lg) 0 var(--space-sm); }
.page-content-wrap .entry-content ul, .page-content-wrap .entry-content ol { padding-left: 1.5em; margin-bottom: var(--space-md); }
.page-content-wrap .entry-content li { list-style: disc; font-size: 1rem; color: var(--color-ink-mid); line-height: 1.7; margin-bottom: 0.35em; }
.page-content-wrap .entry-content a { color: var(--color-accent); border-bottom: 1px solid var(--color-border); }
.page-content-wrap .entry-content a:hover { border-color: var(--color-accent); }

/* ----------------------------------------------------------------
   14. RESPONSIVE
---------------------------------------------------------------- */
@media (max-width: 1024px) {
  .research-areas { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-aside { flex-direction: row; align-items: flex-start; }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .blog-card-featured { grid-column: span 3; grid-template-columns: 1fr; gap: var(--space-md); }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-lg); text-align: center; }
  .footer-nav { justify-content: center; flex-wrap: wrap; }
  .footer-right { text-align: center; }
}

@media (max-width: 720px) {
  :root { --section-pad: 3.5rem; }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.9em var(--space-lg); border-bottom: 1px solid var(--color-border-lt); }
  .nav-links a:last-child { border-bottom: none; }
  .nav-toggle { display: flex; }

  .hero-aside { flex-direction: column; }
  .hero-stats { width: 100%; }
  .research-areas { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .blog-card-featured { grid-column: span 1; }
  .contact-detail-item { grid-template-columns: 70px 1fr; }
  .contact-form { padding: var(--space-lg); }
  .pub-item { grid-template-columns: 44px 1fr; gap: var(--space-md); }
  .section-title { font-size: 1.85rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ================================================================
   PLATFORM ADDITIONS — Books, Videos, Identity tiles, Footer
================================================================ */

/* Tokens */
:root {
  --navy:     #1a3a5c;
  --navy-lt:  #e8eef5;
  --teal:     #1d6a6a;
  --teal-lt:  #e5f2f2;
}

/* Identity tiles */
.identity-section { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: var(--sp-xl, 3.5rem) 0; }
.identity-grid    { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--sp-lg, 2rem); }
.identity-tile {
  display: flex; flex-direction: column; align-items: flex-start;
  padding: var(--sp-lg, 2rem); border: 1px solid var(--border);
  border-radius: var(--radius-md, 6px); background: var(--color-bg, #fff);
  text-decoration: none; transition: box-shadow 200ms ease, border-color 200ms ease;
}
.identity-tile:hover { box-shadow: 0 4px 12px rgba(0,0,0,.08); border-color: var(--navy); color: var(--color-ink, #1a1916); }
.tile-icon {
  width: 44px; height: 44px; border-radius: 3px;
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem; font-weight: 700; letter-spacing: .04em; margin-bottom: 1.25rem;
}
.tile-icon-navy { background: var(--navy-lt); color: var(--navy); }
.tile-icon-teal { background: var(--teal-lt);  color: var(--teal); }
.identity-tile h3 { font-family: var(--font-serif,'EB Garamond',serif); font-size: 1.1rem; font-weight: 500; color: var(--color-ink,#1a1916); margin-bottom:.35em; }
.identity-tile p  { font-size:.85rem; color: var(--color-ink-mid,#4a4844); line-height:1.6; flex-grow:1; margin-bottom:1.25rem; }
.tile-link        { font-size:.78rem; font-weight:500; color: var(--navy); }

/* Books */
.books-section { background: var(--color-bg, #fff); }
.books-grid    { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.book-card     { border: 1px solid var(--color-border,#e4e2dd); border-radius: 6px; overflow: hidden; background: #fff; display: flex; flex-direction: column; transition: box-shadow 200ms ease; }
.book-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.book-cover    { aspect-ratio: 2/3; background: var(--color-surface,#f8f8f6); border-bottom: 1px solid var(--color-border,#e4e2dd); overflow: hidden; position: relative; display: flex; align-items: center; justify-content: center; }
.book-cover img { width:100%; height:100%; object-fit: cover; }
.book-cover-placeholder { width:100%; height:100%; background: linear-gradient(135deg, var(--navy-lt) 0%, var(--teal-lt) 100%); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .75rem; padding: 2rem; text-align: center; }
.book-cover-placeholder span { font-family: var(--font-serif,'EB Garamond',serif); font-size: 1.05rem; font-weight:500; color: var(--navy); line-height:1.3; }
.book-cover-placeholder em   { font-size:.72rem; color: var(--color-ink-light,#8a8680); font-style:normal; }
.book-lang-badge { position: absolute; top: 8px; right: 8px; font-size:.6rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; padding:.2em .6em; border-radius:2px; }
.badge-english   { background: var(--navy-lt); color: var(--navy); }
.badge-bengali   { background: #fdf3e7; color: #b5651d; }
.book-body       { padding: 2rem; display: flex; flex-direction: column; flex-grow:1; }
.book-title      { font-family: var(--font-serif,'EB Garamond',serif); font-size:1.1rem; font-weight:500; color: var(--color-ink,#1a1916); line-height:1.35; margin-bottom:.35em; }
.book-author     { font-size:.8rem; color: var(--color-ink-light,#8a8680); margin-bottom:.5em; }
.book-desc       { font-size:.875rem; color: var(--color-ink-mid,#4a4844); line-height:1.65; flex-grow:1; margin-bottom:1rem; }
.book-status     { font-size:.72rem; font-weight:500; color: var(--teal); letter-spacing:.04em; margin-bottom:1rem; }
.book-status.coming-soon { color: #b5651d; }
.book-actions    { display:flex; gap:.75rem; flex-wrap:wrap; }
.book-actions .btn { flex:1; min-width:0; }

/* Videos */
.videos-section { background: var(--color-surface,#f8f8f6); border-top:1px solid var(--color-border,#e4e2dd); border-bottom:1px solid var(--color-border,#e4e2dd); }
.video-featured { margin-bottom: 3.5rem; border-radius: 6px; overflow:hidden; border:1px solid var(--color-border,#e4e2dd); }
.video-featured-embed { position:relative; padding-bottom:56.25%; height:0; overflow:hidden; background:#1a1916; }
.video-featured-embed iframe { position:absolute; top:0; left:0; width:100%; height:100%; border:none; }
.video-featured-caption { padding: 1.25rem 2rem; background:#fff; border-top:1px solid var(--color-border,#e4e2dd); }
.video-featured-caption h3 { font-family: var(--font-serif,'EB Garamond',serif); font-size:1.1rem; font-weight:500; color: var(--color-ink,#1a1916); margin-bottom:.3em; }
.video-featured-caption p  { font-size:.875rem; color: var(--color-ink-mid,#4a4844); }
.video-grid     { display:grid; grid-template-columns:repeat(3,1fr); gap:2rem; }
.video-card     { border:1px solid var(--color-border,#e4e2dd); border-radius:6px; overflow:hidden; background:#fff; display:flex; flex-direction:column; transition:box-shadow 200ms ease; }
.video-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.video-thumb    { position:relative; aspect-ratio:16/9; background:#1a1916; overflow:hidden; display:block; }
.video-thumb img { width:100%; height:100%; object-fit:cover; transition:transform 300ms ease; }
.video-card:hover .video-thumb img { transform:scale(1.03); }
.video-thumb-placeholder { width:100%; height:100%; background:linear-gradient(135deg,#1a1916 0%,#2a2a28 100%); display:flex; align-items:center; justify-content:center; }
.play-icon { width:44px; height:44px; border-radius:50%; background:rgba(255,255,255,.15); border:2px solid rgba(255,255,255,.4); display:flex; align-items:center; justify-content:center; transition:background 200ms ease; }
.video-card:hover .play-icon { background:rgba(255,255,255,.25); }
.play-icon::after { content:''; width:0; height:0; border-top:8px solid transparent; border-bottom:8px solid transparent; border-left:13px solid rgba(255,255,255,.9); margin-left:3px; }
.video-cat-badge { position:absolute; top:8px; left:8px; font-size:.6rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; padding:.2em .6em; border-radius:2px; background:rgba(0,0,0,.5); color:rgba(255,255,255,.9); backdrop-filter:blur(4px); }
.video-card-body  { padding:1.25rem; flex-grow:1; display:flex; flex-direction:column; }
.video-card-title { font-family:var(--font-serif,'EB Garamond',serif); font-size:.95rem; font-weight:500; color:var(--color-ink,#1a1916); line-height:1.4; margin-bottom:.3em; }
.video-card-title a { color:inherit; }
.video-card-title a:hover { color:var(--navy); }
.video-card-meta  { font-size:.78rem; color:var(--color-ink-light,#8a8680); margin-top:auto; padding-top:.75rem; }
.videos-cta       { margin-top:3.5rem; text-align:center; }
.videos-cta p     { font-size:.95rem; color:var(--color-ink-mid,#4a4844); margin-bottom:1.25rem; }

/* Footer platform */
.footer-top { display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:3.5rem; padding-bottom:3.5rem; border-bottom:1px solid rgba(255,255,255,.08); margin-bottom:1.25rem; }
.footer-brand-name  { font-family:var(--font-serif,'EB Garamond',serif); font-size:1rem; font-weight:500; color:rgba(255,255,255,.9); margin-bottom:.3em; }
.footer-brand-title { font-size:.78rem; color:rgba(255,255,255,.4); line-height:1.6; margin-bottom:1.25rem; }
.footer-brand-links { display:flex; flex-wrap:wrap; gap:6px; }
.footer-brand-links a { font-size:.7rem; color:rgba(255,255,255,.45); border:1px solid rgba(255,255,255,.15); padding:.2em .6em; border-radius:2px; transition:all 200ms ease; }
.footer-brand-links a:hover { color:rgba(255,255,255,.9); border-color:rgba(255,255,255,.4); }
.footer-col h5  { font-size:.68rem; font-weight:500; letter-spacing:.12em; text-transform:uppercase; color:rgba(255,255,255,.35); margin-bottom:1.25rem; }
.footer-col li  { margin-bottom:.4em; }
.footer-col li a { font-size:.82rem; color:rgba(255,255,255,.5); transition:color 200ms ease; }
.footer-col li a:hover { color:rgba(255,255,255,.9); }
.footer-bottom  { display:flex; align-items:center; justify-content:space-between; }
.footer-copy    { font-size:.75rem; color:rgba(255,255,255,.3); }

/* Page hero for inner pages */
.page-hero { padding:5rem 0 3.5rem; border-bottom:1px solid var(--color-border,#e4e2dd); background:var(--color-surface,#f8f8f6); }
.page-hero-label { font-size:.72rem; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--teal); margin-bottom:.75rem; }
.page-hero-title { font-family:var(--font-serif,'EB Garamond',serif); font-size:clamp(2rem,4vw,3rem); font-weight:500; letter-spacing:-.02em; line-height:1.1; color:var(--color-ink,#1a1916); }
.page-body       { padding:5rem 0; }
.page-body .entry-content p  { font-size:1rem; color:var(--color-ink-mid,#4a4844); line-height:1.8; margin-bottom:1.25rem; }
.page-body .entry-content h2 { font-family:var(--font-serif,'EB Garamond',serif); font-size:1.6rem; font-weight:500; margin:3.5rem 0 1.25rem; }
.page-body .entry-content h3 { font-family:var(--font-serif,'EB Garamond',serif); font-size:1.25rem; font-weight:500; margin:2rem 0 .75rem; }
.page-body .entry-content ul, .page-body .entry-content ol { padding-left:1.5em; margin-bottom:1.25rem; }
.page-body .entry-content li { list-style:disc; font-size:1rem; color:var(--color-ink-mid,#4a4844); line-height:1.7; margin-bottom:.35em; }

/* Badge additions */
.badge-chapter { background:#fdf3e7; color:#b5651d; }

/* Responsive additions */
@media (max-width: 1024px) {
  .identity-grid { grid-template-columns: repeat(2,1fr); }
  .books-grid    { grid-template-columns: repeat(2,1fr); }
  .footer-top    { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 720px) {
  .books-grid  { grid-template-columns: 1fr; }
  .video-grid  { grid-template-columns: 1fr; }
  .identity-grid { grid-template-columns: 1fr; }
  .footer-top  { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: .5rem; text-align: center; }
}