/*
Theme Name: Betshrine Rachel
Theme URI: https://betshrinerachel.com
Author: Betshrine Rachel Jibinsingh
Author URI: https://betshrinerachel.com
Description: A distinguished academic portfolio theme for AI researchers, featuring a clean editorial aesthetic with deep navy tones, refined typography, and smooth section transitions. Built for researchers, academics, and professionals to showcase their work with clarity and elegance.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: betshrine-rachel
Tags: portfolio, academic, one-page, research, dark, minimal
*/

/* ============================================================
   CSS VARIABLES & ROOT
   ============================================================ */
:root {
  --color-bg:         #05070f;
  --color-surface:    #0b0f1e;
  --color-surface2:   #111829;
  --color-border:     #1e2840;
  --color-accent:     #3d8bff;
  --color-accent2:    #7fd4c1;
  --color-accent-glow:rgba(61,139,255,0.18);
  --color-text:       #e8eaf2;
  --color-muted:      #7a83a8;
  --color-heading:    #ffffff;
  --color-tag-bg:     #131c32;
  --color-tag-text:   #7fc8ff;

  --font-display:     'Cormorant Garamond', Georgia, serif;
  --font-body:        'DM Sans', 'Helvetica Neue', sans-serif;
  --font-mono:        'JetBrains Mono', 'Courier New', monospace;

  --radius-sm:   4px;
  --radius-md:   10px;
  --radius-lg:   20px;

  --shadow-card: 0 4px 32px rgba(0,0,0,0.45), 0 1px 0 rgba(255,255,255,0.03);
  --shadow-glow: 0 0 40px rgba(61,139,255,0.12);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1120px;
  --section-pad: 100px 0;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}
a:hover { color: var(--color-accent2); }

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  color: var(--color-heading);
  line-height: 1.2;
  font-weight: 600;
}

p { margin-bottom: 1rem; }
ul { list-style: none; }

::selection { background: var(--color-accent); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-block;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-heading);
  margin-bottom: 16px;
  font-weight: 600;
}

.section-subtitle {
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 60px;
}

.tag {
  display: inline-block;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  margin: 3px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: #5aa0ff;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(61,139,255,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
  padding: 0;
}

#site-header.scrolled {
  background: rgba(5, 7, 15, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-muted);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-heading);
  background: var(--color-surface);
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.78rem !important;
  color: var(--color-accent) !important;
  border: 1px solid var(--color-accent) !important;
  padding: 6px 16px !important;
}

.nav-cta:hover {
  background: var(--color-accent) !important;
  color: #fff !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(61,139,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(127,212,193,0.05) 0%, transparent 70%);
  border-radius: 50%;
}

/* Grid dots background */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-accent);
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 1.0;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-name em {
  font-style: italic;
  color: var(--color-accent);
  display: block;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-desc strong { color: var(--color-text); font-weight: 500; }

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-social {
  display: flex;
  gap: 12px;
  align-items: center;
}

.hero-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  transition: all var(--transition);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.hero-social a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-glow);
  transform: translateY(-2px);
}

/* Stats card */
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-border);
  box-shadow: var(--shadow-card);
  min-width: 280px;
}

.stat-item {
  background: var(--color-surface);
  padding: 28px 24px;
  text-align: center;
  transition: background var(--transition);
}

.stat-item:hover { background: var(--color-surface2); }

.stat-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================================
   SCROLL INDICATOR
   ============================================================ */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator::after {
  content: '↓';
  font-size: 1.2rem;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   SECTIONS COMMON
   ============================================================ */
section { padding: var(--section-pad); }

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: 0 32px;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
#about {
  background: var(--color-surface);
  position: relative;
}

#about::before {
  content: '01';
  position: absolute;
  right: 6%;
  top: 10%;
  font-family: var(--font-display);
  font-size: 12rem;
  color: rgba(255,255,255,0.02);
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  color: var(--color-muted);
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 20px;
}

.about-text p strong { color: var(--color-text); font-weight: 500; }

.about-contact {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.contact-item .icon {
  width: 36px;
  height: 36px;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.contact-item a { color: var(--color-text); }
.contact-item a:hover { color: var(--color-accent); }

/* Research interests */
.research-interests {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 8px;
}

.interest-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.interest-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-accent);
  border-radius: 0 2px 2px 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.interest-card:hover {
  border-color: var(--color-accent);
  transform: translateX(4px);
  box-shadow: var(--shadow-glow);
}

.interest-card:hover::before { opacity: 1; }

.interest-icon {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.interest-title {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.interest-desc {
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ============================================================
   EDUCATION SECTION
   ============================================================ */
#education {
  background: var(--color-bg);
}

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--color-accent), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 48px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -44px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 12px var(--color-accent);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.timeline-degree {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.timeline-field {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.timeline-field strong { color: var(--color-text); }

/* ============================================================
   SKILLS SECTION
   ============================================================ */
#skills {
  background: var(--color-surface);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.skill-category {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.skill-category:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.skill-cat-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent2);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* ============================================================
   PUBLICATIONS SECTION
   ============================================================ */
#publications {
  background: var(--color-bg);
}

.publications-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pub-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  transition: all var(--transition);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
}

.pub-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.pub-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: rgba(61,139,255,0.15);
  font-weight: 700;
  line-height: 1;
  min-width: 48px;
  text-align: center;
}

.pub-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 8px;
  line-height: 1.5;
}

.pub-authors {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.pub-journal {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent2);
}

.pub-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
}

/* Under review banner */
.pub-batch {
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 32px;
  text-align: center;
}

.pub-batch-title {
  color: var(--color-muted);
  font-size: 0.9rem;
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

/* ============================================================
   BOOKS SECTION
   ============================================================ */
#books {
  background: var(--color-surface);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.book-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.book-card::after {
  content: '📖';
  position: absolute;
  right: 24px;
  top: 24px;
  font-size: 2rem;
  opacity: 0.15;
}

.book-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.book-number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.book-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  line-height: 1.5;
  margin-bottom: 12px;
}

.book-meta {
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.book-publisher {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-accent2);
}

/* ============================================================
   PATENTS SECTION
   ============================================================ */
#patents {
  background: var(--color-bg);
}

.patents-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.patent-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
  transition: all var(--transition);
}

.patent-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.patent-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(61,139,255,0.15), rgba(127,212,193,0.1));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.patent-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 10px;
  line-height: 1.5;
}

.patent-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.patent-status {
  display: inline-block;
  background: rgba(61,139,255,0.1);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid rgba(61,139,255,0.3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 8px;
}

/* ============================================================
   EXPERIENCE SECTION
   ============================================================ */
#experience {
  background: var(--color-surface);
}

.experience-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.exp-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all var(--transition);
}

.exp-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.exp-role {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.exp-org {
  font-size: 0.9rem;
  color: var(--color-accent2);
  font-weight: 500;
}

.exp-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 4px 12px;
  border-radius: 100px;
  white-space: nowrap;
}

.exp-bullets {
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.exp-bullets li {
  font-size: 0.9rem;
  color: var(--color-muted);
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.exp-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.8rem;
}

/* ============================================================
   MEMBERSHIPS SECTION
   ============================================================ */
#memberships {
  background: var(--color-bg);
}

.memberships-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.membership-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: all var(--transition);
}

.membership-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.membership-abbr {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 4px;
}

.membership-name {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.membership-details {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
  line-height: 1.8;
}

.membership-details strong { color: var(--color-text); }

/* ============================================================
   CONTACT SECTION
   ============================================================ */
#contact {
  background: var(--color-surface);
  text-align: center;
}

.contact-card {
  max-width: 680px;
  margin: 0 auto;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
}

.contact-card .section-title { font-size: 2.5rem; }

.contact-card p {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
  margin-bottom: 32px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  color: var(--color-text);
  font-size: 0.9rem;
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateX(4px);
}

.contact-link-icon {
  font-size: 1.1rem;
  width: 28px;
  text-align: center;
}

.contact-link-label {
  flex: 1;
  font-weight: 500;
}

.contact-link-value {
  font-size: 0.82rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
}

/* ============================================================
   FOOTER
   ============================================================ */
#site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
}

.footer-declaration {
  font-size: 0.78rem;
  color: rgba(122,131,168,0.6);
  font-family: var(--font-mono);
  font-style: italic;
}

/* ============================================================
   ANIMATIONS (fade-in on scroll)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-stats {
    min-width: unset;
    width: 100%;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 72px 0;
  }

  .container { padding: 0 20px; }

  .nav-links {
    display: none;
    position: fixed;
    inset: 70px 0 0;
    background: rgba(5,7,15,0.97);
    flex-direction: column;
    padding: 32px 24px;
    gap: 8px;
    border-top: 1px solid var(--color-border);
  }

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

  .nav-links a {
    padding: 12px 16px;
    font-size: 1rem;
    width: 100%;
  }

  .nav-toggle { display: flex; }

  .pub-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .pub-number { font-size: 1.5rem; }

  .patent-card {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .exp-header { flex-direction: column; }

  .contact-card { padding: 40px 24px; }

  .footer-inner { flex-direction: column; text-align: center; }

  .hero-name { font-size: 3rem; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

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

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

/* ============================================================
   WORDPRESS SPECIFIC
   ============================================================ */
.wp-block-image { margin-bottom: 1rem; }
.alignleft { float: left; margin-right: 24px; }
.alignright { float: right; margin-left: 24px; }
.aligncenter { text-align: center; margin: 0 auto; }

.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 20px;
  z-index: 9999;
  font-size: 0.9rem;
}

.skip-link:focus { top: 0; }