/* ===== CSS VARIABLES ===== */
:root {
  --clr-primary: #6366f1;
  --clr-accent: #10b981;
  --clr-earthquake: #f59e0b;
  --clr-dark: #1a1a2e;
  --clr-dark-mid: #16213e;
  --clr-text: #4b5563;
  --clr-text-light: #6b7280;
  --clr-bg-light: #f8f9fa;
  --clr-white: #ffffff;
  --clr-border: #e8e8ee;
  --font-display: 'Playfair Display', serif;
  --font-body: 'Outfit', sans-serif;
  --radius-card: 1.4rem;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.05);
  --shadow-card-hover: 0 14px 44px rgba(99, 102, 241, 0.15);
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--clr-text);
  background: var(--clr-white);
  overflow-x: hidden;
}

p {
  color: var(--clr-text);
}

a {
  color: var(--clr-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--clr-primary);
}

/* ===== DESKTOP NAV ===== */
#desktop-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 4rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition), padding var(--transition);
}

#desktop-nav.scrolled {
  padding: 0.9rem 4rem;
  border-color: var(--clr-border);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--clr-dark);
  cursor: default;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-dark);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--clr-primary);
  text-decoration: none;
}

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

/* ===== HAMBURGER NAV ===== */
#hamburger-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--clr-border);
}

.hamburger-menu {
  position: relative;
  display: inline-block;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 22px;
  width: 28px;
  cursor: pointer;
}

.hamburger-icon span {
  width: 100%;
  height: 2px;
  background: var(--clr-dark);
  border-radius: 2px;
  transition: all 0.3s ease-in-out;
}

.menu-links {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  background: var(--clr-white);
  border-radius: 1rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--clr-border);
  width: 200px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
  list-style: none;
}

.menu-links.open {
  max-height: 300px;
  opacity: 1;
}

.menu-links li a {
  display: block;
  padding: 0.75rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-dark);
  transition: background var(--transition), color var(--transition);
}

.menu-links li a:hover {
  background: #f0f0ff;
  color: var(--clr-primary);
}

.hamburger-icon.open span:first-child {
  transform: rotate(45deg) translate(7px, 5px);
}
.hamburger-icon.open span:nth-child(2) {
  opacity: 0;
}
.hamburger-icon.open span:last-child {
  transform: rotate(-45deg) translate(7px, -5px);
}

/* ===== SECTIONS BASE ===== */
section {
  padding: 6rem 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* ===== SHARED HEADING STYLES ===== */
.section__text__p1 {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-primary);
  text-align: center;
  margin-bottom: 0.4rem;
}

.title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--clr-dark);
  text-align: center;
  margin-bottom: 0.6rem;
  position: relative;
}

.title::after {
  content: '';
  display: block;
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  margin: 0.7rem auto 0;
  border-radius: 2px;
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===== PROFILE SECTION ===== */
#profile {
  padding-top: 7rem;
  min-height: 100vh;
  flex-direction: row;
  justify-content: center;
  gap: 5rem;
  background: var(--clr-white);
  position: relative;
  overflow: hidden;
}

/* Decorative blob behind profile */
#profile::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.section__pic-container {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.section__pic-container img {
  width: 320px;
  height: 320px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--clr-border);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.12);
  transition: transform var(--transition), box-shadow var(--transition);
}

.section__pic-container img:hover {
  transform: scale(1.03);
  box-shadow: 0 18px 50px rgba(99, 102, 241, 0.2);
}

.section__text {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#profile .section__text__p1 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

#profile .title {
  font-size: 3.2rem;
  margin-bottom: 0.4rem;
}

#profile .title::after {
  display: none;
}

.section__text__p2 {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--clr-text-light);
  margin-bottom: 1.8rem;
  letter-spacing: 0.05em;
}

/* ===== BUTTONS ===== */
.btn-container {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.8rem;
}

.btn {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.8rem 1.8rem;
  border-radius: 3rem;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.03em;
}

.btn-color-1 {
  background: var(--clr-dark);
  color: var(--clr-white);
  border: 2px solid var(--clr-dark);
}

.btn-color-1:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
  transform: translateY(-2px);
}

.btn-color-2 {
  background: transparent;
  color: var(--clr-dark);
  border: 2px solid var(--clr-dark);
}

.btn-color-2:hover {
  background: var(--clr-dark);
  color: var(--clr-white);
  box-shadow: 0 6px 20px rgba(26, 26, 46, 0.25);
  transform: translateY(-2px);
}

/* ===== SOCIALS ===== */
#socials-container {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
}

#socials-container .icon {
  width: 38px;
  height: 38px;
  padding: 8px;
  border-radius: 50%;
  background: var(--clr-bg-light);
  border: 1px solid var(--clr-border);
  cursor: pointer;
  transition: all var(--transition);
  filter: grayscale(1) brightness(0.5);
}

#socials-container .icon:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  filter: grayscale(0) brightness(10);
  transform: translateY(-3px);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

/* ===== ABOUT SECTION ===== */
#about {
  background: var(--clr-bg-light);
  position: relative;
  overflow: hidden;
}

#about::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#about::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.section-container {
  width: 100%;
  max-width: 820px;
  position: relative;
  z-index: 1;
  margin-top: 1.5rem;
}

.about-details-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.about-containers {
  display: flex;
  gap: 1.8rem;
  width: 100%;
  margin-bottom: 1.8rem;
}

/* About cards (Experience + Education) */
#about .details-container {
  flex: 1;
  background: var(--clr-white);
  border-radius: var(--radius-card);
  padding: 2rem 1.5rem;
  text-align: center;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

#about .details-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--clr-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

#about .details-container:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

#about .details-container:hover::before {
  opacity: 1;
}

#about .details-container .icon {
  width: 46px;
  height: 46px;
  margin-bottom: 0.8rem;
  filter: grayscale(1) brightness(0.6);
  transition: filter var(--transition);
}

#about .details-container:hover .icon {
  filter: sepia(1) saturate(3) hue-rotate(200deg) brightness(0.9);
}

#about .details-container h3 {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--clr-dark);
  margin-bottom: 0.4rem;
}

#about .details-container p {
  font-size: 0.88rem;
  color: var(--clr-text-light);
  line-height: 1.6;
}

/* Bio text card */
.text-container {
  background: var(--clr-white);
  border-radius: var(--radius-card);
  padding: 2rem 2.4rem;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-card);
  width: 100%;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.text-container:hover {
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.08);
}

.text-container::before {
  content: '\201C';
  position: absolute;
  top: 0.2rem;
  left: 1.2rem;
  font-family: var(--font-display);
  font-size: 5rem;
  color: var(--clr-primary);
  opacity: 0.1;
  line-height: 1;
  pointer-events: none;
}

.text-container p {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--clr-text);
  position: relative;
  z-index: 1;
}

/* Arrow shared */
.arrow {
  position: absolute;
  right: 2rem;
  bottom: 2rem;
  width: 28px;
  height: 28px;
  opacity: 0.3;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 1;
}

.arrow:hover {
  opacity: 0.7;
  transform: translateY(5px);
}

/* ===== EXPERIENCE SECTION ===== */
#experience {
  background: var(--clr-white);
  position: relative;
  overflow: hidden;
}

#experience::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -140px;
  transform: translateY(-50%);
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#experience::after {
  content: '';
  position: absolute;
  bottom: -70px;
  right: -70px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.experience-details-container {
  width: 100%;
  max-width: 1180px;
  position: relative;
  z-index: 1;
  margin-top: 2rem;
}

.experience-details-container .about-containers {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  justify-content: center;
  margin-bottom: 0;
}

/* Experience cards */
.experience-details-container .details-container {
  flex: 1 1 280px;
  max-width: 340px;
  background: var(--clr-white);
  border-radius: var(--radius-card);
  padding: 1.8rem 1.5rem;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.experience-details-container .details-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.experience-details-container .details-container:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.experience-details-container .details-container:hover::before {
  opacity: 1;
}

/* Card heading */
.experience-sub-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--clr-dark);
  text-align: center;
  margin-bottom: 1.2rem;
  padding-bottom: 0.85rem;
  position: relative;
}

.experience-sub-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  border-radius: 2px;
}

/* Skill rows */
.article-container {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.experience-details-container article {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.65rem 0.85rem;
  border-radius: 0.7rem;
  background: var(--clr-bg-light);
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), transform 0.2s ease;
}

.experience-details-container article:hover {
  background: #eef0ff;
  border-color: #c7c9ff;
  transform: translateX(5px);
}

.experience-details-container article .icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  filter: grayscale(1) brightness(0.5);
  transition: filter var(--transition);
  cursor: default;
}

.experience-details-container article:hover .icon {
  filter: sepia(1) saturate(4) hue-rotate(200deg) brightness(0.85);
}

.experience-details-container article div h3 {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-dark);
  margin: 0;
  line-height: 1.3;
}

.experience-details-container article div p {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--clr-text-light);
  margin: 0.15rem 0 0;
  line-height: 1;
}

/* ===== CURRENT RESEARCH SECTION ===== */
#research {
  background: var(--clr-bg-light);
  position: relative;
  overflow: hidden;
}

#research::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#research::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.research-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--clr-text-light);
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.research-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
  gap: 2.5rem;
  max-width: 1200px;
  width: 100%;
  position: relative;
  z-index: 1;
  margin-bottom: 2rem;
}

.research-card {
  background: var(--clr-white);
  border-radius: var(--radius-card);
  padding: 2.5rem 2.2rem;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.research-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

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

.research-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.research-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(99, 102, 241, 0.05) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.research-icon-wrapper.earthquake {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.research-card:hover .research-icon-wrapper {
  transform: scale(1.08);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0.08) 100%);
}

.research-card:hover .research-icon-wrapper.earthquake {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(245, 158, 11, 0.08) 100%);
}

.research-icon {
  width: 28px;
  height: 28px;
  color: var(--clr-primary);
  stroke-width: 2;
}

.research-icon-wrapper.earthquake .research-icon {
  color: var(--clr-earthquake);
}

.research-status {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-white);
  background: var(--clr-accent);
  padding: 0.45rem 1rem;
  border-radius: 2rem;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}

.research-status.earthquake {
  background: var(--clr-earthquake);
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.25);
}

.research-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-dark);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.research-description {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--clr-text);
  margin-bottom: 1.8rem;
}

.research-objectives {
  margin-bottom: 1.8rem;
}

.research-objectives h3 {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.9rem;
}

.research-objectives ul {
  list-style: none;
  padding: 0;
}

.research-objectives li {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--clr-text);
  padding-left: 1.5rem;
  margin-bottom: 0.6rem;
  position: relative;
}

.research-objectives li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--clr-primary);
  font-weight: 600;
}

.research-tech-stack {
  margin-bottom: 1.8rem;
}

.research-tech-stack h3 {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.9rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tech-tag {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--clr-primary);
  background: rgba(99, 102, 241, 0.08);
  padding: 0.45rem 0.9rem;
  border-radius: 0.6rem;
  border: 1px solid rgba(99, 102, 241, 0.15);
  transition: all var(--transition);
}

.tech-tag:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-2px);
}

.research-progress {
  background: var(--clr-bg-light);
  padding: 1.2rem 1.4rem;
  border-radius: 0.9rem;
  border: 1px solid var(--clr-border);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-dark);
}

.progress-percentage {
  color: var(--clr-primary);
  font-size: 0.9rem;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 1rem;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  border-radius: 1rem;
  transition: width 1s ease;
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

.progress-fill.earthquake {
  background: linear-gradient(90deg, var(--clr-earthquake), #fbbf24);
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* ===== PROJECTS SECTION ===== */
#projects {
  background: var(--clr-white);
  position: relative;
  overflow: hidden;
}

#projects::before {
  content: '';
  position: absolute;
  top: -120px;
  left: -120px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#projects::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.projects-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 1180px;
  width: 100%;
  margin-top: 2.5rem;
  position: relative;
  z-index: 1;
}

.project-card {
  background: var(--clr-white);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.project-img-container {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-img {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(26, 26, 46, 0.7) 100%);
  display: flex;
  align-items: flex-end;
  padding: 1.2rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-tag {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-white);
  background: rgba(99, 102, 241, 0.85);
  padding: 0.4rem 0.9rem;
  border-radius: 2rem;
  backdrop-filter: blur(8px);
}

.project-content {
  padding: 1.8rem 1.6rem 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--clr-dark);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.project-description {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--clr-text);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}

.tech-badge {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--clr-primary);
  background: rgba(99, 102, 241, 0.08);
  padding: 0.35rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(99, 102, 241, 0.15);
  transition: all var(--transition);
}

.tech-badge:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
}

.project-card .btn-container {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0;
}

.btn-project {
  flex: 1;
  background: var(--clr-primary);
  color: var(--clr-white);
  border: 2px solid var(--clr-primary);
  font-size: 0.85rem;
  padding: 0.7rem 1.4rem;
  font-weight: 600;
}

.btn-project:hover {
  background: var(--clr-dark);
  border-color: var(--clr-dark);
  box-shadow: 0 6px 20px rgba(26, 26, 46, 0.25);
}

.btn-project-outline {
  flex: 1;
  background: transparent;
  color: var(--clr-dark);
  border: 2px solid var(--clr-border);
  font-size: 0.85rem;
  padding: 0.7rem 1.4rem;
  font-weight: 600;
}

.btn-project-outline:hover {
  background: var(--clr-dark);
  color: var(--clr-white);
  border-color: var(--clr-dark);
  box-shadow: 0 6px 20px rgba(26, 26, 46, 0.2);
}

/* ===== CONTACT SECTION ===== */
#contact {
  background: var(--clr-bg-light);
  position: relative;
  overflow: hidden;
  min-height: 80vh;
}

#contact::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.contact-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--clr-text-light);
  text-align: center;
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 1;
}

.contact-container {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 900px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.contact-card {
  flex: 1;
  min-width: 240px;
  max-width: 280px;
  background: var(--clr-white);
  border-radius: var(--radius-card);
  padding: 2.2rem 1.8rem;
  text-align: center;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.contact-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(99, 102, 241, 0.2);
}

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

.contact-icon-wrapper {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.2rem;
  background: var(--clr-bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--clr-border);
  transition: all var(--transition);
}

.contact-card:hover .contact-icon-wrapper {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  transform: scale(1.05);
}

.contact-icon {
  width: 32px;
  height: 32px;
  filter: grayscale(1) brightness(0.5);
  transition: filter var(--transition);
}

.contact-card:hover .contact-icon {
  filter: brightness(10);
}

.contact-card h3 {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--clr-dark);
  margin-bottom: 0.6rem;
}

.contact-card a {
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--clr-text);
  text-decoration: none;
  transition: color var(--transition);
  display: inline-block;
}

.contact-card a:hover {
  color: var(--clr-primary);
}

/* ===== FOOTER ===== */
footer {
  background: var(--clr-dark);
  padding: 2rem;
  text-align: center;
}

footer p {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  #desktop-nav {
    padding: 1.2rem 2rem;
  }

  #profile {
    gap: 3rem;
  }

  .section__pic-container img {
    width: 260px;
    height: 260px;
  }

  .research-container {
    grid-template-columns: 1fr;
  }

  .projects-container {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  #desktop-nav {
    display: none;
  }

  #hamburger-nav {
    display: flex;
  }

  #profile {
    flex-direction: column;
    gap: 2rem;
    padding-top: 8rem;
  }

  .section__pic-container img {
    width: 220px;
    height: 220px;
  }

  #profile .title {
    font-size: 2.4rem;
  }

  .title {
    font-size: 2.2rem;
  }

  .about-containers {
    flex-direction: column;
    gap: 1rem;
  }

  .section-container {
    max-width: 100%;
  }

  .experience-details-container .details-container {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .research-container {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }

  section {
    padding: 5rem 1.2rem;
  }

  .projects-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .contact-container {
    flex-direction: column;
    align-items: center;
  }

  .contact-card {
    max-width: 100%;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.3rem;
  }

  #profile .title {
    font-size: 2rem;
  }

  .title {
    font-size: 1.9rem;
  }

  .btn {
    padding: 0.7rem 1.3rem;
    font-size: 0.82rem;
  }

  .text-container {
    padding: 1.6rem 1.4rem;
  }

  .research-container {
    grid-template-columns: 1fr;
  }

  .research-card {
    padding: 2rem 1.5rem;
  }

  .project-card .btn-container {
    flex-direction: column;
  }

  .btn-project,
  .btn-project-outline {
    width: 100%;
  }
}