/* ========= CSS RESET & BASE ========= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: #111827;
  background-color: #f3f4f6;
}

/* Color system – minimal corporate */
:root {
  --bg-main: #f3f4f6;
  --bg-elevated: #ffffff;
  --bg-elevated-soft: #f9fafb;

  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-strong: #1d4ed8;

  --text-main: #111827;
  --text-muted: #6b7280;

  --border-subtle: rgba(209, 213, 219, 1);
  --radius-xl: 18px;
  --radius-full: 999px;
  --shadow-soft: 0 14px 30px rgba(15, 23, 42, 0.08);
}

/* Layout helpers */
.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background-color: #f9fafb;
}

.section-title {
  font-size: clamp(1.7rem, 2.4vw, 2.2rem);
  margin: 0 0 0.4rem;
  color: #111827;
}

.section-intro {
  margin: 0.25rem 0 2.5rem;
  color: var(--text-muted);
  max-width: 640px;
  font-size: 0.96rem;
}

/* ========= HEADER / NAV ========= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background-color: rgba(249, 250, 251, 0.98);
  border-bottom: 1px solid #e5e7eb;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.logo-main {
  color: #111827;
}

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

.nav-list {
  display: flex;
  gap: 1.75rem;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-link {
  position: relative;
  font-size: 0.93rem;
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.4rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.nav-link:hover {
  color: #111827;
}

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

/* Nav buttons */
.nav-toggle,
.nav-close {
  border: none;
  background: none;
  color: #111827;
  font-size: 1.2rem;
  display: none;
  cursor: pointer;
}

/* Call to action in nav */
.nav-cta {
  margin-left: 2rem;
}

/* ========= BUTTONS ========= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: var(--accent);
  color: #f9fafb;
  font-weight: 500;
  font-size: 0.93rem;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.18);
  transition: transform 0.12s ease, box-shadow 0.12s ease,
    background 0.12s ease, border-color 0.12s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(37, 99, 235, 0.22);
  background: var(--accent-strong);
}

.btn-outline {
  background: transparent;
  color: #111827;
  border-color: #d1d5db;
  box-shadow: none;
}

.btn-outline:hover {
  background: #e5edff;
  border-color: var(--accent);
}

.btn-ghost {
  background: #ffffff;
  color: #111827;
  border-color: #e5e7eb;
  box-shadow: none;
}

.btn-ghost:hover {
  border-color: var(--accent);
  background: #eff3ff;
}

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

/* ========= HERO ========= */

.hero {
  padding-top: 5.25rem;
  padding-bottom: 4rem;
  background: linear-gradient(
    135deg,
    #f9fafb 0%,
    #eef2ff 35%,
    #f9fafb 100%
  );
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.2fr);
  align-items: center;
  gap: 3.5rem;
}

.hero-text {
  max-width: 560px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.hero-title {
  font-size: clamp(2.1rem, 4vw, 2.8rem);
  margin: 0 0 0.3rem;
  color: #111827;
}

.highlight {
  background: linear-gradient(120deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  margin: 0 0 1rem;
  color: #4b5563;
  font-weight: 500;
}

.hero-body {
  margin: 0 0 1.5rem;
  color: #4b5563;
  font-size: 0.98rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.social-links a {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #e5e7eb;
  color: #6b7280;
  text-decoration: none;
  font-size: 0.9rem;
  transition: border-color 0.12s ease, color 0.12s ease,
    background-color 0.12s ease, transform 0.08s ease;
}

.social-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: #eff6ff;
  transform: translateY(-1px);
}

/* Hero photo */
.hero-photo-wrapper {
  position: relative;
  justify-self: center;
}

.hero-photo-border {
  padding: 0.35rem;
  border-radius: 999px;
  background: radial-gradient(circle at 10% 0, #2563eb, #7c3aed);
}

.hero-photo {
  display: block;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  object-fit: cover;
  background-color: #e5e7eb;
  box-shadow: var(--shadow-soft);
}

/* === BADGE UNDER PHOTO (centered, medium size) === */
.hero-badge {
  position: absolute;
  bottom: -0.7rem;
  left: 50%;
  transform: translateX(-50%);
  background: #ffffff;
  border-radius: 999px;
  padding: 0.45rem 1rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.14);
  max-width: 220px;
  text-align: center;
}

.hero-badge-title {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #9ca3af;
  margin-bottom: 0.08rem;
}

.hero-badge-body {
  font-size: 0.82rem;
  color: #111827;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Hero load animation */
.hero-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

body.page-loaded .hero-reveal {
  opacity: 1;
  transform: translateY(0);
}

body.page-loaded .hero-photo-wrapper {
  transition-delay: 0.12s;
}

/* ========= ABOUT ========= */

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.6fr);
  gap: 3rem;
  align-items: start;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.5rem;
}

.info-item {
  padding: 0.75rem 0.9rem;
  border-radius: 0.9rem;
  border: 1px solid #e5e7eb;
  background: #ffffff;
}

.info-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
  margin-bottom: 0.2rem;
}

.info-value {
  font-size: 0.92rem;
  color: #111827;
  text-decoration: none;
  word-break: break-word;
}

.info-value:hover {
  text-decoration: underline;
}

/* ========= GENERIC REVEAL ========= */

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.reveal-on-scroll.reveal-in {
  opacity: 1;
  transform: translateY(0);
}

/* ========= TIMELINE ========= */

.timeline {
  position: relative;
  margin-top: 1rem;
  padding-left: 1.5rem;
}

/* vertical line */
.timeline::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: 0.55rem;
  width: 2px;
  background: linear-gradient(
    to bottom,
    rgba(37, 99, 235, 0.5),
    rgba(156, 163, 175, 0.1)
  );
}

.timeline-item {
  position: relative;
  display: flex;
  gap: 1.4rem;
  margin-bottom: 1.7rem;

  /* animation initial state */
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.9s ease-out, transform 0.9s ease-out;
}

.timeline-item.in-view {
  opacity: 1;
  transform: translateY(0);
}

.timeline-marker {
  position: relative;
  width: 1.2rem;
  flex-shrink: 0;
}

/* dot */
.timeline-dot {
  position: absolute;
  top: 0.4rem;
  left: 0.1rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  border: 2px solid #ffffff;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.16);
}

.timeline-content {
  padding: 0.8rem 1rem;
  border-radius: 0.9rem;
  border: 1px solid #e5e7eb;
  background: #ffffff;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  margin-bottom: 0.35rem;
}

.timeline-icon {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
  font-size: 0.9rem;
}

.timeline-date {
  margin: 0 0 0.1rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #9ca3af;
}

.timeline-title {
  margin: 0 0 0.05rem;
  font-size: 1rem;
  color: #111827;
}

.timeline-location {
  margin: 0;
  font-size: 0.85rem;
  color: #4b5563;
}

.timeline-body {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: #4b5563;
}

/* ========= CARDS (Interests & Projects) ========= */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 1.4rem 1.4rem 1.2rem;
  border: 1px solid #e5e7eb;
  box-shadow: var(--shadow-soft);
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease,
    border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.12);
  border-color: #d1d5db;
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.card-title {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  color: #111827;
}

.card-body {
  margin: 0;
  font-size: 0.9rem;
  color: #4b5563;
}

/* Project-specific */
.card-project {
  padding-top: 1.6rem;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.75rem;
  border-radius: 999px;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  background: #f3f4ff;
  border: 1px solid #c7d2fe;
  color: #4b5563;
  margin-bottom: 0.5rem;
}

.card-meta {
  margin: 0 0 0.5rem;
  font-size: 0.82rem;
  color: #6b7280;
}

/* ========= SKILLS ========= */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem;
}

.skill {
  margin-bottom: 1rem;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: #111827;
  margin-bottom: 0.35rem;
}

.skill-bar {
  position: relative;
  width: 100%;
  height: 0.45rem;
  border-radius: 999px;
  background: #e5e7eb;
  overflow: hidden;
}

/* animated progress */
.skill-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0; /* start at 0 */
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 1.1s ease-out;
}

.skill-fill.skill-fill-animate {
  width: var(--level);
}

/* ========= CONTACT ========= */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.2fr);
  gap: 2.5rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.3rem 0 0.75rem;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
  color: #111827;
  font-size: 0.93rem;
}

.contact-list i {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #eff6ff;
  border: 1px solid #dbeafe;
  color: var(--accent);
  font-size: 0.85rem;
}

.contact-list a {
  color: inherit;
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}

.contact-note {
  margin-top: 1.2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Contact form */
.contact-form {
  padding: 1.4rem 1.4rem;
  border-radius: var(--radius-xl);
  background: #ffffff;
  border: 1px solid #e5e7eb;
  box-shadow: var(--shadow-soft);
}

.form-field {
  margin-bottom: 1rem;
}

.form-field label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.86rem;
  color: #374151;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 0.75rem;
  border: 1px solid #d1d5db;
  background-color: #ffffff;
  color: #111827;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease,
    background-color 0.12s ease;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: #9ca3af;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.35);
}

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

.site-footer {
  border-top: 1px solid #e5e7eb;
  padding: 1.4rem 0 1.7rem;
  background-color: #f9fafb;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.footer-name {
  margin: 0;
  font-weight: 500;
  color: #111827;
}

.footer-role {
  margin: 0.1rem 0 0;
  font-size: 0.9rem;
  color: #6b7280;
}

.footer-copy {
  margin: 0;
  font-size: 0.82rem;
  color: #9ca3af;
  text-align: right;
}

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

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.4rem;
  }

  .hero-photo-wrapper {
    order: -1;
  }

  .grid-2,
  .skills-grid,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .info-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav-cta {
    display: none;
  }

  .timeline {
    padding-left: 1.2rem;
  }

  .timeline::before {
    left: 0.5rem;
  }

  .timeline-dot {
    left: 0.05rem;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 1.75rem, 100%);
  }

  .section {
    padding: 3.75rem 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: 0;
    background: #f9fafb;
    transform: translateX(100%);
    transition: transform 0.22s ease;
    display: flex;
    flex-direction: column;
    padding: 1.2rem 1rem;
  }

  .nav-open {
    transform: translateX(0);
  }

  .nav-close {
    display: inline-flex;
    align-self: flex-end;
    margin-bottom: 0.5rem;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-top: 1rem;
  }

  .hero {
    padding-top: 4.75rem;
  }

  .hero-title {
    font-size: clamp(1.9rem, 7vw, 2.3rem);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-photo {
    width: 190px;
    height: 190px;
  }

  .footer-copy {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 1.4rem, 100%);
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-photo {
    width: 170px;
    height: 170px;
  }

  .card {
    padding: 1.25rem 1.1rem 1.05rem;
  }

  .contact-form {
    padding: 1.25rem 1.1rem;
  }

  .social-links {
    gap: 0.55rem;
  }
}