@import url('https://fonts.googleapis.com/css?family=Poppins:400,500,600,700&display=swap');
@import url('font-awesome.min.css');

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

html,
body,
h1,
h2,
h3,
h4,
p,
ul,
figure {
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
}

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

button {
  font: inherit;
  cursor: pointer;
}

/* ---------- Variables ---------- */
:root {
  --accent: #0499e4;
  --accent-dark: #0578ae;
  --accent-soft: #e7f4fd;
  --ink: #1c2530;
  --ink-soft: #5b6472;
  --bg: #ffffff;
  --bg-alt: #f6f9fc;
  --border: #e6ebf2;
  --radius: 14px;
  --shadow: 0 12px 30px rgba(15, 40, 70, 0.08);
  --header-height: 84px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

h1,
h2,
h3,
h4 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

section[id] {
  scroll-margin-top: var(--header-height);
}

.section {
  padding: 60px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: 34px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  transition: all .2s ease;
}

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

.btn-primary:hover {
  background: var(--accent-dark);
}

.btn-outline {
  border-color: var(--border);
  color: var(--ink);
}

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

.btn[disabled] {
  opacity: .6;
  cursor: not-allowed;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  z-index: 1000;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(10px);
  transition: box-shadow .2s ease, background .2s ease;
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(15, 40, 70, .08);
  background: rgba(255, 255, 255, .96);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}

.logo-text {
  font-size: 16px;
  color: var(--ink);
}

.logo-text strong {
  color: var(--accent);
  font-weight: 700;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  transition: right .2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--ink);
}

.nav-link.active::after {
  right: 0;
}

.nav-social {
  display: flex;
  gap: 14px;
}

.nav-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  font-size: 14px;
  transition: all .2s ease;
}

.nav-social a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.lang-btn {
  border: none;
  background: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 5px 11px;
  border-radius: 999px;
  transition: all .2s ease;
}

.lang-btn.active {
  background: var(--accent);
  color: #fff;
}

.mobile-nav .lang-switch {
  align-self: flex-start;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  width: 100%;
  height: 2px;
  background: var(--ink);
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  padding-top: calc(var(--header-height) + 70px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 64px;
  align-items: start;
}

.hero-photo-frame {
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 6px solid #fff;
  outline: 1px solid var(--border);
  aspect-ratio: 1 / 1;
}

.hero-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content h1 {
  font-size: 40px;
  margin-bottom: 20px;
}

.hero-text p {
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 30px 0;
}

.badge-row img {
  width: 74px;
  height: 74px;
}

.badge-row a {
  transition: transform .2s ease;
}

.badge-row a:hover {
  transform: translateY(-4px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.hero-actions .resume-alt {
  font-size: 13px;
  color: var(--ink-soft);
  align-self: center;
}

.hero-actions .resume-alt a {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.skill-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform .2s ease, box-shadow .2s ease;
}

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

.skill-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 18px;
}

.skill-card h3 {
  font-size: 17px;
  margin-bottom: 14px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 13px;
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--border);
}

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

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
}

.timeline-period {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .04em;
  margin-bottom: 6px;
}

.timeline-body h3 {
  font-size: 18px;
}

.timeline-org {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 4px 0 10px;
}

.timeline-body p {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin-bottom: 6px;
}

.timeline-body ul {
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.timeline-body li {
  list-style: disc;
  margin-bottom: 4px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 64px;
  align-items: start;
}

.contact-info p {
  color: var(--ink-soft);
  margin: 18px 0 28px;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.info-item i {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.social-list {
  display: flex;
  gap: 14px;
  margin-top: 26px;
}

.social-list a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  transition: all .2s ease;
}

.social-list a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 14.5px;
  color: var(--ink);
  background: var(--bg-alt);
  transition: border-color .2s ease, background .2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-alert {
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 14px;
  margin-bottom: 20px;
}

.form-alert.success {
  background: #e9f9ef;
  color: #1c7a3f;
  border: 1px solid #bfead0;
}

.form-alert.error {
  background: #fdecec;
  color: #b3261e;
  border: 1px solid #f6c4c1;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 30px 0;
  border-top: 1px solid var(--border);
}

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

.footer-inner p {
  color: var(--ink-soft);
  font-size: 14px;
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all .25s ease;
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}

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

/* ---------- Mobile menu ---------- */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  z-index: 999;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  gap: 30px;
  transform: translateX(100%);
  transition: transform .25s ease;
  overflow-y: auto;
}

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

.mobile-nav .nav-links {
  flex-direction: column;
  gap: 22px;
}

.mobile-nav .nav-links a {
  font-size: 20px;
}

.mobile-nav .nav-social {
  margin-top: 10px;
}

/* ---------- 404 ---------- */
.notfound-section {
  min-height: 100vh;
  padding-top: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.notfound-code {
  font-size: 130px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.notfound-section h1 {
  font-size: 28px;
  margin-bottom: 14px;
}

.notfound-section p {
  color: var(--ink-soft);
  max-width: 460px;
  margin: 0 auto 32px;
}

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .main-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 220px 1fr;
    gap: 40px;
  }

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

  .two-col {
    grid-template-columns: 1fr;
    gap: 50px;
  }

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

@media (max-width: 640px) {
  .section {
    padding: 80px 0;
  }

  .hero {
    padding-top: calc(var(--header-height) + 40px);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-photo-frame {
    width: 180px;
    margin: 0 auto;
  }

  .badge-row,
  .hero-actions {
    justify-content: center;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 26px;
  }

  .section-head h2 {
    font-size: 27px;
  }

  .notfound-code {
    font-size: 90px;
  }
}