/* ============================================
   Veronika Jančeková — Personal Website
   Modern, sleek design for supply chain professional
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f1f5f9;
  --color-dark: #0f172a;
  --color-dark-mid: #1e293b;
  --color-primary: #0284c7;
  --color-primary-light: #38bdf8;
  --color-primary-dark: #0369a1;
  --color-accent: #06b6d4;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-text-lighter: #94a3b8;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.7;
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition);
}

.nav-scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  padding: 12px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--color-primary-light);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-white);
}

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

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

.nav-toggle-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle-active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(56, 189, 248, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.3) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(2, 132, 199, 0.3) 0%, transparent 40%);
}

.hero-pattern::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2338bdf8' fill-opacity='0.15'%3E%3Ccircle cx='30' cy='30' r='1.5'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-greeting {
  color: var(--color-primary-light);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero-role {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-primary-light);
  margin-bottom: 8px;
}

.hero-tagline {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
}

.hero-location {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.hero-location svg {
  flex-shrink: 0;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(2, 132, 199, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: var(--color-white);
  color: var(--color-white);
  transform: translateY(-2px);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid rgba(255,255,255,0.15);
  box-shadow: 0 25px 50px rgba(0,0,0,0.3);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, transparent 60%);
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero-scroll a {
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
  animation: float 2s ease-in-out infinite;
}

.hero-scroll a:hover {
  color: rgba(255,255,255,0.8);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* --- Sections --- */
.section {
  padding: 100px 0;
}

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

.section-dark {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--color-white);
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 48px;
  letter-spacing: -0.02em;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  margin-top: 16px;
}

.section-title-light {
  color: var(--color-white);
}

/* --- About --- */
.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text {
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--color-text);
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.stat {
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-light);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Timeline --- */
.timeline {
  max-width: 800px;
}

.timeline-company {
  margin-bottom: 48px;
}

.timeline-company:last-child {
  margin-bottom: 0;
}

.timeline-company-header {
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-company-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-dark);
}

.timeline-company-meta {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.timeline-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  position: relative;
}

.timeline-item:not(:last-child) {
  border-left: 2px solid var(--color-border);
  margin-left: 7px;
  padding-left: 28px;
  padding-bottom: 32px;
}

.timeline-item:last-child {
  border-left: 2px solid transparent;
  margin-left: 7px;
  padding-left: 28px;
}

.timeline-marker {
  position: absolute;
  left: 0;
  top: 24px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg-alt);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.timeline-date {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Education --- */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.edu-card {
  background: var(--color-white);
  padding: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.edu-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.edu-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  margin-bottom: 20px;
}

.edu-school {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.edu-degree {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.edu-field {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* --- Skills --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.skill-group {
  background: var(--color-white);
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.skill-group:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.skill-category {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

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

.skill-tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 50px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.skill-tag:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.subsection-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 20px;
}

.languages-grid {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.language-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 32px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  min-width: 200px;
}

.language-name {
  font-weight: 700;
  color: var(--color-dark);
  font-size: 1rem;
}

.language-level {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* --- Volunteering --- */
.volunteer-grid {
  max-width: 480px;
}

.volunteer-card {
  background: var(--color-bg-alt);
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.volunteer-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.volunteer-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #f472b6, #ec4899);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  margin-bottom: 20px;
}

.volunteer-role {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.volunteer-org {
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.volunteer-meta {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.volunteer-location {
  font-size: 0.85rem;
  color: var(--color-text-lighter);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-text {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
  line-height: 1.8;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-input {
  padding: 12px 16px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition);
  outline: none;
}

.form-input::placeholder {
  color: rgba(255,255,255,0.3);
}

.form-input:focus {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.1);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  align-self: flex-start;
}

.contact-aside {
  padding-top: 8px;
}

.contact-aside-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50px;
  color: var(--color-white);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition);
  width: fit-content;
}

.contact-link:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.3);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* --- Footer --- */
.footer {
  padding: 24px 0;
  background: #0a1120;
  text-align: center;
}

.footer p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-text {
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

  .hero-name {
    font-size: 2.75rem;
  }

  .hero-location {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-image-wrapper {
    width: 260px;
    height: 260px;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .about-stats {
    flex-direction: row;
    justify-content: center;
  }

  .stat {
    flex: 1;
    min-width: 120px;
  }

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

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    text-align: center;
  }

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

  .nav-toggle {
    display: flex;
  }

  .hero-name {
    font-size: 2.25rem;
  }

  .hero-role {
    font-size: 1.1rem;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 1.75rem;
    margin-bottom: 32px;
  }

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

  .about-stats {
    flex-direction: column;
  }

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

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

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

  .languages-grid {
    flex-direction: column;
  }

  .language-item {
    min-width: auto;
  }
}