/* ============================================
   CSS Variables
   ============================================ */
:root {
  --ok-green: #41D97B;
  --ok-dark: #1E2326;
  --ok-navy: #333549;
  --bg: #F3F4F6;
  --panel: #FFFFFF;
  --border: #E1E4E8;
  --text: #0F172A;
  --muted: #475569;
  --muted-light: #64748B;
  --shadow: 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-subtle: 0 1px 3px rgba(15, 23, 42, .04);
  --shadow-medium: 0 4px 12px rgba(15, 23, 42, .08);
  --r8: 8px;
  --r12: 12px;
  --r16: 16px;
  --r20: 20px;
  --r24: 24px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 80px;
}

/* ============================================
   Base Styles
   ============================================ */
html, body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: geometricPrecision;
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 18px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--ok-green);
}

/* ============================================
   Layout
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--ok-dark);
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
  border-radius: var(--r8);
}

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

/* ============================================
   Header & Navigation
   ============================================ */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 244, 246, .95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.mark {
  width: 44px;
  height: 44px;
  border-radius: var(--r12);
  border: 2px solid var(--ok-green);
  display: grid;
  place-items: center;
  background: #fff;
  font-weight: 900;
  letter-spacing: .2px;
  font-size: 16px;
  flex-shrink: 0;
}

.brand-title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-title b {
  font-size: 16px;
  letter-spacing: .2px;
  font-weight: 700;
}

.brand-title span {
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}

nav ul {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  padding: 0;
  margin: 0;
  align-items: center;
}

nav a {
  font-size: 15px;
  color: #111827;
  padding: 10px 14px;
  border-radius: var(--r12);
  border: 1px solid transparent;
  transition: all 0.2s ease;
  font-weight: 500;
}

nav a:hover {
  border-color: var(--border);
  background: #fff;
  color: var(--ok-green);
}

nav a:focus-visible {
  outline: 2px solid var(--ok-green);
  outline-offset: 2px;
}

.cta-mail {
  font-size: 15px;
  padding: 10px 16px;
  border-radius: var(--r12);
  border: 1px solid rgba(65, 217, 123, .35);
  background: rgba(65, 217, 123, .08);
  color: #0b1220;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.cta-mail:hover {
  border-color: rgba(65, 217, 123, .5);
  background: rgba(65, 217, 123, .12);
  color: var(--ok-green);
}

.cta-mail:focus-visible {
  outline: 2px solid var(--ok-green);
  outline-offset: 2px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(180deg, var(--ok-dark), #15181b);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

h1 {
  margin: 0;
  font-size: clamp(48px, 5vw, 72px);
  line-height: 1.1;
  letter-spacing: -.03em;
  font-weight: 800;
}

.hero-subtitle {
  margin: 0;
  font-size: clamp(20px, 2vw, 28px);
  color: rgba(255, 255, 255, .75);
  font-weight: 500;
  letter-spacing: -.01em;
}

.lead {
  margin: 0;
  color: rgba(255, 255, 255, .85);
  font-size: clamp(18px, 1.5vw, 22px);
  max-width: 65ch;
  line-height: 1.7;
}

.hero-tagline {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r12);
  width: fit-content;
  font-size: 15px;
  color: rgba(255, 255, 255, .9);
}

.tagline-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok-green);
  flex-shrink: 0;
}

.hero-contacts {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, .1);
}

.contacts-title {
  margin: 0 0 var(--spacing-md);
  font-size: 18px;
  font-weight: 600;
  color: rgba(255, 255, 255, .9);
}

.contacts-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  color: rgba(255, 255, 255, .8);
  font-size: 15px;
  transition: color 0.2s ease;
  align-items: baseline;
}

.contact-item:hover {
  color: var(--ok-green);
}

.contact-label {
  font-weight: 500;
  min-width: 80px;
  color: rgba(255, 255, 255, .7);
}

.contact-value {
  color: rgba(255, 255, 255, .9);
  word-break: break-all;
}

/* ============================================
   Profile Component
   ============================================ */
.profile {
  display: flex;
  justify-content: center;
  align-items: start;
}

.avatar {
  width: 280px;
  height: 280px;
  border-radius: var(--r24);
  border: 2px solid rgba(255, 255, 255, .15);
  overflow: hidden;
  background: rgba(255, 255, 255, .06);
  box-shadow: var(--shadow-medium);
  position: relative;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, .1);
  color: rgba(255, 255, 255, .8);
  font-size: 64px;
  font-weight: 700;
}

/* ============================================
   Sections
   ============================================ */
section {
  padding: var(--spacing-4xl) 0;
}

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

.section-dark {
  background: linear-gradient(180deg, var(--ok-dark), #15181b);
  color: #fff;
}

.section-title {
  margin: 0 0 var(--spacing-md);
  font-size: clamp(36px, 4vw, 52px);
  letter-spacing: -.02em;
  line-height: 1.2;
  font-weight: 700;
}

.section-dark .section-title {
  color: #fff;
}

.accent-dot {
  color: var(--ok-green);
}

.section-sub {
  margin: 0 0 var(--spacing-xl);
  color: var(--muted);
  font-size: 20px;
  max-width: 80ch;
  line-height: 1.6;
  font-weight: 500;
}

.section-dark .section-sub {
  color: rgba(255, 255, 255, .75);
}

/* ============================================
   Panel Component
   ============================================ */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r24);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-top: 0;
}

.section-dark .panel {
  background: rgba(255, 255, 255, .06);
  border-color: rgba(255, 255, 255, .12);
}

.panel-pad {
  padding: var(--spacing-xl);
}

.panel-text {
  margin: 0 0 var(--spacing-lg);
  font-size: 19px;
  line-height: 1.75;
}

.panel-text:last-child {
  margin-bottom: 0;
}

.panel-text-primary {
  color: var(--text);
}

.section-dark .panel-text-primary {
  color: rgba(255, 255, 255, .9);
}

.panel-text-muted {
  color: var(--muted);
}

.section-dark .panel-text-muted {
  color: rgba(255, 255, 255, .75);
}

/* ============================================
   Contacts Block
   ============================================ */
.contacts-block {
  margin-top: var(--spacing-xl);
}

.contacts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.contact-card {
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
  padding: var(--spacing-lg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r16);
  box-shadow: var(--shadow);
  transition: all 0.2s ease;
  text-decoration: none;
  color: inherit;
}

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
  border-color: var(--ok-green);
}

.contact-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(65, 217, 123, .08);
  border: 1px solid rgba(65, 217, 123, .2);
  border-radius: var(--r8);
  color: var(--ok-green);
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.contact-info {
  flex: 1;
  min-width: 0;
}

.contact-card .contact-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.contact-card .contact-value {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  word-break: break-all;
  line-height: 1.5;
}

.contact-card:hover .contact-value {
  color: var(--ok-green);
}

/* ============================================
   Competencies
   ============================================ */
.competencies {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.competency-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
  padding: var(--spacing-lg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r16);
  box-shadow: var(--shadow-subtle);
}

.competency-icon {
  color: var(--ok-green);
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.competency-item p {
  margin: 0;
  font-size: 18px;
  line-height: 1.75;
  color: var(--text);
}

.section-dark .competency-item {
  background: rgba(255, 255, 255, .06);
  border-color: rgba(255, 255, 255, .12);
}

.section-dark .competency-item p {
  color: rgba(255, 255, 255, .85);
}

.section-dark .competency-icon {
  color: var(--ok-green);
}

/* ============================================
   Practice Section
   ============================================ */
.practice-details {
  margin-top: var(--spacing-2xl);
}

.practice-subtitle {
  margin: 0 0 var(--spacing-lg);
  font-size: 24px;
  font-weight: 600;
  color: #fff;
}

.practice-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.practice-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r16);
}

.practice-icon {
  color: var(--ok-green);
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.practice-item p {
  margin: 0;
  font-size: 18px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .85);
}

/* ============================================
   Projects Grid
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.project-card {
  padding: var(--spacing-xl);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r20);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.project-title {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

.project-description {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
  flex-grow: 1;
}

.project-link {
  margin-top: var(--spacing-sm);
  font-size: 15px;
  color: var(--ok-green);
  font-weight: 500;
  word-break: break-all;
  transition: color 0.2s ease;
}

.project-link:hover {
  color: #2fc865;
}

/* ============================================
   Experience Timeline
   ============================================ */
.experience-timeline {
  margin-top: var(--spacing-2xl);
}

.experience-subtitle {
  margin: 0 0 var(--spacing-xl);
  font-size: 24px;
  font-weight: 600;
  color: #fff;
}

.timeline-item {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

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

.timeline-marker {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ok-green);
  border: 3px solid var(--ok-dark);
  flex-shrink: 0;
  margin-top: 6px;
  position: relative;
  z-index: 1;
}

.timeline-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 5.5px;
  top: 24px;
  width: 2px;
  height: calc(100% + var(--spacing-2xl));
  background: rgba(255, 255, 255, .1);
}

.timeline-content {
  flex: 1;
  padding-left: var(--spacing-sm);
}

.timeline-company {
  margin: 0 0 var(--spacing-sm);
  font-size: 22px;
  font-weight: 600;
  color: #fff;
}

.timeline-description {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .8);
}

/* ============================================
   Skills Grid
   ============================================ */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.skill-tag {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--r8);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow-subtle);
  font-weight: 500;
  font-size: 15px;
  color: var(--text);
  transition: all 0.2s ease;
}

.skill-tag:hover {
  border-color: var(--ok-green);
  background: rgba(65, 217, 123, .08);
  color: var(--ok-green);
  transform: translateY(-1px);
}

/* ============================================
   Footer
   ============================================ */
footer {
  padding: var(--spacing-4xl) 0;
  background: var(--ok-dark);
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, .06);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
  text-align: center;
}

.footer-title {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  color: rgba(255, 255, 255, .9);
}

.footer-links {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
  justify-content: center;
}

.footer-separator {
  color: rgba(255, 255, 255, .4);
  font-size: 14px;
}

.footer-link {
  font-size: 15px;
  color: rgba(255, 255, 255, .75);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--ok-green);
}

.footer-contact {
  margin: var(--spacing-md) 0 0;
  font-size: 18px;
  font-weight: 600;
}

.footer-contact a {
  color: rgba(255, 255, 255, .9);
  transition: color 0.2s ease;
}

.footer-contact a:hover {
  color: var(--ok-green);
}

/* ============================================
   Animations
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   Focus States (Global)
   ============================================ */
*:focus-visible {
  outline: 2px solid var(--ok-green);
  outline-offset: 2px;
  border-radius: var(--r8);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .avatar {
    width: 240px;
    height: 240px;
    margin: 0 auto;
  }

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

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 64px;
    --spacing-3xl: 48px;
  }

  .container {
    padding: 0 20px;
  }

  .nav {
    flex-wrap: wrap;
  }

  nav ul {
    order: 3;
    width: 100%;
    justify-content: center;
    margin-top: var(--spacing-sm);
  }

  .hero {
    padding: var(--spacing-3xl) 0;
  }

  .avatar {
    width: 200px;
    height: 200px;
  }

  .contacts-list {
    gap: var(--spacing-xs);
  }

  .contact-item {
    flex-direction: column;
    gap: 4px;
  }

  .contact-label {
    min-width: auto;
  }

  section {
    padding: var(--spacing-3xl) 0;
  }

  .competency-item,
  .practice-item {
    padding: var(--spacing-md);
  }

  .project-card {
    padding: var(--spacing-lg);
  }

  .timeline-item {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .timeline-item:not(:last-child)::after {
    display: none;
  }

  .timeline-content {
    padding-left: 0;
  }
}

@media (max-width: 520px) {
  nav ul {
    display: none;
  }

  .brand-title span {
    display: none;
  }

  .hero-tagline {
    flex-wrap: wrap;
  }
}