/* ==========================================================================
   ALEXANDROS KAPACHATZIS — DARK EDITORIAL STYLESHEET
   ========================================================================== */

/* 1. DESIGN TOKENS (:root) */
:root {
  /* --- COLOR PALETTE --- */
  --bg-primary: #0A0A0B;            /* Deep obsidian / near-black */
  --bg-surface: #121214;            /* Subtle section contrast */
  --bg-surface-elevated: #18181B;   /* Interactive dark surface */

  --text-primary: #F3F3F4;          /* Bone / crisp off-white */
  --text-secondary: #A1A1AA;        /* Muted slate-gray */
  --text-tertiary: #52525B;         /* Subtle labels & captions */

  --color-accent: #C5A059;          /* Muted Antique Brass / Warm Gold */
  --color-accent-hover: #D8B46E;

  /* Hairlines & Borders */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-strong: rgba(255, 255, 255, 0.22);
  --border-color-accent: var(--color-accent);

  /* --- FONT STACKS --- */
  --font-heading: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* --- TYPOGRAPHIC SCALE (Fluid) --- */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);     /* 12 - 13px */
  --text-sm: clamp(0.85rem, 0.8rem + 0.25vw, 0.9375rem);     /* 13.5 - 15px */
  --text-base: clamp(0.95rem, 0.9rem + 0.35vw, 1.0625rem);   /* 15 - 17px */
  --text-lg: clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem);      /* 18 - 21.5px */
  --text-xl: clamp(1.4rem, 1.25rem + 0.75vw, 1.75rem);      /* 22 - 28px */
  --text-2xl: clamp(1.8rem, 1.5rem + 1.5vw, 2.5rem);        /* 28 - 40px */
  --text-3xl: clamp(2.4rem, 1.9rem + 2.5vw, 3.6rem);        /* 38 - 57px */
  --text-4xl: clamp(3.2rem, 2.4rem + 4vw, 5.2rem);          /* 51 - 83px */

  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.6;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.06em;
  --tracking-widest: 0.14em;        /* For uppercase category headers */

  /* --- SPACING & BLACKSPACE SCALE --- */
  --space-2xs: 0.5rem;              /* 8px */
  --space-xs: 0.75rem;              /* 12px */
  --space-sm: 1rem;                 /* 16px */
  --space-md: 1.5rem;               /* 24px */
  --space-lg: 2.5rem;               /* 40px */
  --space-xl: 4rem;                 /* 64px */
  --space-2xl: 6.5rem;              /* 104px */
  --space-3xl: 10rem;               /* 160px */

  --section-padding-y: clamp(4.5rem, 8vw, 9.5rem);
  --container-max-width: 1140px;
  --container-narrow-width: 760px;

  /* --- TRANSITIONS --- */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. GLOBAL RESET & BASE STYLES */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

.lead-text {
  font-size: var(--text-lg);
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.body-text-lg {
  font-size: var(--text-lg);
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.editorial-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

/* Links & Buttons */
a {
  color: var(--text-primary);
  text-decoration: none;
  background-image: linear-gradient(var(--color-accent), var(--color-accent));
  background-position: 0% 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: background-size var(--transition-smooth), color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
  background-size: 100% 1px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85em 2em;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color-strong);
  border-radius: 0px;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  text-decoration: none;
  background-image: none !important;
  transition: all var(--transition-smooth);
  cursor: pointer;
}

.button:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.button-accent {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.button-accent:hover {
  background-color: var(--color-accent);
  color: var(--bg-primary);
  border-color: var(--color-accent);
}

/* Layout Utilities */
.container-editorial {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: var(--container-narrow-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-editorial {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
}

.grid-editorial-2col {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--space-xl);
}

.hairline-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 0;
}

.margin-bottom-lg {
  margin-bottom: var(--space-lg);
}

.margin-top-md {
  margin-top: var(--space-md);
}

/* 3. HEADER & STICKY NAVIGATION */
.editorial-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-smooth), 
              border-color var(--transition-smooth), 
              backdrop-filter var(--transition-smooth);
}

.editorial-header.is-scrolled {
  background-color: rgba(10, 10, 11, 0.88);
  border-bottom-color: var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 1.25rem var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  background-image: none !important;
  letter-spacing: var(--tracking-wide);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-item {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  background-image: none !important;
  transition: color var(--transition-fast);
}

.nav-item:hover {
  color: var(--text-primary);
}

.nav-item.nav-cta {
  color: var(--color-accent);
  padding: 0.4em 1em;
  border: 1px solid var(--border-color);
}

.nav-item.nav-cta:hover {
  border-color: var(--color-accent);
}

/* 4. HERO SECTION */
.section-hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding-top: 8rem;
  padding-bottom: 4rem;
}

.hero-title {
  font-size: var(--text-4xl);
  line-height: 1.05;
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* 5. TIMELINE SECTION */
.timeline-container {
  display: flex;
  flex-direction: column;
}

.timeline-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-color);
}

.timeline-row:first-child {
  border-top: 1px solid var(--border-color);
}

.timeline-date {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-accent);
  display: block;
  letter-spacing: var(--tracking-wide);
  margin-bottom: 0.25rem;
}

.timeline-location {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  display: block;
}

.role-title {
  font-size: var(--text-lg);
  margin-bottom: 0.25rem;
}

.company-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.role-desc {
  font-size: var(--text-base);
}

/* 6. LANGUAGES SECTION */
.hairline-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hairline-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.hairline-list-item:first-child {
  border-top: 1px solid var(--border-color);
}

.lang-name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
}

.lang-level {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.section-lead {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* 7. EDUCATION & CREDENTIALS */
.block-subheading {
  font-size: var(--text-xl);
  margin-bottom: var(--space-md);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.cred-item {
  margin-bottom: var(--space-md);
}

.cred-title {
  font-size: var(--text-lg);
  margin-bottom: 0.2rem;
}

.cred-institution {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: var(--tracking-wide);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.cred-details {
  font-size: var(--text-sm);
}

.cert-list {
  list-style: none;
}

.cert-list li {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--border-color);
  font-size: var(--text-base);
  color: var(--text-secondary);
}

.cert-list li strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* 8. FORMATION SECTION */
.editorial-quote-block {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-md);
  margin-top: var(--space-md);
}

/* 9. CONTACT SECTION */
.contact-links-grid {
  display: flex;
  flex-direction: column;
}

.contact-item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.contact-item:first-child {
  border-top: 1px solid var(--border-color);
}

.contact-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  margin-bottom: 0.25rem;
}

.contact-value, .contact-value-static {
  font-size: var(--text-lg);
}

/* 10. FOOTER */
.editorial-footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border-color);
}

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.back-to-top {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
}

/* 11. SCROLL REVEAL ANIMATIONS */
.fade-heading {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 650ms cubic-bezier(0.16, 1, 0.3, 1), 
              transform 650ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-heading {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* 12. RESPONSIVE BREAKPOINTS */
@media (max-width: 768px) {
  .grid-editorial-2col {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .timeline-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
    padding: var(--space-md) 0;
  }

  .timeline-meta {
    margin-bottom: 0.5rem;
  }

  .hairline-list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .lang-level {
    font-size: var(--text-xs);
    color: var(--color-accent);
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0.85rem var(--space-sm);
  }

  .header-nav {
    overflow-x: auto;
    white-space: nowrap;
    gap: var(--space-sm);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .header-nav::-webkit-scrollbar {
    display: none;
  }

  .nav-item {
    font-size: 0.7rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .button {
    width: 100%;
    text-align: center;
  }
}