/* 
 * Vikash Kumar — Personal Profile & Digital Brand Website
 * Design System: Modern Blue-and-White Executive Theme
 * Primary background: #FFFFFF | Secondary background: #F8FAFC
 * Primary text: #0F172A | Secondary text: #475569 | Accent: #2563EB (Royal Blue) | Border: #E2E8F0
 */

:root {
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F8FAFC;
  --color-bg-tertiary: #F1F5F9;
  --color-card-bg: #FFFFFF;
  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #94A3B8;
  --color-accent: #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-accent-dark: #1E3A8A;
  --color-accent-subtle: rgba(37, 99, 235, 0.08);
  --color-accent-glow: rgba(37, 99, 235, 0.18);
  --color-border: #E2E8F0;
  --color-border-subtle: #F1F5F9;
  --color-border-hover: #CBD5E1;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-handwriting: 'Alex Brush', 'Caveat', cursive, serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --max-width: 1200px;
  --header-height: 70px;
  --header-height-mobile: 62px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 18px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 36px -6px rgba(15, 23, 42, 0.09);
  
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 12px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  background-color: var(--color-bg-primary);
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--color-accent);
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
  outline: 2px solid var(--color-text-primary);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
}

@media (min-width: 640px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  font-weight: 700;
  line-height: 1.25;
}

p {
  color: var(--color-text-secondary);
}

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

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

/* Section Header Structure */
.section-header {
  margin-bottom: 2rem;
  max-width: 720px;
}

@media (min-width: 768px) {
  .section-header {
    margin-bottom: 2.5rem;
  }
}

.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  text-wrap: balance;
}

.section-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .section-subtitle {
    font-size: 1.0625rem;
  }
}

/* Accent Underline in Royal Blue */
.title-accent-line {
  display: block;
  width: 44px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
  margin-top: 8px;
  margin-bottom: 12px;
}

/* Buttons and Links - Touch Target Optimization (>= 44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-smooth);
  white-space: nowrap;
  text-decoration: none;
  font-family: inherit;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-bg-secondary);
  transform: translateY(-1px);
}

.btn-blue {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-blue:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}

.btn-text {
  padding: 8px 12px;
  min-height: 40px;
  color: var(--color-text-primary);
  font-weight: 600;
  background: transparent;
}

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

.btn-sm {
  padding: 8px 16px;
  min-height: 38px;
  font-size: 0.8125rem;
}

/* ==========================================================================
   1. STICKY HEADER (Mobile Optimized)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height-mobile);
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

@media (min-width: 960px) {
  .site-header {
    height: var(--header-height);
  }
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Brand Wordmark & Logo */
.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

@media (min-width: 768px) {
  .brand-lockup {
    font-size: 1.125rem;
  }
}

.brand-logo-img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid rgba(37, 99, 235, 0.25);
  background-color: var(--color-text-primary);
}

@media (min-width: 960px) {
  .brand-logo-img {
    width: 36px;
    height: 36px;
  }
}

.brand-title {
  font-weight: 700;
}

/* Navigation Links */
.site-nav {
  display: none;
}

@media (min-width: 960px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: 24px;
  }
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* Header Right Zone */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Dropdown Menu for Documents */
.nav-dropdown {
  position: relative;
  display: none;
}

@media (min-width: 600px) {
  .nav-dropdown {
    display: block;
  }
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  min-height: 40px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dropdown-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: #FFFFFF;
}

.dropdown-arrow {
  transition: transform var(--transition-fast);
}

.nav-dropdown.is-open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  display: none;
  z-index: 1010;
}

.nav-dropdown.is-open .dropdown-menu {
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.dropdown-item-meta {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

/* Mobile Hamburger Toggle (44px min touch target) */
.mobile-menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #FFFFFF;
  color: var(--color-text-primary);
  cursor: pointer;
  padding: 0;
}

.mobile-menu-toggle:active {
  background-color: var(--color-bg-secondary);
}

@media (min-width: 960px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile Drawer Overlay */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
}

.mobile-drawer-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 86%;
  max-width: 360px;
  background-color: #FFFFFF;
  z-index: 1060;
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  display: flex;
  flex-direction: column;
  box-shadow: -6px 0 28px rgba(15, 23, 42, 0.12);
  overflow-y: auto;
  padding: 20px;
  -webkit-overflow-scrolling: touch;
}

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

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.mobile-nav-link:hover, .mobile-nav-link:active {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.mobile-drawer-docs {
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
}

.mobile-drawer-docs-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.mobile-doc-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 10px 14px;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.mobile-doc-link:active {
  background-color: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ==========================================================================
   SECTION 1: HERO — VIKASH KUMAR (Mobile Optimized)
   ========================================================================== */
.hero-section {
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg-secondary) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.hero-designation-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  max-width: 620px;
}

@media (min-width: 768px) {
  .hero-description {
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: 1.75rem;
  }
}

.hero-actions {
  display: flex;
  align-items: stretch;
  gap: 12px;
  flex-direction: column;
  margin-bottom: 1.75rem;
}

@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    margin-bottom: 2rem;
  }
}

/* REFINED HANDWRITTEN SIGNATURE (Blue & White Theme) */
.signature-box {
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  max-width: 300px;
}

.signature-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.signature-container {
  position: relative;
  width: 100%;
  height: 64px;
  display: flex;
  align-items: center;
}

.signature-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.sig-stroke {
  stroke: var(--color-text-primary);
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  animation: drawSigSmooth 2s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.25s;
}

/* Electric Sapphire Underline in Blue & White Theme */
.sig-flourish {
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  animation: drawSigSmooth 1.6s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.8s;
}

@keyframes drawSigSmooth {
  to {
    stroke-dashoffset: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sig-stroke, .sig-flourish {
    animation: none;
    stroke-dashoffset: 0;
  }
}

/* Hero Portrait Visual Frame */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  width: 100%;
}

.portrait-frame {
  position: relative;
  width: 100%;
  max-width: 340px;
  aspect-ratio: 4 / 5;
  background-color: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .portrait-frame {
    max-width: 400px;
  }
}

.portrait-frame::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: calc(var(--radius-xl) - 4px);
  pointer-events: none;
  z-index: 2;
}

.portrait-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform var(--transition-smooth);
}

.portrait-frame:hover .portrait-image {
  transform: scale(1.02);
}

.portrait-badge {
  position: absolute;
  bottom: 14px;
  left: 14px;
  right: 14px;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  z-index: 3;
}

.portrait-badge-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.portrait-badge-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
}

/* ==========================================================================
   SECTION 2: OFFICIAL DIGITAL PROFILES (Mobile Touch Friendly)
   ========================================================================== */
.profiles-section {
  padding: 2.25rem 0;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.profiles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 420px) {
  .profiles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .profiles-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
}

.profile-card {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 12px 14px;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.profile-card:hover, .profile-card:active {
  background-color: #FFFFFF;
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.profile-card-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  flex-shrink: 0;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.profile-card:hover .profile-card-icon,
.profile-card:active .profile-card-icon {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.profile-card-info {
  overflow: hidden;
}

.profile-card-name {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-primary);
  white-space: nowrap;
}

.profile-card-handle {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   SECTION 3: CONNECT WITH VIKASH (Mobile Touch Action)
   ========================================================================== */
.connect-priority-section {
  padding: 2.5rem 0;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.connect-priority-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 680px) {
  .connect-priority-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

.direct-contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 58px;
  padding: 14px 16px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.direct-contact-card:hover, .direct-contact-card:active {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.direct-contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.direct-contact-meta {
  overflow: hidden;
}

.direct-contact-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
}

.direct-contact-val {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   SECTION 4: VISITING CARD & CV DOWNLOADS (Mobile Friendly)
   ========================================================================== */
.docs-priority-section {
  padding: 2.5rem 0;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.docs-priority-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 768px) {
  .docs-priority-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
}

.doc-box {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: border-color var(--transition-fast);
}

.doc-box:hover {
  border-color: var(--color-accent);
}

.doc-box-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.doc-box-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.doc-box-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.doc-box-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.doc-box-actions {
  display: flex;
  align-items: stretch;
  gap: 10px;
  flex-direction: column;
}

@media (min-width: 480px) {
  .doc-box-actions {
    flex-direction: row;
    align-items: center;
  }
}

/* ==========================================================================
   SECTION 5: PHOTO GALLERY (Mobile Optimized Grid & Lightbox)
   ========================================================================== */
.gallery-section {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.gallery-preview-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 2rem;
}

@media (min-width: 480px) {
  .gallery-preview-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .gallery-preview-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

/* Full Gallery Page Grid: 4 cols on large screens, 3 on desktop, 2 on tablet/mobile */
.gallery-full-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 400px) {
  .gallery-full-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

@media (min-width: 768px) {
  .gallery-full-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

@media (min-width: 1100px) {
  .gallery-full-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

.gallery-card {
  position: relative;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.gallery-card:hover, .gallery-card:active {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.gallery-card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-bg-tertiary);
}

.gallery-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-card:hover .gallery-card-img {
  transform: scale(1.04);
}

.gallery-card-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 7px;
  border-radius: 4px;
  background-color: rgba(255, 255, 255, 0.94);
  color: var(--color-accent-dark);
  border: 1px solid var(--color-border);
}

.gallery-card-body {
  padding: 12px 14px;
}

.gallery-card-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 2px;
  line-height: 1.35;
}

@media (min-width: 768px) {
  .gallery-card-title {
    font-size: 0.9375rem;
  }
}

.gallery-card-category {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 600;
}

/* Category Filter Bar on Gallery Page (Horizontal Touch Swipe on Mobile) */
.gallery-filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 1.75rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.gallery-filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-tab {
  padding: 8px 16px;
  min-height: 40px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 20px;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.filter-tab:hover, .filter-tab:active {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.filter-tab.is-active {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* Lightbox Modal (Full touch-friendly on mobile) */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  z-index: 2500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
}

.lightbox-modal.is-active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content-box {
  position: relative;
  max-width: 900px;
  width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img-wrapper {
  position: relative;
  max-height: 72vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: #0F172A;
}

.lightbox-img {
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  user-select: none;
}

.lightbox-caption-box {
  margin-top: 12px;
  text-align: center;
  color: #FFFFFF;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}

.lightbox-caption-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: #FFFFFF;
  text-align: left;
  line-height: 1.4;
}

.lightbox-caption-counter {
  font-size: 0.8125rem;
  color: #60A5FA;
  font-weight: 700;
  margin-left: 12px;
  flex-shrink: 0;
}

.lightbox-close {
  position: absolute;
  top: -44px;
  right: 0;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  border: none;
  color: #FFFFFF;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.lightbox-close:hover, .lightbox-close:active {
  background: var(--color-accent);
  color: #FFFFFF;
}

.lightbox-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 10;
}

.lightbox-arrow:hover, .lightbox-arrow:active {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.lightbox-prev {
  left: 8px;
}

.lightbox-next {
  right: 8px;
}

@media (min-width: 960px) {
  .lightbox-prev {
    left: -56px;
  }
  .lightbox-next {
    right: -56px;
  }
}

/* ==========================================================================
   OTHER SECTIONS (Blue & White Theme)
   ========================================================================== */
.about-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 992px) {
  .about-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
  }
}

.about-card-primary {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3.5vw, 2.25rem);
}

.summary-lead {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.bio-paragraphs {
  display: flex;
  flex-direction: column;
  gap: 1.125rem;
}

.bio-paragraph {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.bio-paragraph strong {
  color: var(--color-text-primary);
}

.about-side-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.competencies-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 1.125rem;
}

.competencies-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.competency-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.competency-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.competency-content h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.competency-content p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.provenance-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.provenance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.provenance-box {
  padding: 10px 12px;
  background-color: #FFFFFF;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
}

.provenance-box-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.provenance-box-val {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Timeline */
.timeline-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.timeline-wrapper {
  position: relative;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.timeline-wrapper::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 20px;
  left: 20px;
  width: 2px;
  background-color: var(--color-border);
}

@media (min-width: 768px) {
  .timeline-wrapper::before {
    left: 28px;
  }
}

.timeline-items {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-entry {
  position: relative;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .timeline-entry {
    gap: 28px;
  }
}

.timeline-marker {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 2px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 2;
  box-shadow: 0 0 0 4px #FFFFFF;
}

.timeline-marker-inner {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.timeline-card {
  flex-grow: 1;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

@media (min-width: 768px) {
  .timeline-card {
    padding: 1.5rem;
  }
}

.timeline-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.timeline-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.timeline-period {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
}

.timeline-org {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.timeline-role {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Business Section */
.business-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.business-showcase {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.business-header-strip {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}

.business-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 900px) {
  .business-grid {
    grid-template-columns: 1.3fr 0.7fr;
  }
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 1.25rem;
}

@media (min-width: 480px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.service-card {
  padding: 12px 14px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.service-card h5 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.service-card p {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.business-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.business-info-block h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}

.business-info-block p, .business-info-block address {
  font-size: 0.875rem;
  color: var(--color-text-primary);
  font-style: normal;
  line-height: 1.5;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
}

.modal-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  overflow: hidden;
  transform: translateY(20px);
  transition: transform var(--transition-smooth);
}

.modal-overlay.is-active .modal-container {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text-muted);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.modal-close:hover, .modal-close:active {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.modal-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.vcard-preview-box {
  width: 100%;
  aspect-ratio: 1.75 / 1;
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
  border-radius: 12px;
  padding: 18px;
  position: relative;
  box-shadow: var(--shadow-sm);
  margin-bottom: 14px;
  overflow: hidden;
}

.vcard-preview-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-accent);
}

.vcard-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.vcard-name {
  font-size: 1.125rem;
  font-weight: 800;
  color: #0F172A;
  letter-spacing: -0.01em;
}

.vcard-role {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
}

.vcard-logo {
  font-size: 0.6875rem;
  font-weight: 800;
  background: var(--color-accent);
  color: #FFFFFF;
  padding: 3px 6px;
  border-radius: 4px;
}

.vcard-details {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.8125rem;
  color: #334155;
}

.modal-footer {
  padding: 14px 18px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* Footer */
.site-footer {
  padding: 2.5rem 0;
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}

.footer-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-link:hover, .footer-link:active {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Toast Notice */
.toast-notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  left: 20px;
  max-width: 400px;
  margin: 0 auto;
  background: #0F172A;
  color: #FFFFFF;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-smooth);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 600px) {
  .toast-notice {
    left: auto;
    right: 24px;
    bottom: 24px;
    margin: 0;
    text-align: left;
  }
}

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

/* Back to Top Button (44px touch target) */
.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  z-index: 990;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover, .back-to-top:active {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
  transform: translateY(-2px);
}