/* ==========================================================================
   SAHIL HARDE — MINIMALIST CLASSY PORTFOLIO
   Design System: Editorial Light Canvas / Modern Monospace Accent
   Inspired by: dhravya.dev & Apple Human Interface
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Canvas & Surfaces */
  --bg-canvas: #fafaf9;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f4f4f2;
  --bg-surface-subtle: #f8fafc;
  --bg-chip: #f1f5f9;
  --bg-chip-hover: #e2e8f0;

  /* Ink & Typography */
  --ink-primary: #09090b;
  /* Zinc 950 */
  --ink-secondary: #3f3f46;
  /* Zinc 700 */
  --ink-muted: #71717a;
  /* Zinc 500 */
  --ink-faint: #a1a1aa;
  /* Zinc 400 */

  /* Hairlines & Dividers */
  --line-hairline: rgba(0, 0, 0, 0.07);
  --line-strong: rgba(0, 0, 0, 0.12);
  --line-focus: #18181b;

  /* Accents */
  --color-blue: #2f6bff;
  --accent-blue: #2563eb;
  --accent-emerald: #059669;
  --accent-emerald-bg: #ecfdf5;
  --accent-emerald-border: #a7f3d0;

  /* Light Terminal Window */
  --term-bg: #ffffff;
  --term-bar: #f8fafc;
  --term-border: rgba(0, 0, 0, 0.08);
  --term-text: #1e293b;
  --term-muted: #64748b;
  --term-prompt: #2563eb;
  --term-accent: #059669;

  /* Typography Stacks */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Hanken Grotesk', var(--font-sans);
  --font-serif: 'Newsreader', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout & Geometry */
  --column-max-width: 680px;
  --sidebar-width: 175px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
  --shadow-dropdown: 0 12px 32px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-term: 0 12px 32px -8px rgba(0, 0, 0, 0.07), 0 0 0 1px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --ease-snappy: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-snappy);
  --transition-normal: 250ms var(--ease-snappy);
}

/* --------------------------------------------------------------------------
   2. Reset & Document Setup
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
}

body {
  font-family: var(--font-sans);
  line-height: 1.65;
  color: var(--ink-secondary);
  background-color: var(--bg-canvas);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Ambient Dot Grid */
.dot-matrix-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(rgba(0, 0, 0, 0.065) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.85;
}

::selection {
  background-color: #dbeafe;
  color: #1e3a8a;
}

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

button,
input,
textarea {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

/* --------------------------------------------------------------------------
   3. Custom Live Cursor (Blue Arrow & Link Ring)
   -------------------------------------------------------------------------- */
@media (pointer: fine) {
  body.live-cursor {
    cursor: none;
  }

  body.live-cursor a,
  body.live-cursor button,
  body.live-cursor [role="button"],
  body.live-cursor .quick-tag,
  body.live-cursor .link-action,
  body.live-cursor .social-pill,
  body.live-cursor .nav-item,
  body.live-cursor .util-icon-btn,
  body.live-cursor .util-cmd-btn {
    cursor: none !important;
  }

  /* Keep native text selection cursor on form inputs and textareas */
  body.live-cursor input,
  body.live-cursor textarea,
  body.live-cursor select {
    cursor: text !important;
  }
}

#cursor-root {
  pointer-events: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;
}

.cursor-dot {
  position: fixed;
  pointer-events: none;
  top: 0;
  left: 0;
  transform: translate(-100px, -100px);
  will-change: transform;
  transition: opacity 0.15s ease;
  z-index: 99999;
}

/* Older blue pointer arrow */
.cursor-arrow {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  transform-origin: 0 0;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

/* HIDE arrow cursor completely when hovering over interactive links/buttons */
.cursor-dot.is-link .cursor-arrow {
  opacity: 0 !important;
  transform: scale(0.2) !important;
  pointer-events: none;
}

/* Older clean blue circle (reduced size, no blur inside) */
.cursor-ring {
  position: absolute;
  width: 34px;
  height: 34px;
  top: -17px;
  left: -17px;
  border-radius: 50%;
  border: 2px solid var(--color-blue);
  background-color: rgba(47, 107, 255, 0.16);
  pointer-events: none;
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Outer heartbeat fade wave (circle stays same size, outer fade beats) */
.cursor-ring::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 2px solid var(--color-blue);
  opacity: 0;
  pointer-events: none;
}

/* When hovering over interactive elements: show circle stably & beat outer fade */
.cursor-dot.is-link .cursor-ring {
  opacity: 1;
  transform: scale(1);
}

.cursor-dot.is-link .cursor-ring::after {
  animation: heartbeat-fade 1.35s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes heartbeat-fade {
  0% {
    transform: scale(1);
    opacity: 0.85;
    box-shadow: 0 0 0 0 rgba(47, 107, 255, 0.5);
  }

  16% {
    transform: scale(1.22);
    opacity: 0.55;
    box-shadow: 0 0 10px 2px rgba(47, 107, 255, 0.35);
  }

  30% {
    transform: scale(1.1);
    opacity: 0.35;
    box-shadow: 0 0 4px 1px rgba(47, 107, 255, 0.2);
  }

  46% {
    transform: scale(1.32);
    opacity: 0.45;
    box-shadow: 0 0 14px 4px rgba(47, 107, 255, 0.28);
  }

  80%,
  100% {
    transform: scale(1.55);
    opacity: 0;
    box-shadow: 0 0 22px 6px rgba(47, 107, 255, 0);
  }
}

/* --------------------------------------------------------------------------
   4. Main Multi-Column Layout & Sidebar (layout)
   -------------------------------------------------------------------------- */
.site-layout {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* Left Sidebar (Image 2) */
.site-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  width: var(--sidebar-width);
  flex-shrink: 0;
  border-right: 1px solid var(--line-hairline);
  padding: 32px 16px 24px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(250, 250, 249, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 40;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
  font-size: 0.938rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-item:hover {
  color: var(--ink-primary);
  background-color: rgba(0, 0, 0, 0.04);
}

.nav-item.active {
  color: var(--color-blue);
  font-weight: 600;
}

.label-full {
  display: inline;
}

.label-short {
  display: none;
}

.nav-icon {
  display: grid;
  place-items: center;
  color: currentColor;
}

.sidebar-utilities {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--line-hairline);
}

.util-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
  background: transparent;
  transition: all var(--transition-fast);
}

.util-icon-btn:hover {
  color: var(--ink-primary);
  background-color: var(--bg-chip);
}

.util-cmd-btn {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-xs);
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.util-cmd-btn:hover {
  background-color: var(--bg-chip-hover);
  color: var(--ink-primary);
}

/* --------------------------------------------------------------------------
   5. Main Content Area & Column
   -------------------------------------------------------------------------- */
.page-main {
  flex: 1;
  padding: 48px 32px 80px 48px;
  overflow-x: hidden;
}

.main-column {
  max-width: var(--column-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 64px;
}

/* --------------------------------------------------------------------------
   6. Hero Section & Dynamic Typewriter Headline
   -------------------------------------------------------------------------- */
.hero-section {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-author-label {
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--ink-muted);
  font-family: var(--font-sans);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: 2.18rem;
  line-height: 1.28;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.025em;
  max-width: 100%;
}

.hero-line-1 {
  display: block;
}

.hero-line-2 {
  display: block;
  margin-top: 2px;
}

.italic-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: #1e293b;
}

.dynamic-typed-wrapper {
  display: inline-block;
  white-space: nowrap;
}

.typed-cursor {
  display: inline-block;
  font-weight: 300;
  color: var(--color-blue);
  margin-left: 2px;
  animation: cursor-blink 1s infinite;
}

@keyframes cursor-blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.highlight-ink {
  color: var(--ink-primary);
  text-decoration: underline;
  text-decoration-color: #cbd5e1;
  text-underline-offset: 5px;
  text-decoration-thickness: 2px;
}

.hero-summary {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  max-width: 640px;
  text-align: justify;
  text-justify: inter-word;
  hyphens: none;
  -webkit-hyphens: none;
}

.hero-summary.italic-serif {
  font-size: 1.28rem;
  line-height: 1.6;
  text-align: left;
}

/* Social Row */
.social-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 2px;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-pill);
  font-size: 0.844rem;
  font-weight: 500;
  color: var(--ink-secondary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.social-pill:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--line-strong);
  color: var(--ink-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card);
}

.social-pill .external-arrow {
  color: var(--ink-faint);
  font-size: 0.813rem;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.social-pill:hover .external-arrow {
  color: var(--ink-primary);
  transform: translate(2px, -2px);
}

.action-pill {
  background-color: var(--bg-chip);
}

.action-pill:hover {
  background-color: #e2e8f0;
}

/* --------------------------------------------------------------------------
   7. Developer Terminal (Classy Light Background Option)
   -------------------------------------------------------------------------- */
.terminal-wrapper {
  margin-top: 8px;
  width: 100%;
}

.terminal-window.light-theme-terminal {
  background-color: var(--term-bg);
  border: 1px solid var(--term-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-term);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  font-size: 0.813rem;
}

.terminal-bar {
  background-color: var(--term-bar);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.terminal-buttons {
  display: flex;
  align-items: center;
  gap: 7px;
}

.btn-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-close {
  background-color: #ff5f56;
}

.dot-min {
  background-color: #ffbd2e;
}

.dot-max {
  background-color: #27c93f;
}

.terminal-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--term-muted);
  font-size: 0.75rem;
  font-weight: 500;
}

.terminal-status-badge {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-emerald);
  letter-spacing: 0.08em;
  background: var(--accent-emerald-bg);
  border: 1px solid var(--accent-emerald-border);
  padding: 2px 6px;
  border-radius: 4px;
}

.terminal-screen {
  padding: 16px 20px;
  max-height: 250px;
  min-height: 160px;
  overflow-y: auto;
  color: var(--term-text);
  line-height: 1.6;
  background-color: #ffffff;
  scroll-behavior: smooth;
}

.terminal-screen:focus {
  outline: none;
}

.terminal-screen::-webkit-scrollbar {
  width: 5px;
}

.terminal-screen::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 3px;
}

.term-entry {
  margin-bottom: 6px;
  word-break: break-word;
}

.term-welcome {
  color: #94a3b8;
  font-size: 0.75rem;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.08);
}

.term-prompt {
  color: var(--term-prompt);
  font-weight: 600;
  margin-right: 6px;
}

.term-cmd {
  color: var(--ink-primary);
  font-weight: 600;
}

.term-result {
  color: #334155;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 2px solid #93c5fd;
  line-height: 1.55;
}

.term-code {
  color: #1e293b;
  font-size: 0.78rem;
}

.terminal-input-bar {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  background-color: var(--term-bar);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.term-field {
  flex: 1;
  color: var(--ink-primary);
  font-family: var(--font-mono);
  font-size: 0.813rem;
  padding: 4px 8px;
  background: transparent;
  outline: none;
}

.term-field::placeholder {
  color: #94a3b8;
}

.term-enter-btn {
  color: #64748b;
  font-size: 0.9rem;
  padding: 2px 8px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.term-enter-btn:hover {
  color: var(--ink-primary);
  background-color: rgba(0, 0, 0, 0.05);
}

.terminal-quick-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 16px;
  background-color: #ffffff;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.quick-label {
  font-size: 0.719rem;
  color: #64748b;
  margin-right: 2px;
}

.quick-tag {
  font-size: 0.719rem;
  color: #475569;
  background-color: #f1f5f9;
  border: 1px solid #e2e8f0;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  transition: all var(--transition-fast);
}

.quick-tag:hover {
  color: var(--color-blue);
  background-color: #eff6ff;
  border-color: #bfdbfe;
}

/* --------------------------------------------------------------------------
   8. Content Sections & Typography
   -------------------------------------------------------------------------- */
.content-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  scroll-margin-top: 40px;
}

.section-header-flex {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.02em;
}

.section-hint {
  font-size: 0.813rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

.prose-content {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  text-align: justify;
  text-justify: inter-word;
  hyphens: none;
  -webkit-hyphens: none;
}

/* --------------------------------------------------------------------------
   9. Experience Cards
   -------------------------------------------------------------------------- */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.experience-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.experience-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card);
  transform: translateY(-1px);
}

.exp-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.exp-role {
  font-family: var(--font-display);
  font-size: 1.063rem;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.01em;
}

.exp-company {
  font-size: 0.875rem;
  color: var(--ink-muted);
  font-weight: 500;
  margin-top: 2px;
}

.exp-date {
  font-size: 0.813rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.exp-summary {
  font-size: 0.938rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.clean-bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.clean-bullet-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.clean-bullet-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  top: 0;
  color: var(--ink-faint);
  font-weight: bold;
}

/* --------------------------------------------------------------------------
   10. Projects List
   -------------------------------------------------------------------------- */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.project-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--transition-fast);
}

.project-item:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.project-top-line {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.project-title-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.01em;
}

.project-flagship-tag {
  font-size: 0.688rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: #eff6ff;
  color: var(--color-blue);
  border: 1px solid #bfdbfe;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.link-action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.813rem;
  font-weight: 600;
  color: var(--ink-primary);
  background-color: var(--bg-chip);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-hairline);
  transition: all var(--transition-fast);
}

.link-action:hover {
  background-color: #18181b;
  color: #ffffff;
  border-color: #18181b;
}

.link-action .arrow {
  font-size: 0.813rem;
  transition: transform var(--transition-fast);
}

.link-action:hover .arrow {
  transform: translate(2px, -2px);
}

.meta-label {
  font-size: 0.781rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  background-color: var(--bg-surface-elevated);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-hairline);
}

.meta-badge-success {
  font-size: 0.781rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background-color: var(--accent-emerald-bg);
  border: 1px solid var(--accent-emerald-border);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.project-summary {
  font-size: 0.938rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

/* Badge Pills */
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.719rem;
  font-weight: 500;
  color: var(--ink-muted);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--line-hairline);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.badge:hover {
  color: var(--ink-primary);
  background-color: var(--bg-chip-hover);
  border-color: var(--line-strong);
}

.badge.highlight {
  color: var(--ink-primary);
  font-weight: 600;
  background-color: #f1f5f9;
  border-color: #cbd5e1;
}

/* --------------------------------------------------------------------------
   10.5 Certifications & Licenses Grid
   -------------------------------------------------------------------------- */
.cert-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.cert-filter-btn {
  background: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 0.813rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cert-filter-btn:hover {
  border-color: var(--line-strong);
  color: var(--ink-primary);
  background: var(--bg-surface-elevated);
}

.cert-filter-btn.active {
  background: var(--ink-primary);
  color: #ffffff;
  border-color: var(--ink-primary);
  font-weight: 600;
}

.cert-card.is-hidden,
.cert-card.is-extra-hidden {
  display: none !important;
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.cert-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--transition-fast);
  position: relative;
}

.cert-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.cert-card-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.cert-issuer-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 1px solid var(--line-hairline);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: #ffffff;
  padding: 0;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.cert-card:hover .cert-issuer-icon {
  transform: scale(1.04);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
}

.cert-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cert-more-wrapper {
  display: flex;
  justify-content: center;
  margin-top: 24px;
}

.cert-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line-strong);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 9999px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cert-more-btn:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--color-blue);
  color: var(--color-blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.cert-more-btn .cert-more-arrow {
  transition: transform var(--transition-fast);
}

.cert-more-btn.is-expanded .cert-more-arrow {
  transform: rotate(180deg);
}

.cert-heading-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.cert-title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink-primary);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.cert-issuer-name {
  font-size: 0.813rem;
  color: var(--ink-muted);
  font-weight: 500;
}

.cert-description {
  font-size: 0.865rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  margin: 0;
  flex-grow: 1;
}

.cert-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.cert-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

.cert-meta-item svg {
  stroke: var(--ink-faint);
}

.cert-id-tag {
  background-color: var(--bg-surface-elevated);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-hairline);
  color: var(--ink-secondary);
  font-weight: 500;
}

.cert-action-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-top: 6px;
  border-top: 1px solid var(--line-hairline);
}

.cert-verify-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.813rem;
  font-weight: 600;
  color: var(--color-blue);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.cert-verify-link .arrow {
  font-size: 0.813rem;
  transition: transform var(--transition-fast);
}

.cert-verify-link:hover {
  color: var(--color-blue-deep);
  text-decoration: underline;
}

.cert-verify-link:hover .arrow {
  transform: translate(2px, -2px);
}

/* --------------------------------------------------------------------------
   11. Skills Catalog
   -------------------------------------------------------------------------- */
.skills-catalog {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.skill-category {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all var(--transition-fast);
}

.skill-category:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card);
}

.skill-cat-title {
  font-size: 0.813rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-primary);
}

/* --------------------------------------------------------------------------
   12. Education Section
   -------------------------------------------------------------------------- */
.education-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.edu-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all var(--transition-fast);
}

.edu-item:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card);
}

.edu-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.edu-degree {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.edu-school {
  font-size: 0.875rem;
  color: var(--ink-muted);
  margin-top: 2px;
}

.edu-score-badge {
  font-family: var(--font-mono);
  font-size: 0.813rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background-color: var(--accent-emerald-bg);
  border: 1px solid var(--accent-emerald-border);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.edu-meta {
  font-size: 0.813rem;
  color: var(--ink-muted);
}

/* --------------------------------------------------------------------------
   13. Contact & Transmission Section
   -------------------------------------------------------------------------- */
.contact-section {
  gap: 22px;
}

.contact-intro {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-secondary);
}

.contact-methods-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.contact-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all var(--transition-fast);
}

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

.contact-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-chip);
  color: var(--ink-primary);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.contact-card:hover .contact-card-icon {
  background-color: #18181b;
  color: #ffffff;
}

.contact-card-info {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.contact-card-title {
  font-size: 0.938rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.contact-card-desc {
  font-size: 0.781rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

.contact-card-arrow {
  color: var(--ink-faint);
  font-size: 1rem;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.contact-card:hover .contact-card-arrow {
  color: var(--ink-primary);
  transform: translate(2px, -2px);
}

/* Transmission Form */
.contact-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--line-hairline);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.clean-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-hairline);
}

.form-title {
  font-family: var(--font-display);
  font-size: 1.063rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.form-note {
  font-size: 0.781rem;
  color: var(--ink-muted);
}

.form-fields-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.field-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-item label {
  font-size: 0.813rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.clean-input,
.clean-textarea {
  width: 100%;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--ink-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.clean-input:focus,
.clean-textarea:focus {
  background-color: #ffffff;
  border-color: var(--line-focus);
  box-shadow: 0 0 0 3px rgba(24, 24, 27, 0.08);
}

.clean-input::placeholder,
.clean-textarea::placeholder {
  color: var(--ink-faint);
}

.clean-textarea {
  resize: vertical;
  min-height: 110px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--ink-primary);
  color: #ffffff;
  border: 1px solid var(--ink-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
  background-color: #27272a;
  border-color: #27272a;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
}

.btn-submit {
  align-self: flex-start;
  padding: 10px 22px;
  font-size: 0.9rem;
  margin-top: 4px;
}

.spin {
  animation: spin 0.85s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: none;
  font-size: 0.844rem;
  color: var(--ink-muted);
  margin-top: 20px;
}

.footer-brand {
  font-weight: 600;
  color: var(--ink-primary);
  font-family: var(--font-display);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-links a:hover {
  color: var(--ink-primary);
  text-decoration: underline;
}

.footer-links .sep {
  color: var(--ink-faint);
}

/* --------------------------------------------------------------------------
   15. Command Palette (⌘K) Modal
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 17, 23, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

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

.cmd-modal-card {
  width: 100%;
  max-width: 580px;
  background-color: #ffffff;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-dropdown);
  overflow: hidden;
  transform: translateY(12px) scale(0.98);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.modal-overlay.open .cmd-modal-card {
  transform: translateY(0) scale(1);
}

.cmd-modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-hairline);
}

.cmd-prompt-symbol {
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-weight: 700;
}

#cmd-modal-input {
  flex: 1;
  font-size: 0.969rem;
  color: var(--ink-primary);
  outline: none;
}

.cmd-esc-hint {
  font-family: var(--font-mono);
  font-size: 0.688rem;
  font-weight: 600;
  color: var(--ink-muted);
  background-color: var(--bg-chip);
  border: 1px solid var(--line-hairline);
  padding: 2px 6px;
  border-radius: 4px;
}

.cmd-modal-results {
  max-height: 320px;
  overflow-y: auto;
  padding: 8px;
}

.cmd-group-label {
  font-size: 0.688rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  padding: 8px 12px 4px 12px;
}

.cmd-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cmd-item:hover,
.cmd-item.active {
  background-color: var(--bg-surface-elevated);
}

.cmd-item-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-primary);
}

.cmd-item-badge {
  font-family: var(--font-mono);
  font-size: 0.688rem;
  color: var(--ink-muted);
  background-color: var(--bg-chip);
  padding: 2px 6px;
  border-radius: 4px;
}

.cmd-modal-footer {
  padding: 10px 16px;
  background-color: var(--bg-surface-subtle);
  border-top: 1px solid var(--line-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.cmd-modal-footer kbd {
  font-family: var(--font-mono);
  background-color: #ffffff;
  border: 1px solid var(--line-strong);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.688rem;
}

/* --------------------------------------------------------------------------
   16. Toast Notifications
   -------------------------------------------------------------------------- */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: #18181b;
  color: #ffffff;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.844rem;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: toast-in 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.95);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.toast.toast-out {
  opacity: 0;
  transform: translateY(8px) scale(0.95);
}

/* --------------------------------------------------------------------------
   17. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .site-layout {
    flex-direction: column;
  }

  .site-sidebar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    width: 100%;
    height: auto;
    min-height: 56px;
    border-right: none;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding: 6px 4px;
    padding-bottom: max(6px, env(safe-area-inset-bottom, 0px));
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.05);
    z-index: 1000;
  }

  .sidebar-nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    max-width: 460px;
    margin: 0 auto;
    gap: 2px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5px 2px 4px 2px;
    gap: 3px;
    flex: 1;
    min-width: 40px;
    border-radius: 8px;
    color: var(--ink-muted);
    transition: all var(--transition-fast);
  }

  .nav-item .nav-icon {
    order: 1;
    display: grid;
    place-items: center;
    color: currentColor;
    transition: transform var(--transition-fast);
  }

  .nav-item .nav-icon svg {
    width: 18px;
    height: 18px;
  }

  .nav-item .nav-text {
    order: 2;
    display: block;
    font-size: 0.625rem;
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.01em;
    white-space: nowrap;
    text-align: center;
    max-width: 100%;
  }

  .label-full {
    display: none;
  }

  .label-short {
    display: inline;
  }

  .nav-item:hover,
  .nav-item.active {
    color: var(--color-blue);
    background: transparent;
  }

  .nav-item.active .nav-icon {
    transform: scale(1.12);
  }

  .sidebar-utilities {
    display: none;
  }

  .page-main {
    padding: 36px 18px 96px 18px;
  }

  .hero-headline {
    font-size: 1.85rem;
  }

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

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

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

  .site-footer {
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: 1.6rem;
  }

  .social-pill {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
}