:root {
  --color-bg: #050816;
  --color-bg-alt: #0b1221;
  --color-grid: rgba(139, 92, 246, 0.12);
  --color-surface: rgba(14, 20, 40, 0.88);
  --color-surface-strong: rgba(18, 26, 52, 0.94);
  --color-border: rgba(129, 140, 248, 0.35);
  --color-text: #e9edf8;
  --color-muted: #9aa4c8;
  --color-accent: #8b5cf6;
  --color-accent-strong: #22d3ee;
  --shadow-lg: 0 26px 64px rgba(9, 12, 34, 0.55);
  --shadow-md: 0 20px 46px rgba(8, 13, 32, 0.4);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: 220ms ease;
  --container-max: 1600px;
  --color-cement: #c7c9cc;
  --skill-check: #0f5e29;
  --skill-header-height: 72px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  /* Use Chalkboard SE (Bold) for body text and non-headings */
  font-family: 'Chalkboard SE', 'Marker Felt', 'Comic Sans MS', 'Plus Jakarta Sans', 'Inter',
    system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 700;
  color: var(--color-text);
  background-color: var(--color-bg);
}

body {
  min-height: 100vh;
  background-image: radial-gradient(circle at 20% 18%, rgba(139, 92, 246, 0.28) 0%, rgba(5, 8, 22, 0) 60%),
    radial-gradient(circle at 82% 14%, rgba(34, 211, 238, 0.24) 0%, rgba(5, 8, 22, 0) 56%),
    linear-gradient(165deg, #050816 0%, #0b1221 55%, #111a3a 100%),
    url('../assets/images/data-network.svg');
  background-size: 720px 720px, 560px 560px, cover, 420px 420px;
  background-position: 0 0, 92% 16%, center, 50% 40%;
  background-repeat: no-repeat, no-repeat, no-repeat, repeat;
  background-attachment: fixed;
  background-blend-mode: screen, screen, normal, lighten;
  scroll-behavior: smooth;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--color-accent);
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(12px, 1.6vw, 36px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  backdrop-filter: blur(18px);
  background: rgba(7, 11, 28, 0.82);
  border-bottom: 1px solid rgba(129, 140, 248, 0.28);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.brand {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  height: clamp(30px, 2.6vw, 40px); /* fit nicely in header space */
  width: auto;
  display: block;
  object-fit: contain;
  border-radius: 0;
}

.site-nav {
  display: flex;
  align-items: center;
}


.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.theme-toggle {
  border: 1px solid rgba(129, 140, 248, 0.4);
  background: rgba(16, 24, 48, 0.8);
  border-radius: 999px;
  padding: 0.45rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-strong);
  background: rgba(139, 92, 246, 0.24);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

:root[data-theme='light'] {
  --color-bg: #f5f7fb;
  --color-bg-alt: #ffffff;
  --color-surface: rgba(255, 255, 255, 0.96);
  --color-surface-strong: rgba(255, 255, 255, 0.98);
  --color-border: rgba(148, 163, 184, 0.28);
  --color-text: #0f172a;
  /* Revert muted text to original grey */
  --color-muted: #4b5563;
  --color-accent: #6366f1;
  --color-accent-strong: #0ea5e9;
}

:root[data-theme='light'] body {
  background-image: radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.12) 0%, rgba(241, 245, 249, 0) 58%),
    radial-gradient(circle at 85% 15%, rgba(14, 165, 233, 0.15) 0%, rgba(241, 245, 249, 0) 55%),
    linear-gradient(160deg, #f8fafc 0%, #eef2ff 50%, #e0f2fe 100%),
    url('../assets/images/data-network.svg');
  background-size: 620px 620px, 480px 480px, cover, 420px 420px;
  background-position: 0 0, 100% 8%, center, 52% 40%;
  background-repeat: no-repeat, no-repeat, no-repeat, repeat;
  background-blend-mode: screen, screen, normal, soft-light;
}

:root[data-theme='light'] .site-header {
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

:root[data-theme='light'] .hero-subhead {
  color: #4338ca;
}

:root[data-theme='light'] .hero::before {
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.26) 0%, rgba(226, 232, 240, 0) 70%);
}

:root[data-theme='light'] .hero-visual::before {
  background: transparent;
  opacity: 0;
}

:root[data-theme='light'] .hero-visual::after {
  background: radial-gradient(80% 60% at 70% 40%, rgba(99, 102, 241, 0.18) 0%, rgba(14, 165, 233, 0.12) 55%, transparent 80%);
}

:root[data-theme='light'] .resume-link {
  background: rgba(99, 102, 241, 0.12);
  color: #4338ca;
}

:root[data-theme='light'] .detail-meta {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

:root[data-theme='light'] .site-footer {
  background: rgba(255, 255, 255, 0.95);
  border-top: 1px solid rgba(148, 163, 184, 0.28);
}

:root[data-theme='light'] .site-nav-list {
  background: rgba(255, 255, 255, 0.95);
  border-left: 1px solid rgba(148, 163, 184, 0.28);
}

:root[data-theme='light'] .section-alt {
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.92), rgba(226, 240, 254, 0.85));
  backdrop-filter: blur(6px);
}

:root[data-theme='light'] .skill-card,
:root[data-theme='light'] .experience-card,
:root[data-theme='light'] a.project-card,
:root[data-theme='light'] .contact-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.15);
}

:root[data-theme='light'] .tag-chip {
  background: rgba(226, 232, 240, 0.88);
  border-color: rgba(148, 163, 184, 0.4);
  color: #4338ca;
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.18);
}

:root[data-theme='light'] .button.secondary {
  background: rgba(99, 102, 241, 0.14);
  color: #4338ca;
}

:root[data-theme='light'] .theme-toggle {
  background: rgba(99, 102, 241, 0.14);
  border-color: rgba(99, 102, 241, 0.28);
}
.site-nav-list {
  display: flex;
  list-style: none;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

.site-nav-list a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-muted);
  transition: color var(--transition);
}

.site-nav-list a:hover,
.site-nav-list a:focus,
.site-nav-list a.active {
  color: var(--color-text);
}

.resume-link {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(139, 92, 246, 0.18);
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px 0;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Utility: keep text on one line */
.nowrap { white-space: nowrap; }

.section {
  padding: clamp(64px, 11vh, 110px) 0;
}

.section + .section,
.section + .section-alt,
.section-alt + .section,
.section-alt + .section-alt {
  margin-top: -18px;
}

.section-alt {
  padding: clamp(60px, 10vh, 104px) 0;
  background: linear-gradient(120deg, rgba(11, 26, 45, 0.82), rgba(5, 15, 40, 0.88));
  backdrop-filter: blur(8px);
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--color-text);
}

/* Refined display headings: elegant serif with subtle depth */
.display-algerian {
  /* Clean, modern heading font */
  font-family: 'Montserrat', 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  letter-spacing: 0.01em;
  text-transform: none;
  -webkit-text-stroke: 0;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

:root[data-theme='light'] .display-algerian {
  text-shadow: 0 1px 2px rgba(15, 23, 42, 0.1);
}

.display-algerian-underline {
  /* Underlines removed per request */
  text-decoration: none;
}

h1 {
  /* reduce boldness for main heading */
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h2 {
  font-weight: 600;
  font-size: clamp(1.85rem, 3.4vw, 2.4rem);
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: clamp(18px, 4vw, 32px);
}

h3 {
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

p {
  line-height: 1.7;
  margin: 0 0 0.6rem;
}

.hero-subhead {
  font-size: clamp(1.2rem, 1.6vw, 1.4rem);
  font-weight: 600;
  color: var(--color-accent-strong);
  margin-bottom: 0.5rem;
}

.hero {
  position: relative;
  overflow: hidden;
  /* Reduce top space while leaving a small comfortable buffer */
  padding: clamp(8px, 4vh, 40px) 0 clamp(40px, 8vh, 72px);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 8% -16vw auto 32%;
  height: clamp(380px, 56vw, 660px);
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.32) 0%, rgba(5, 8, 22, 0) 70%);
  filter: blur(0);
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(16px, 2.8vw, 56px);
  grid-template-columns: minmax(280px, 1fr);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(420px, 1.35fr) minmax(320px, 1fr);
  }
}

.hero-copy {
  display: grid;
  gap: 0.9rem; /* tighter spacing between hero paragraphs */
  max-width: 68ch;
  justify-items: start; /* keep hero text aligned consistently */
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 3.8vw, 3.4rem);
  letter-spacing: -0.02em;
  text-align: left; /* ensure consistent left alignment across themes */
  line-height: 1.05; /* steady line-height for multi-line name */
  margin: 0.1rem 0 0.3rem; /* trim headline spacing */
}

.hero-copy .lead {
  font-size: clamp(1.12rem, 1.6vw, 1.34rem);
  color: var(--color-muted);
  line-height: 1.78;
  max-width: 100%;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 20px;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  justify-self: center;
  /* Slightly smaller profile photo */
  min-height: clamp(300px, 42vh, 480px);
  max-width: clamp(300px, 30vw, 420px);
  width: 100%;
  isolation: isolate;
  transform: none;
  border-radius: 18px;
  overflow: hidden;
}

@media (min-width: 960px) {
  .hero-visual {
    justify-self: end;
    transform: translateX(-28px);
  }
}

.hero-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: transparent;
  mix-blend-mode: normal;
  opacity: 0;
  z-index: 2;
}

.hero-visual::after {
  content: '';
  position: absolute;
  inset: -16% -20% -16% -28%;
  border-radius: 28px;
  filter: blur(80px);
  background: radial-gradient(80% 60% at 70% 40%, rgba(99, 102, 241, 0.28) 0%, rgba(34, 211, 238, 0.12) 55%, transparent 80%);
  z-index: -2;
}

.hero-photo {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 18px;
  object-fit: cover; /* fill and cover available area */
  object-position: center top; /* keep composition towards top */
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.65);
  filter: saturate(1.02) contrast(1.02);
  z-index: 1;
  /* remove masking so original photo shows */
  -webkit-mask-image: none;
          mask-image: none;
}

.eyebrow {
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
  font-weight: 600;
  color: var(--color-accent);
}

.paragraph-stack {
  display: grid;
  gap: 6px; /* reduce spacing between paragraphs */
  max-width: none;
  width: 100%;
  color: var(--color-muted);
  line-height: 1.7;
}

/* Tighter spacing for About section specifically */
#about .paragraph-stack {
  gap: 6px;
}

.section-intro {
  font-size: 1.06rem;
  color: var(--color-muted);
  max-width: 820px;
  line-height: 1.75;
  margin: clamp(18px, 4vw, 30px) auto clamp(44px, 6vw, 58px);
  text-align: center;
}

/* Slightly increase description text in key sections */
#about .paragraph-stack p,
.timeline-card p,
.community-card p,
.contact-card p {
  /* Slight bump for section descriptions */
  font-size: clamp(1.06rem, 1.2vw, 1.18rem);
}

/* Further increase for requested sections only */
#about .paragraph-stack p,
.experience-card p,
.project-description,
.contact-card p {
  font-size: clamp(1.12rem, 1.25vw, 1.22rem);
}

main .section > .container,
main .section-alt > .container {
  display: grid;
  gap: clamp(24px, 3.2vw, 40px);
  justify-items: stretch;
}

.section .container > h2,
.section-alt .container > h2 {
  justify-content: center;
  text-align: center;
}

.skill-grid {
  display: grid;
  gap: clamp(18px, 2vw, 26px);
  /* Four columns on large screens */
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: 100%;
  align-items: stretch;
}

@media (max-width: 1280px) {
  .skill-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .skill-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .skill-grid {
    grid-template-columns: 1fr;
  }
}

.skill-card {
  padding: clamp(28px, 2.2vw, 36px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(129, 140, 248, 0.35);
  background: linear-gradient(165deg, rgba(18, 26, 52, 0.92), rgba(25, 22, 56, 0.85));
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-rows: var(--skill-header-height) 1fr;
  align-content: start;
  gap: clamp(18px, 2vw, 26px);
  /* Equal height for all skill cards with reduced bottom space */
  height: clamp(580px, 58vh, 640px);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  inset: -55% auto auto -45%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.22), transparent 65%);
  z-index: 0;
  transition: transform var(--transition), opacity var(--transition);
  opacity: 0.75;
}

.skill-card:hover::before {
  opacity: 1;
  transform: translate(12px, 10px);
}

.skill-card > * {
  position: relative;
  z-index: 1;
}

.skill-card h3 {
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  display: grid;
  align-content: center; /* center text within fixed header area */
  justify-items: center; /* center horizontally */
  text-align: center; /* center heading text */
  gap: 14px;
}

/* Decorative heading check icon for skill cards */
.skill-heading-deco {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
  position: relative;
  border: 2.5px solid var(--skill-check);
  box-shadow: 0 8px 18px rgba(14, 20, 40, 0.22);
}

.skill-heading-deco::after {
  content: '';
  position: absolute;
  left: 6.5px;
  top: 6px;
  width: 9px;
  height: 6px;
  border-right: 3px solid var(--skill-check);
  border-bottom: 3px solid var(--skill-check);
  transform: rotate(45deg);
  border-radius: 1px;
}

:root[data-theme='light'] {
  --skill-check: #0b5f2a;
}

.skill-category-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  filter: drop-shadow(0 6px 12px rgba(14, 20, 40, 0.35));
}

.skill-badges {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  /* Start from top; no scrollbars */
  align-content: start;
  /* Smaller breathing room at the bottom of every card */
  padding-bottom: clamp(8px, 1vh, 14px);
}

.skill-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(20, 28, 58, 0.88);
  border: 1px solid rgba(129, 140, 248, 0.24);
  box-shadow: 0 10px 24px rgba(5, 11, 32, 0.32);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  width: 100%;
  overflow: hidden;
  /* Normalize badge height for consistent rows */
  height: 56px;
}

.badge-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.9), rgba(34, 211, 238, 0.75));
  display: inline-flex;
  flex-shrink: 0;
}

.skill-badge:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-strong);
  box-shadow: 0 16px 28px rgba(12, 30, 64, 0.55);
}

.skill-badge img {
  width: 36px;
  height: 36px;
}

.skill-badge span {
  /* Slightly larger labels in Skills */
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  overflow-wrap: anywhere;
}

@media (max-width: 960px) {
  .skill-card {
    /* Let cards grow naturally on smaller screens */
    height: auto;
    min-height: unset;
    grid-template-rows: auto 1fr; /* allow header to grow on small screens */
  }
}

.skill-note {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.55;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: rgba(15, 24, 50, 0.8);
  border: 1px solid rgba(129, 140, 248, 0.22);
}


.timeline-grid {
  display: grid;
  gap: clamp(18px, 2vw, 26px);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  width: 100%;
  align-items: stretch;
}

.timeline-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(129, 140, 248, 0.32);
  background: linear-gradient(160deg, rgba(16, 24, 52, 0.94), rgba(28, 28, 66, 0.82));
  box-shadow: var(--shadow-md);
  display: grid;
  gap: 18px;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.timeline-card::after {
  content: '';
  position: absolute;
  inset: auto -35% -40% auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.28), transparent 70%);
  z-index: -1;
}

.timeline-header h3 {
  margin: 0;
  font-size: 1.2rem;
}

.timeline-role {
  display: block;
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-top: 6px;
}

.timeline-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.detail-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.detail-pill {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.22), rgba(34, 211, 238, 0.16));
  border: 1px solid rgba(129, 140, 248, 0.35);
  font-size: 0.85rem;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.detail-list {
  display: grid;
  gap: 0.6rem;
  padding-left: 1.2rem;
  margin: 0;
  color: var(--color-muted);
  line-height: 1.6;
}

.detail-list li {
  position: relative;
  list-style: none;
}

.detail-list li::before {
  content: '';
  position: absolute;
  left: -1.2rem;
  top: 0.55rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.9), rgba(34, 211, 238, 0.7));
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.45);
}

.experience-grid {
  display: grid;
  gap: clamp(18px, 2vw, 26px);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  width: 100%;
  align-items: stretch;
}

.experience-card {
  padding: 40px 32px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(15, 20, 42, 0.92), rgba(25, 28, 62, 0.88));
  border: 1px solid rgba(129, 140, 248, 0.32);
  box-shadow: 0 20px 46px rgba(8, 13, 34, 0.45);
  display: grid;
  gap: 20px;
  position: relative;
  overflow: hidden;
  height: 100%;
}

.experience-card > * {
  position: relative;
  z-index: 1;
}

.experience-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.75), rgba(34, 211, 238, 0.6));
}

.experience-card::after {
  content: '';
  position: absolute;
  inset: auto -32% -45% auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.24), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
}

.experience-card:hover::after {
  opacity: 1;
  transform: translate(-8px, -6px);
}

.experience-card h3 {
  margin: 0;
  font-size: 1.18rem;
  display: block; /* center the heading text */
  text-align: center;
}

.experience-card h3::after {
  content: none; /* remove trailing line */
  display: none;
}

.experience-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-muted);
  justify-content: center; /* center meta chips */
  text-align: center;
}

.experience-meta span {
  background: rgba(20, 30, 56, 0.85);
  border: 1px solid rgba(129, 140, 248, 0.22);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  padding: 0;
  margin: 0;
  justify-content: center; /* center tag chips */
}

.tag-chip {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: rgba(24, 32, 62, 0.85);
  border: 1px solid rgba(129, 140, 248, 0.28);
  color: var(--color-accent);
  font-size: 0.85rem;
  letter-spacing: 0.01em;
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.15);
}

.project-gallery {
  display: grid;
  gap: clamp(18px, 2vw, 28px);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  width: 100%;
  align-items: stretch;
}

a.project-card {
  display: grid;
  gap: 20px;
  padding: 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(17, 26, 54, 0.95), rgba(35, 23, 64, 0.8));
  border: 1px solid rgba(129, 140, 248, 0.28);
  box-shadow: var(--shadow-md);
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  height: 100%;
}

a.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-accent-strong);
  box-shadow: 0 20px 55px rgba(8, 47, 73, 0.55);
}

a.project-card::before {
  content: '';
  position: absolute;
  inset: -40% auto auto -30%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
  z-index: -1;
}

a.project-card:hover::before {
  opacity: 1;
  transform: translate(12px, 8px);
}

.project-thumb {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  /* Ensure all project images share the same aspect ratio */
  aspect-ratio: 16 / 9;
}

.project-thumb img {
  border-radius: var(--radius-md);
  transition: transform var(--transition);
  width: 100%;
  height: 100%;
  object-fit: cover; /* uniform alignment and crop */
  object-position: center;
}

a.project-card:hover .project-thumb img {
  transform: scale(1.03);
}

.project-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.project-meta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.project-description {
  color: var(--color-muted);
  line-height: 1.6;
}

.project-highlights {
  display: grid;
  gap: 0.6rem;
  padding-left: 1.2rem;
  margin: 0;
  color: var(--color-muted);
  line-height: 1.6;
}

.project-highlights li {
  list-style: none;
  position: relative;
}

.project-highlights li::before {
  content: '';
  position: absolute;
  left: -1.1rem;
  top: 0.6rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.9);
  box-shadow: 0 0 8px rgba(14, 165, 233, 0.5);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.project-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--color-accent);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border-radius: 999px;
  padding: 0.85rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid rgba(129, 140, 248, 0.3);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.button-icon {
  width: 20px;
  height: 20px;
}

.button span {
  display: inline-flex;
  align-items: center;
}

.button.primary,
.button.secondary {
  /* Unified light color for all buttons */
  background: rgba(99, 102, 241, 0.14);
  color: var(--color-accent);
  border-color: rgba(129, 140, 248, 0.28);
}

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

.contact-card {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
  align-items: center;
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(129, 140, 248, 0.3);
  background: linear-gradient(160deg, rgba(18, 26, 52, 0.94), rgba(32, 24, 68, 0.86));
  box-shadow: var(--shadow-md);
  width: 100%;
}

.contact-card p {
  color: var(--color-muted);
  line-height: 1.65;
}

.contact-actions {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.contact-actions .button {
  justify-content: flex-start;
}

.contact-meta {
  display: grid;
  gap: 10px;
  margin: 28px 0 0;
  font-size: 0.95rem;
}

.contact-meta div {
  display: grid;
  gap: 4px;
}

.contact-meta dt {
  font-weight: 600;
  color: var(--color-text);
}

.contact-meta dd {
  margin: 0;
  color: var(--color-muted);
}

.contact-meta a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.signature-quote {
  margin: 36px 0 0;
  padding-left: 24px;
  border-left: 3px solid rgba(99, 102, 241, 0.65);
  color: var(--color-muted);
  font-style: italic;
  line-height: 1.6;
}

.community-card {
  display: grid;
  gap: 18px;
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(129, 140, 248, 0.3);
  background: linear-gradient(150deg, rgba(16, 26, 54, 0.94), rgba(28, 24, 66, 0.84));
  box-shadow: var(--shadow-md);
  width: 100%;
}

.site-footer {
  padding: 40px 0;
  border-top: 1px solid rgba(129, 140, 248, 0.25);
  background: rgba(7, 11, 28, 0.9);
}

.site-footer p {
  margin: 0;
  color: var(--color-muted);
  text-align: center;
}

.detail-header {
  padding-top: 140px;
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.detail-hero {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: start;
  margin-bottom: 64px;
}

.detail-summary {
  display: grid;
  gap: 16px;
  color: var(--color-muted);
  line-height: 1.7;
}

.detail-meta {
  display: grid;
  gap: 12px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(18, 26, 52, 0.9), rgba(32, 24, 68, 0.82));
  border: 1px solid rgba(129, 140, 248, 0.28);
  box-shadow: var(--shadow-md);
}

.detail-meta dt {
  font-weight: 600;
  color: var(--color-text);
}

.detail-meta dd {
  margin: 0;
  color: var(--color-muted);
}

.detail-section {
  margin-bottom: 56px;
}

.detail-section h2 {
  margin-bottom: 18px;
}

.detail-section ul {
  padding-left: 20px;
  color: var(--color-muted);
  line-height: 1.7;
}

@media (max-width: 900px) {
  .container {
    padding: 0 6vw;
  }

  .site-nav-list {
    position: fixed;
    inset: 0 0 auto auto;
    width: min(74vw, 320px);
    flex-direction: column;
    background: rgba(7, 11, 28, 0.97);
    border-left: 1px solid rgba(139, 92, 246, 0.22);
    padding: 88px 24px 24px;
    gap: 1.25rem;
    transform: translateX(105%);
    transition: transform var(--transition);
    min-height: 100vh;
  }

  .site-nav-list[data-open='true'] {
    transform: translateX(0);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-actions {
    gap: 0.9rem;
  }

  .nav-actions .theme-toggle {
    flex-shrink: 0;
  }

  .project-gallery {
    grid-template-columns: 1fr;
  }

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

  .section-intro {
    margin: 0 0 36px;
  }

  .community-card {
    padding: 28px;
  }

  .hero-visual {
    transform: none;
    margin: 0 auto;
  }
}

@media (max-width: 600px) {
  h2::after {
    width: 4px;
  }

  .skill-card h3::after {
    display: none;
  }
}

@media (max-width: 720px) {
  .experience-card h3::after {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}


:root[data-theme='light'] .skill-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

:root[data-theme='light'] .skill-badge {
  background: rgba(226, 232, 240, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.1);
}

:root[data-theme='light'] .skill-badge span {
  color: #0f172a;
}

:root[data-theme='light'] .skill-note {
  color: #475569;
  background: rgba(226, 232, 240, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.35);
}


:root[data-theme='light'] .skill-badge img {
  filter: none;
}

:root[data-theme='light'] .badge-dot {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.85), rgba(14, 165, 233, 0.68));
}

:root[data-theme='light'] .timeline-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.12);
}

:root[data-theme='light'] .detail-pill {
  background: rgba(226, 232, 240, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.45);
  color: #1f2937;
}

:root[data-theme='light'] .detail-list li::before {
  background: rgba(99, 102, 241, 0.9);
}

:root[data-theme='light'] .experience-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.32);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.14);
}

:root[data-theme='light'] .experience-card::before {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.65), rgba(14, 165, 233, 0.5));
}

:root[data-theme='light'] .experience-meta span {
  background: rgba(226, 232, 240, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: #1e293b;
}

:root[data-theme='light'] .tag-chip {
  background: rgba(226, 232, 240, 0.88);
  border-color: rgba(148, 163, 184, 0.4);
  color: #4338ca;
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.18);
}

:root[data-theme='light'] .community-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.14);
}

:root[data-theme='light'] .signature-quote {
  border-left-color: rgba(99, 102, 241, 0.45);
  color: #475569;
}

:root[data-theme='light'] .project-highlights li::before {
  background: rgba(99, 102, 241, 0.85);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.35);
}


:root[data-theme='light'] .button.primary,
:root[data-theme='light'] .button.secondary {
  /* Same unified light color in light mode */
  background: rgba(99, 102, 241, 0.14);
  color: #4338ca;
  border-color: rgba(99, 102, 241, 0.25);
}

:root[data-theme='light'] .resume-link {
  color: #4338ca;
  border-color: rgba(99, 102, 241, 0.28);
}

:root[data-theme='light'] .project-card {
  border-color: rgba(148, 163, 184, 0.28);
}

:root[data-theme='light'] .theme-icon {
  filter: none;
}


:root[data-theme='light'] .skill-badge:hover {
  border-color: rgba(99, 102, 241, 0.6);
  transform: translateY(-2px);
}