/*
 * styles.css — Portfolio Huỳnh Nguyên Bảo
 *
 * MỤC LỤC (Ctrl+F tên section):
 * :root              → màu, font, khoảng cách (đổi theme tại đây)
 * .bg-blob           → vòng mờ nền
 * .glass            → hiệu ứng kính mờ (dùng chung nhiều thẻ)
 * .site-header      → menu cố định trên cùng
 * .landing          → section #landing + khung ảnh
 * .btn              → nút primary / ghost
 * .about-*          → section #about
 * .timeline-card    → section #experience
 * .project-card     → section #projects
 * .contact-*        → section #contact
 * .site-footer      → chân trang
 * @media mobile     → responsive
 * Animations        → .reveal, .stagger (kết hợp main.js)
 */

/* :root — biến thiết kế toàn site (Glassmorphism) */
:root {
  --color-primary: #1856ff;
  --color-secondary: #3a344e;
  --color-success: #07ca6b;
  --color-warning: #e89558;
  --color-danger: #ea2143;
  --color-surface: #ffffff;
  --color-text: #141414;
  --color-text-muted: #5c5c6a;
  --font-sans: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.75);
  --glass-shadow: 0 8px 32px rgba(24, 86, 255, 0.08);
  --header-h: 72px;
  /* Khoảng trống khi nhảy anchor — header fixed + top + đệm */
  --scroll-offset: calc(var(--header-h) + var(--space-md) + var(--space-sm));
  --max-width: 1120px;
}

#landing,
.section[id] {
  scroll-margin-top: var(--scroll-offset);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: linear-gradient(145deg, #eef2ff 0%, #f8f9fc 40%, #e8ecf8 100%);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* .bg-blob — vòng màu blur cố định phía sau nội dung (index: .bg-blob--1/2/3) */
.bg-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
}

.bg-blob--1 {
  width: 420px;
  height: 420px;
  top: -120px;
  right: -80px;
  background: rgba(24, 86, 255, 0.25);
}

.bg-blob--2 {
  width: 360px;
  height: 360px;
  bottom: 10%;
  left: -100px;
  background: rgba(58, 52, 78, 0.15);
}

.bg-blob--3 {
  width: 280px;
  height: 280px;
  top: 40%;
  right: 15%;
  background: rgba(7, 202, 107, 0.12);
}

/* .glass — panel kính mờ: thêm class "glass" vào thẻ HTML cần hiệu ứng */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

.label-caps {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

/* .site-header — thanh menu cố định; .is-scrolled do main.js khi cuộn */
.site-header {
  position: fixed;
  top: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  width: min(calc(100% - 32px), var(--max-width));
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-xl);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid rgba(24, 86, 255, 0.22);
  background: rgba(24, 86, 255, 0.06);
  box-shadow:
    0 10px 28px rgba(24, 86, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.lang-switch__btn {
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  border: 0;
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-weight: 800;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.lang-switch__btn:hover {
  color: var(--color-primary);
}

.lang-switch__btn.is-active,
.lang-switch__btn[aria-pressed="true"] {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(24, 86, 255, 0.28);
}

.lang-switch__btn:active {
  transform: translateY(1px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.logo:hover .logo__text {
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.site-nav .lang-switch {
  margin-left: 6px;
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition:
    transform 0.2s,
    opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Layout — .section chung: max-width, padding cho mọi section (about, experience, ...) */
main {
  padding-top: 0;
}

/* #landing — màn chào: chữ trái + khung R4X Bot (ảnh profile) + stat */
.landing {
  --landing-stage-size: clamp(280px, 42vw, 480px);
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  margin-bottom: var(--space-2xl);
  padding: calc(var(--header-h) + var(--space-lg)) var(--space-md)
    calc(var(--space-2xl) + 52px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
}

.landing__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  pointer-events: none;
  z-index: 0;
}

.landing__orb--1 {
  width: 360px;
  height: 360px;
  top: 8%;
  left: -8%;
  background: rgba(24, 86, 255, 0.22);
}

.landing__orb--2 {
  width: 320px;
  height: 320px;
  right: -6%;
  bottom: 12%;
  background: rgba(7, 202, 107, 0.14);
}

.landing__wrap {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 8px), var(--max-width));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.landing__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--landing-stage-size);
  gap: clamp(var(--space-lg), 4vw, var(--space-2xl));
  align-items: center;
  min-width: 0;
}

.landing__copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 36rem;
  min-width: 0;
}

.landing__badge {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 10px;
  padding: 8px 14px 8px 10px;
  border-radius: 999px;
}

.landing__badge-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px rgba(7, 202, 107, 0.25);
}

.landing__badge-text {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.landing__title {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow: visible;
}

.landing__title-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.landing__title-name {
  display: block;
  font-size: clamp(2.35rem, 6.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.045em;
  color: var(--color-text);
  padding-bottom: 0.08em;
}

.landing__lead {
  margin: 0;
  max-width: 42ch;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2.2vw, 1.0625rem);
  line-height: 1.55;
}

.landing__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.landing__stack li {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-secondary);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  box-shadow: 0 2px 12px rgba(24, 86, 255, 0.06);
}

.landing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.landing__cta {
  gap: 8px;
}

.landing__cta-icon {
  transition: transform 0.2s ease;
}

.landing__cta:hover .landing__cta-icon {
  transform: translateX(3px);
}

.landing__stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  width: var(--landing-stage-size);
  justify-self: end;
}

.landing__frame {
  width: 100%;
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius-xl);
  box-shadow:
    var(--glass-shadow),
    0 24px 64px rgba(24, 86, 255, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
}

.landing__frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.65);
}

.landing__frame-dots {
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #ff5f57;
  box-shadow:
    15px 0 0 #febc2e,
    30px 0 0 #28c840;
}

.landing__frame-label {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.6875rem;
}

.landing__canvas {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(160deg, #f0f4ff 0%, #fafbfd 55%, #eef2ff 100%);
}

.landing__canvas .landing__avatar {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center 20%;
}

.landing__scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  z-index: 2;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px 10px 16px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition:
    color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.landing__scroll:hover {
  text-decoration: none;
  color: var(--color-primary);
  box-shadow: 0 12px 32px rgba(24, 86, 255, 0.14);
}

.landing__scroll-chevron {
  display: block;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}

@media (min-width: 900px) {
  .landing__shell {
    grid-template-columns: minmax(0, 1.05fr) var(--landing-stage-size);
  }
}

@media (max-width: 899px) {
  .landing {
    --landing-stage-size: min(100%, 400px);
    align-items: flex-start;
    padding-top: calc(var(--header-h) + var(--space-md));
  }

  .landing__shell {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .landing__copy {
    max-width: none;
    text-align: center;
    align-items: center;
  }

  .landing__badge {
    align-self: center;
  }

  .landing__lead {
    max-width: 40ch;
  }

  .landing__stack {
    justify-content: center;
  }

  .landing__actions {
    justify-content: center;
  }

  .landing__stage {
    order: -1;
    width: 100%;
    max-width: 400px;
    justify-self: center;
  }

  .landing__orb--1 {
    top: 32%;
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    height: 280px;
  }
}

.section {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto var(--space-2xl);
}

/* .section__header — cùng nhịp typography với .landing__title */
.section__header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  margin-bottom: var(--space-xl);
}

.section__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.section__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(2rem, 5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
  color: var(--color-text);
}

.section__header--inline {
  gap: var(--space-sm);
  margin-bottom: 0;
}

.section__header--inline .section__title {
  font-size: clamp(1.75rem, 4vw, 2.125rem);
}

.section__header--inline .contact-wrap__lead {
  margin: 0;
  max-width: 42ch;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

/* .btn — nút: .btn--primary (xanh), .btn--ghost (viền), .btn--sm (nhỏ trong thẻ dự án) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--space-lg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    background 0.2s,
    color 0.2s,
    border-color 0.2s,
    transform 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn--primary:hover {
  background: #1245d4;
  color: #fff;
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.6);
  color: var(--color-text);
  border-color: var(--glass-border);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--sm {
  min-height: 40px;
  padding: 0 var(--space-md);
  font-size: 0.875rem;
}

.btn--block {
  width: 100%;
}

/* #about — lưới .about-card / .tag-list kỹ năng */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.about-card {
  padding: var(--space-lg);
}

.about-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
}

.about-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.about-card--wide {
  grid-column: 1 / -1;
}

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag-list li {
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  background: rgba(24, 86, 255, 0.08);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
}

/* #experience — thẻ .timeline-card thực tập G1Mart */
.timeline-card {
  padding: var(--space-xl);
}

.timeline-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.timeline-card__meta time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.timeline-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.375rem;
}

.timeline-card p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  transition:
    color 0.2s ease,
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.link-arrow::after {
  content: " →";
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.link-arrow:hover {
  text-decoration: none;
  transform: translateX(6px);
  color: var(--color-primary);
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

.timeline-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.project-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
}

/* #projects — lưới .bento chứa các .project-card + .demo-credentials */
.bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.project-card {
  position: relative;
  z-index: 0;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: 0;
}

.project-card--featured {
  grid-column: 1 / -1;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.7) 0%,
    rgba(24, 86, 255, 0.06) 100%
  );
}

.project-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.project-card__badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-secondary);
}

.project-card__role {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 4px 10px;
  background: rgba(24, 86, 255, 0.1);
  border-radius: var(--radius-sm);
}

.timeline-card__role {
  margin: 0 0 var(--space-sm);
  color: var(--color-primary);
}

.timeline-card__leadership {
  margin-bottom: var(--space-md);
}

.timeline-card__leadership-title {
  margin: 0 0 var(--space-md);
  color: var(--color-primary);
}

.timeline-card__duty-heading {
  margin: var(--space-md) 0 var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.timeline-card__duty-heading:first-of-type {
  margin-top: 0;
}

.timeline-card__duty-en {
  display: block;
  margin-top: 2px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.timeline-card__duties {
  margin: 0 0 var(--space-sm);
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.timeline-card__duties li + li {
  margin-top: var(--space-sm);
}

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

.project-card__subtitle {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.project-card p {
  flex: 1;
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.project-card__tags span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 4px 8px;
  background: rgba(58, 52, 78, 0.08);
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
}

.project-card .btn {
  align-self: flex-start;
  margin-top: var(--space-sm);
}

.project-card__actions .btn {
  margin-top: 0;
}

.demo-credentials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
}

@media (min-width: 560px) {
  .demo-credentials-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.demo-credentials {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid rgba(24, 86, 255, 0.15);
  background: rgba(24, 86, 255, 0.04);
}

.demo-credentials-grid .demo-credentials {
  margin-top: 0;
}

.demo-credentials__label {
  margin: 0 0 var(--space-sm);
  color: var(--color-primary);
}

.demo-credentials__list {
  margin: 0;
  display: grid;
  gap: var(--space-sm);
}

.demo-credentials__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-sm);
}

.demo-credentials__row dt {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.demo-credentials__row dd {
  margin: 0;
}

.demo-credentials code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: rgba(58, 52, 78, 0.08);
  color: var(--color-text);
}

/* #contact — khối liên hệ: .contact-wrap, .contact-list */
.section--contact {
  margin-bottom: var(--space-xl);
}

.contact-wrap {
  padding: var(--space-xl);
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .contact-wrap {
    grid-template-columns: 1fr auto;
    align-items: end;
  }

  .section__header--inline {
    margin-bottom: 0;
  }

  .contact-wrap .btn--block {
    grid-column: 1 / -1;
  }
}

.contact-wrap__lead {
  margin: var(--space-sm) 0 0;
  color: var(--color-text-muted);
  max-width: 40ch;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  width: 100%;
}

@media (min-width: 768px) {
  .contact-list {
    width: auto;
    min-width: 320px;
    max-width: 360px;
    align-self: end;
  }
}

.contact-list__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: 0;
  padding: var(--space-md) var(--space-xl);
  background: rgba(24, 86, 255, 0.1);
  border: 1px solid rgba(24, 86, 255, 0.18);
  border-radius: var(--radius-md);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.contact-list__item:nth-child(2) {
  background: rgba(58, 52, 78, 0.08);
  border-color: rgba(58, 52, 78, 0.14);
}

.contact-list a {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.35;
  word-break: break-word;
}

.contact-list a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* .site-footer — dòng copyright cuối trang */
.site-footer {
  text-align: center;
  padding: var(--space-lg);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer p {
  margin: 0;
}

/* Mobile — giao diện ≤768px: menu hamburger, landing xếp dọc */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    flex-direction: column;
    padding: var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition:
      opacity 0.2s,
      transform 0.2s,
      visibility 0.2s;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .about-grid,
  .contact-wrap .btn--block {
    grid-column: 1 / -1;
  }
}

/* Animations — .reveal / .stagger: main.js thêm .is-visible khi scroll tới */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

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

@keyframes header-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes blob-drift {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(28px, -20px) scale(1.05);
  }

  66% {
    transform: translate(-16px, 12px) scale(0.96);
  }
}

@keyframes scroll-bounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(5px);
  }
}

@keyframes badge-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 3px rgba(7, 202, 107, 0.25);
    opacity: 1;
  }

  50% {
    box-shadow: 0 0 0 6px rgba(7, 202, 107, 0.12);
    opacity: 0.85;
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    box-shadow: var(--glass-shadow);
  }

  50% {
    box-shadow:
      0 12px 48px rgba(24, 86, 255, 0.2),
      0 0 0 1px rgba(24, 86, 255, 0.08);
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% center;
  }

  100% {
    background-position: 200% center;
  }
}

@keyframes btn-shine {
  0% {
    left: -120%;
  }

  18%,
  100% {
    left: 140%;
  }
}

@keyframes fade-scale-in {
  from {
    opacity: 0;
    transform: scale(0.88);
  }

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

@keyframes slide-in-left {
  from {
    opacity: 0;
    transform: translateX(-28px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* .scroll-progress — thanh xanh trên cùng; width % do main.js khi cuộn */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.35);
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    #5b8cff,
    var(--color-success)
  );
  box-shadow: 0 0 12px rgba(24, 86, 255, 0.45);
  transition: width 0.08s linear;
}

@media (prefers-reduced-motion: no-preference) {
  :root {
    --pointer-x: 0;
    --pointer-y: 0;
  }

  .bg-blob--1 {
    animation: blob-drift 20s ease-in-out infinite;
  }

  .bg-blob--2 {
    animation: blob-drift 26s ease-in-out infinite reverse;
  }

  .bg-blob--3 {
    animation: blob-drift 18s ease-in-out infinite;
    animation-delay: -4s;
  }

  .site-header {
    animation: header-in 0.65s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    transition:
      box-shadow 0.35s ease,
      border-color 0.35s ease;
  }

  .site-header.is-scrolled {
    box-shadow: 0 10px 36px rgba(24, 86, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.92);
  }

  .landing__badge {
    animation: fade-up 0.6s cubic-bezier(0.22, 1, 0.36, 1) backwards;
  }

  .landing__badge-dot {
    animation: badge-pulse 2.4s ease-in-out infinite;
  }

  .landing__title-eyebrow,
  .landing__title-name,
  .landing__lead,
  .landing__stack,
  .landing__actions {
    animation: fade-up 0.7s cubic-bezier(0.22, 1, 0.36, 1) backwards;
  }

  .landing__title-eyebrow {
    animation-delay: 0.06s;
  }

  .landing__title-name {
    animation:
      fade-up 0.75s cubic-bezier(0.22, 1, 0.36, 1) 0.12s backwards,
      gradient-shift 6s linear 1s infinite;
    background: linear-gradient(
      120deg,
      var(--color-text) 0%,
      var(--color-primary) 42%,
      #5b8cff 58%,
      var(--color-text) 100%
    );
    background-size: 200% auto;
    background-position: 0% 50%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    /* Tránh cắt chân chữ (ỳ, ệ, g…) khi dùng background-clip: text */
    line-height: 1.15;
    padding-bottom: 0.1em;
  }

  .landing__lead {
    animation-delay: 0.2s;
  }

  .landing__stack {
    animation-delay: 0.28s;
  }

  .landing__actions {
    animation-delay: 0.36s;
  }

  .landing__frame {
    animation:
      fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.15s backwards,
      glow-pulse 5s ease-in-out 1.4s infinite;
    transform: perspective(900px) rotateX(calc(var(--pointer-y) * -2deg))
      rotateY(calc(var(--pointer-x) * 2deg));
    transition: transform 0.2s ease-out;
  }

  .landing__scroll {
    animation:
      fade-up 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.55s backwards,
      scroll-bounce 2.2s ease-in-out 1.2s infinite;
  }

  .landing__scroll:hover {
    transform: translateX(-50%) translateY(-3px);
  }

  .btn--primary {
    position: relative;
    overflow: hidden;
  }

  .btn--primary::before {
    content: "";
    position: absolute;
    top: 0;
    left: -120%;
    width: 45%;
    height: 100%;
    background: linear-gradient(
      90deg,
      transparent,
      rgba(255, 255, 255, 0.4),
      transparent
    );
    animation: btn-shine 2.8s ease-in-out infinite;
    pointer-events: none;
  }

  .site-nav a {
    position: relative;
    transition: color 0.2s ease;
  }

  .site-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 6px;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease;
  }

  .site-nav a:hover::after,
  .site-nav a.is-active::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .btn--primary:hover {
    box-shadow: 0 8px 24px rgba(24, 86, 255, 0.35);
  }

  .about-card,
  .project-card,
  .timeline-card,
  .contact-wrap,
  .demo-credentials {
    transition:
      transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
      box-shadow 0.35s ease;
  }

  .about-card:hover,
  .timeline-card:hover,
  .contact-wrap:hover {
    transform: translateY(-5px);
    box-shadow: 0 14px 44px rgba(24, 86, 255, 0.14);
  }

  .project-card:hover {
    z-index: 2;
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(24, 86, 255, 0.14);
  }

  .demo-credentials:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(24, 86, 255, 0.1);
  }

  html.js-enabled .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition:
      opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
      transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--reveal-delay, 0ms);
  }

  html.js-enabled .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  html.js-enabled .bento .reveal--scale {
    transform: translateY(24px);
    opacity: 0;
  }

  html.js-enabled .bento .reveal--scale.is-visible {
    transform: translateY(0);
    opacity: 1;
  }

  html.js-enabled .reveal--left {
    transform: translateX(-36px);
    opacity: 0;
  }

  html.js-enabled .reveal--left.is-visible {
    transform: translateX(0);
    opacity: 1;
  }

  html.js-enabled .section__header .section__eyebrow {
    opacity: 0;
    transform: translateY(6px);
    transition:
      opacity 0.45s ease,
      transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: calc(var(--reveal-delay, 0ms) + 30ms);
  }

  html.js-enabled .section__header .section__title {
    opacity: 0;
    transform: translateY(12px);
    transition:
      opacity 0.5s ease,
      transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: calc(var(--reveal-delay, 0ms) + 90ms);
  }

  html.js-enabled .section__header.is-visible .section__eyebrow,
  html.js-enabled .section__header.is-visible .section__title {
    opacity: 1;
    transform: translateY(0);
  }

  html.js-enabled .stagger-group:not(.is-visible) .stagger-item {
    opacity: 0;
    transform: translateY(18px) scale(0.96);
  }

  html.js-enabled .stagger-group.is-visible .stagger-item {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition:
      opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
      transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--stagger-delay, 0ms);
  }

  .project-card__tags span,
  .tag-list li {
    transition:
      transform 0.25s ease,
      background 0.25s ease;
  }

  .project-card:hover .project-card__tags span,
  .about-card:hover .tag-list li {
    transform: translateY(-2px) scale(1.04);
  }

  .project-card__badge,
  .project-card__role {
    transition: transform 0.3s ease;
  }

  .project-card:hover .project-card__badge {
    transform: scale(1.05);
  }

  .timeline-card__leadership-title {
    animation: slide-in-left 0.6s cubic-bezier(0.22, 1, 0.36, 1) backwards;
    animation-delay: calc(var(--reveal-delay, 0ms) + 180ms);
  }

  .timeline-card.is-visible .timeline-card__duty-heading {
    animation: fade-up 0.55s cubic-bezier(0.22, 1, 0.36, 1) backwards;
    animation-delay: calc(var(--reveal-delay, 0ms) + var(--duty-delay, 0ms));
  }

  .demo-credentials-grid.is-visible .demo-credentials {
    animation: fade-scale-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) backwards;
    animation-delay: var(--stagger-delay, 0ms);
  }

  .site-footer {
    opacity: 0;
    transform: translateY(16px);
    transition:
      opacity 0.6s ease,
      transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .site-footer.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  .contact-list__item {
    transition: transform 0.25s ease;
  }

  .contact-list__item:hover {
    transform: translateX(6px);
  }

  code {
    transition:
      background 0.2s ease,
      transform 0.2s ease;
  }

  .demo-credentials:hover code {
    transform: scale(1.03);
  }
}