/* ==========================================================================
   Variables & reset
   ========================================================================== */

:root {
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-accent: #0f766e;
  --color-accent-hover: #115e59;
  --color-accent-soft: #f0fdfa;
  --color-accent-border: #99f6e4;
  --color-code-kw: #2dd4bf;
  --color-error: #dc2626;
  --color-success: #059669;

  --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", Consolas, "Courier New", monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 8px 24px rgba(15, 23, 42, 0.1);

  --header-height: 72px;
  --container-max: 1120px;
  --section-gap: 5rem;
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul {
  list-style: none;
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.section {
  padding-block: var(--section-gap);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section__header {
  margin-bottom: 3rem;
  text-align: center;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section__lead {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  max-width: 36rem;
  margin-inline: auto;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.5rem;
  min-height: 48px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

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

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

/* ==========================================================================
   Header & navigation
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-text);
  transition: transform var(--transition);
}

.header__logo:hover {
  color: var(--color-text);
  transform: translateY(-1px);
}

.header__logo-mark {
  flex-shrink: 0;
  display: flex;
  filter: drop-shadow(0 1px 3px rgba(15, 118, 110, 0.18));
  transition: filter var(--transition), transform var(--transition);
}

.header__logo:hover .header__logo-mark {
  filter: drop-shadow(0 3px 10px rgba(15, 118, 110, 0.28));
  transform: scale(1.05);
}

.header__logo-svg {
  width: 2.375rem;
  height: 2.375rem;
  display: block;
}

.header__logo-bg {
  fill: var(--color-accent-soft);
}

.header__logo-bracket {
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
  transition: stroke var(--transition);
}

.header__logo-a {
  fill: var(--color-text);
  transition: fill var(--transition);
}

.header__logo-cursor {
  fill: var(--color-accent);
  animation: logo-cursor-blink 2.4s step-end infinite;
  transition: fill var(--transition);
}

.header__logo:hover .header__logo-bracket {
  stroke: var(--color-accent-hover);
}

.header__logo:hover .header__logo-cursor {
  fill: var(--color-code-kw);
}

.header__logo:hover .header__logo-a {
  fill: var(--color-accent-hover);
}

@keyframes logo-cursor-blink {
  0%, 42% { opacity: 1; }
  46%, 100% { opacity: 0.2; }
}

.header__logo-text {
  display: flex;
  align-items: baseline;
  line-height: 1;
}

.header__logo-name {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}

.header__logo-suffix {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: -0.04em;
  transition: color var(--transition);
}

.header__logo:hover .header__logo-suffix {
  color: var(--color-code-kw);
}

.nav__list {
  display: flex;
  gap: 2rem;
}

.nav__link {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-accent);
}

.header__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}

.header__burger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

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

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

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

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding-top: calc(var(--section-gap) + 1rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__grid > * {
  min-width: 0;
}

.hero__eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  max-width: 34rem;
}

.hero__text {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  max-width: 34rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__visual {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  min-width: 0;
}

/* Code window */
.code-window {
  background: #1e293b;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
}

.code-window__bar {
  display: flex;
  gap: 6px;
  padding: 0.75rem 1rem;
  background: #0f172a;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.code-window__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #475569;
}

.code-window__dot:nth-child(1) { background: #ef4444; }
.code-window__dot:nth-child(2) { background: #eab308; }
.code-window__dot:nth-child(3) { background: #22c55e; }

.code-window__body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.65;
  color: #e2e8f0;
  overflow-x: auto;
  margin: 0;
}

.code-cmt { color: #64748b; }
.code-kw { color: var(--color-code-kw); }
.code-str { color: #86efac; }

/* ==========================================================================
   Profil
   ========================================================================== */

.profil {
  display: flex;
  align-items: center;
  gap: 3rem;
  padding: 2.5rem 3rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.profil:hover {
  box-shadow: var(--shadow-md);
}

.profil__media {
  flex-shrink: 0;
  width: 200px;
  text-align: center;
}

.profil__photo-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 1rem;
}

.profil__photo {
  width: 100%;
  aspect-ratio: 5 / 6;
  background: url("assets/anthony-portrait.jpg") center top / cover no-repeat;
}

.profil__name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

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

.profil__content {
  flex: 1;
  min-width: 0;
}

.profil__content p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}

/* ==========================================================================
   Approche
   ========================================================================== */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skills-grid--approach {
  grid-template-columns: repeat(3, 1fr);
}

.skills-grid--approach .badge {
  background: var(--color-accent-soft);
  border-color: var(--color-accent-border);
  color: var(--color-accent-hover);
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

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

.skill-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

/* Accordion details/summary */
details.skill-card {
  padding: 0;
}

details.skill-card > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
}

details.skill-card > summary::-webkit-details-marker {
  display: none;
}

.skill-card__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.skill-card__summary:hover {
  background: var(--color-bg-alt);
}

details[open] .skill-card__summary {
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

details.skill-card .skill-card__title {
  margin-bottom: 0;
}

.skill-card__chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  transition: transform 0.25s ease;
}

.skill-card__chevron::before {
  content: "";
  display: block;
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.25s ease;
}

details[open] .skill-card__chevron::before {
  transform: rotate(-135deg) translateY(-2px);
}

details.skill-card .badge-list {
  padding: 1.25rem 1.5rem 1.5rem;
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
}

.badge--tech {
  background: var(--color-accent-soft);
  border-color: var(--color-accent-border);
  color: var(--color-accent-hover);
  font-size: 0.75rem;
}

/* ==========================================================================
   Projets
   ========================================================================== */

.projects-grid {
  --project-card-collapsed-min: 10.25rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  align-items: start;
}

.projects-grid:has(.project-card:nth-child(5)) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  min-width: 0;
  overflow: hidden;
}

.project-card__details {
  display: flex;
  flex-direction: column;
  flex: 1;
  height: 100%;
}

.project-card__details:not([open]) .project-card__summary {
  height: var(--project-card-collapsed-min);
  min-height: var(--project-card-collapsed-min);
  box-sizing: border-box;
}

.project-card__summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.5rem;
  cursor: pointer;
  user-select: none;
}

.project-card__summary::-webkit-details-marker {
  display: none;
}

.project-card__summary::marker {
  content: "";
}

.project-card__summary:hover .project-card__title {
  color: var(--color-accent);
}

.project-card__summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.project-card__header {
  flex: 1;
  min-width: 0;
}

.project-card__toggle {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  margin-top: 0.1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  position: relative;
  transition: border-color var(--transition), background var(--transition);
}

.project-card__toggle::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(45deg) translate(-1px, -1px);
  transition: transform var(--transition);
}

.project-card__details[open] .project-card__toggle::before {
  transform: rotate(225deg) translate(-1px, -1px);
}

.project-card__details[open] .project-card__summary {
  border-bottom: 1px solid var(--color-border);
}

.project-card__body {
  padding: 1rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card__body > * {
  margin: 0;
}

.project-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  line-height: 1.35;
}

.project-card__subtitle {
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 500;
  line-height: 1.4;
}

.project-card__meta {
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.4;
}

.project-card__desc {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.project-card__tech {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.35rem;
  align-content: start;
}

.project-card__tech .badge--tech {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.3rem 0.25rem;
  font-size: 0.6875rem;
  text-align: center;
  line-height: 1.2;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-card__points-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card__points-wrap .btn {
  flex-shrink: 0;
  min-height: auto;
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
}

.project-card__points {
  padding-left: 0;
}

.project-card__points li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.project-card__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ==========================================================================
   Timeline
   ========================================================================== */

.timeline {
  --timeline-track: 2rem;
  --timeline-marker-size: 16px;
  max-width: 720px;
  margin-inline: auto;
  padding: 0;
  list-style: none;
}

.timeline__item {
  display: grid;
  grid-template-columns: var(--timeline-track) minmax(0, 1fr);
  column-gap: 0;
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline__item::before {
  content: "";
  grid-column: 1;
  grid-row: 1;
  justify-self: center;
  align-self: start;
  width: 2px;
  height: calc(100% + 1.5rem);
  background: var(--color-border);
  pointer-events: none;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__item:last-child::before {
  height: 100%;
}

.timeline__marker {
  grid-column: 1;
  grid-row: 1;
  justify-self: center;
  align-self: start;
  margin-top: 1.5rem;
  width: var(--timeline-marker-size);
  height: var(--timeline-marker-size);
  background: var(--color-accent);
  border: 3px solid var(--color-bg-alt);
  border-radius: 50%;
  box-sizing: border-box;
  z-index: 1;
}

.timeline__content {
  grid-column: 2;
  grid-row: 1;
  padding: 1.5rem;
}

.timeline__content:hover {
  transform: translateY(-2px);
}

.timeline__date {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.35rem;
}

.timeline__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline__org {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.timeline__detail {
  margin-top: 0.625rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.timeline__item--evolution {
  margin-bottom: 1.5rem;
}

.timeline__marker--evolution {
  --timeline-marker-size: 10px;
  margin-top: 1rem;
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.timeline__evolution {
  grid-column: 2;
  grid-row: 1;
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-sm);
}

.timeline__evolution strong {
  color: var(--color-accent-hover);
  font-weight: 600;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
  align-items: start;
}

.contact-form {
  padding: 2rem;
}

.contact-form:hover,
.contact-info:hover {
  transform: none;
}

.contact-form__notice {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  min-height: 48px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.form-input.is-invalid {
  border-color: var(--color-error);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  display: block;
  min-height: 1.25rem;
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  color: var(--color-error);
}

.form-success {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--color-success);
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-sm);
}

.form-error-message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--color-error);
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.contact-info {
  padding: 2rem;
}

.contact-info__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.contact-info__list li {
  margin-bottom: 1.25rem;
}

.contact-info__list li:last-child {
  margin-bottom: 0;
}

.contact-info__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__tagline {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  font-style: italic;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__links a {
  font-size: 0.875rem;
  font-weight: 500;
}

/* ==========================================================================
   Nav active state
   ========================================================================== */

.nav__link.is-active {
  color: var(--color-accent);
  font-weight: 600;
}

/* ==========================================================================
   Nav backdrop (mobile overlay)
   ========================================================================== */

.nav-backdrop {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.nav-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================================================
   Scroll-to-top button
   ========================================================================== */

.scroll-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(15, 118, 110, 0.35);
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, background var(--transition), box-shadow var(--transition);
  pointer-events: none;
}

.scroll-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.scroll-top:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 6px 20px rgba(15, 118, 110, 0.45);
  transform: translateY(-2px);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    max-width: 100%;
    margin-inline: auto;
  }

  .profil {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem 1.75rem;
    gap: 1.75rem;
  }

  .profil__media {
    width: 160px;
  }

  .profil__content {
    text-align: left;
  }

  .skills-grid--approach {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    --project-card-collapsed-min: 11.5rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .contact-form {
    padding: 1.25rem;
  }

  .contact-info {
    padding: 1.25rem;
  }

  .contact-form__notice {
    font-size: 0.8125rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 1rem;
  }

  .form-group {
    margin-bottom: 0.875rem;
  }

  .form-label {
    font-size: 0.8125rem;
    margin-bottom: 0.3rem;
  }

  .form-input {
    padding: 0.625rem 0.75rem;
    min-height: 42px;
    font-size: 0.9375rem;
  }

  .form-textarea {
    min-height: 90px;
  }

  .btn--full {
    padding: 0.75rem 1.25rem;
    min-height: 44px;
    font-size: 0.9375rem;
  }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 3.5rem;
  }

  .header__burger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 99;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, visibility 0.3s ease;
  }

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

  .nav__list {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }

  .nav__link {
    display: flex;
    align-items: center;
    min-height: 52px;
    padding: 0 1.5rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition), color var(--transition);
  }

  .nav__list li:last-child .nav__link {
    border-bottom: none;
  }

  .nav__link:hover,
  .nav__link:focus-visible {
    background: var(--color-accent-soft);
    color: var(--color-accent);
  }

  .nav__link.is-active {
    background: var(--color-accent-soft);
    color: var(--color-accent);
    border-left: 3px solid var(--color-accent);
    padding-left: calc(1.5rem - 3px);
  }

  .hero {
    padding-top: calc(var(--section-gap) + 0.5rem);
  }

  .hero__actions {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
    min-width: 160px;
  }

  .projects-grid {
    --project-card-collapsed-min: 8.75rem;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
  }

  .project-card {
    width: 100%;
    padding: 0;
  }

  .project-card__summary {
    padding: 1.25rem;
  }

  .project-card__body {
    padding: 0.875rem 1.25rem 1.25rem;
  }

  .section__header {
    margin-bottom: 2rem;
  }

  .code-window__body {
    font-size: 0.6875rem;
    padding: 1rem;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-wrap: anywhere;
    overflow-x: hidden;
  }

  .scroll-top {
    bottom: 1.25rem;
    right: 1.25rem;
  }
}

@media (max-width: 480px) {
  :root {
    --section-gap: 2.75rem;
  }

  .header__logo-svg {
    width: 2rem;
    height: 2rem;
  }

  .header__logo-name {
    font-size: 0.9375rem;
  }

  .header__logo-suffix {
    font-size: 0.8125rem;
  }

  .container {
    padding-inline: 1rem;
  }

  .code-window__body {
    font-size: 0.625rem;
    padding: 0.875rem;
    line-height: 1.55;
  }

  .hero__actions .btn {
    flex: 1 1 140px;
  }

  .hero__title {
    font-size: clamp(1.75rem, 7vw, 2.25rem);
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .section__title {
    font-size: clamp(1.5rem, 5vw, 1.875rem);
  }

  .profil {
    padding: 1.5rem 1.25rem;
    gap: 1.25rem;
  }

  .profil__media {
    width: 140px;
  }

  .profil__content p {
    font-size: 1rem;
  }

  .project-card {
    padding: 0;
  }

  .project-card__summary {
    padding: 1.25rem;
  }

  .timeline__content {
    padding: 1rem 1.125rem;
  }

  .timeline__title {
    font-size: 0.9375rem;
  }

  .contact-form {
    padding: 1rem;
  }

  .contact-info {
    padding: 1rem;
  }

  .contact-info__list li {
    margin-bottom: 1rem;
  }

  .form-group {
    margin-bottom: 0.75rem;
  }

  .form-input {
    padding: 0.5rem 0.625rem;
    min-height: 40px;
    font-size: 0.9375rem;
  }

  .form-textarea {
    min-height: 80px;
  }

  .contact-form__notice {
    font-size: 0.75rem;
    padding: 0.4rem 0.625rem;
    margin-bottom: 0.875rem;
  }

  .scroll-top {
    width: 44px;
    height: 44px;
    bottom: 1rem;
    right: 1rem;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card,
  .btn {
    transition: none;
  }

  .scroll-top {
    transition: opacity 0.1s ease;
  }
}