:root {
  --ink: #0b1220;
  --ink-soft: #1a2436;
  --paper: #f6f4ef;
  --paper-2: #efece5;
  --surface: #ffffff;
  --teal: #0f766e;
  --teal-bright: #14b8a6;
  --teal-deep: #0d5c56;
  --teal-glow: rgba(15, 118, 110, 0.28);
  --text: #1c2433;
  --muted: #5c6b7a;
  --line: rgba(11, 18, 32, 0.1);
  --line-strong: rgba(11, 18, 32, 0.18);
  --radius: 1.15rem;
  --radius-sm: 0.65rem;
  --font-display: "Syne", "Cairo", sans-serif;
  --font-body: "Manrope", "Cairo", sans-serif;
  --font-ar: "Cairo", sans-serif;
  --nav-h: 4.75rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --container: 1120px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--paper);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

html[lang="ar"] body,
html[dir="rtl"] body {
  font-family: var(--font-ar);
}

html[lang="ar"] .hero-name,
html[lang="ar"] .section-title,
html[lang="ar"] .brand-mark,
html[dir="rtl"] .hero-name,
html[dir="rtl"] .section-title,
html[dir="rtl"] .brand-mark {
  font-family: var(--font-ar);
  letter-spacing: 0;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 520px at 8% -5%, rgba(15, 118, 110, 0.09), transparent 55%),
    radial-gradient(700px 420px at 100% 15%, rgba(11, 18, 32, 0.05), transparent 50%),
    linear-gradient(180deg, #f8f6f1 0%, var(--paper) 45%, #f3f0ea 100%);
}

.page-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(11, 18, 32, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 18, 32, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

a {
  color: var(--teal-deep);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

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

img {
  max-width: 100%;
}

.container {
  max-width: var(--container);
  width: 100%;
  padding-inline: clamp(1rem, 4vw, 1.5rem);
}

/* ========== Nav ========== */
.site-nav {
  min-height: var(--nav-h);
  padding-block: 0.7rem;
  background: transparent;
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
}

.site-nav.scrolled {
  background: rgba(246, 244, 239, 0.9);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line);
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.04em;
  color: #fff !important;
  transition: color 0.3s var(--ease);
}

.brand-mark span {
  color: var(--teal-bright);
}

.site-nav.scrolled .brand-mark {
  color: var(--ink) !important;
}

.site-nav.scrolled .brand-mark span {
  color: var(--teal);
}

.site-nav .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 0.8rem !important;
  border-radius: 999px;
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-nav .nav-link:hover,
.site-nav .nav-link.active {
  color: #fff !important;
  background: rgba(255, 255, 255, 0.14);
}

.site-nav.scrolled .nav-link {
  color: var(--muted) !important;
}

.site-nav.scrolled .nav-link:hover,
.site-nav.scrolled .nav-link.active {
  color: var(--ink) !important;
  background: rgba(15, 118, 110, 0.1);
}

.navbar-toggler {
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  box-shadow: none;
  padding: 0.4rem 0.55rem;
}

.navbar-toggler-icon {
  filter: invert(1) brightness(1.2);
}

.site-nav.scrolled .navbar-toggler {
  border-color: var(--line-strong);
}

.site-nav.scrolled .navbar-toggler-icon {
  filter: none;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem var(--teal-glow);
}

.lang-toggle {
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  min-width: 3.1rem;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.lang-toggle:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.site-nav.scrolled .lang-toggle {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.site-nav.scrolled .lang-toggle:hover {
  border-color: var(--teal);
  background: rgba(15, 118, 110, 0.08);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  color: #f7f5f0;
  overflow: hidden;
  padding: calc(var(--nav-h) + 3rem) 0 5.5rem;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(105deg, rgba(11, 18, 32, 0.88) 0%, rgba(11, 18, 32, 0.72) 42%, rgba(13, 92, 86, 0.55) 100%),
    url("https://images.unsplash.com/photo-1498050108023-c5249f4df085?auto=format&fit=crop&w=2200&q=80") center / cover no-repeat;
  transform: scale(1.05);
  animation: heroDrift 26s ease-in-out infinite alternate;
}

.hero-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 75% 20%, rgba(20, 184, 166, 0.22), transparent 48%),
    linear-gradient(180deg, transparent 50%, rgba(11, 18, 32, 0.45) 100%);
}

@keyframes heroDrift {
  from { transform: scale(1.05) translate3d(0, 0, 0); }
  to { transform: scale(1.12) translate3d(-1.2%, 1.2%, 0); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 44rem;
}

.hero-kicker {
  display: inline-block;
  margin-bottom: 1.15rem;
  font-size: clamp(0.72rem, 1.6vw, 0.82rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(247, 245, 240, 0.78);
  border-inline-start: 2px solid var(--teal-bright);
  padding-inline-start: 0.85rem;
  line-height: 1.5;
  max-width: 36rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 11vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.95;
  margin: 0 0 1.35rem;
  color: #fff;
  text-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  max-width: 100%;
}

.hero-lead {
  font-size: clamp(0.98rem, 2.4vw, 1.25rem);
  max-width: 34rem;
  color: rgba(247, 245, 240, 0.88);
  margin-bottom: 2.1rem;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-actions .btn {
  min-height: 3rem;
}

.btn-primary {
  --bs-btn-bg: var(--teal);
  --bs-btn-border-color: var(--teal);
  --bs-btn-hover-bg: var(--teal-deep);
  --bs-btn-hover-border-color: var(--teal-deep);
  --bs-btn-active-bg: var(--teal-deep);
  --bs-btn-active-border-color: var(--teal-deep);
  --bs-btn-font-weight: 600;
  border-radius: 999px;
  padding-inline: 1.55rem;
  letter-spacing: -0.01em;
}

.btn-outline-light {
  --bs-btn-font-weight: 600;
  border-radius: 999px;
  border-width: 1.5px;
  letter-spacing: -0.01em;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 1.6rem;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  z-index: 1;
}

.scroll-hint span {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 5px;
  height: 5px;
  margin-left: -2.5px;
  background: #fff;
  border-radius: 50%;
  animation: scrollDot 1.8s var(--ease) infinite;
}

@keyframes scrollDot {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(16px); }
}

/* ========== Proof bar ========== */
.proof-bar {
  position: relative;
  z-index: 2;
  margin-top: -1px;
  background: var(--ink);
  color: rgba(247, 245, 240, 0.88);
  padding: 1.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem 2rem;
}

.proof-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-inline-start: 1rem;
  border-inline-start: 2px solid rgba(20, 184, 166, 0.55);
}

.proof-value {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #fff;
}

.proof-value .plus {
  color: var(--teal-bright);
}

.proof-label {
  margin: 0;
  font-size: 0.82rem;
  color: rgba(247, 245, 240, 0.62);
  max-width: 11rem;
  line-height: 1.4;
}

/* ========== Sections ========== */
.section {
  padding: 6.5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(239, 236, 229, 0.65), rgba(246, 244, 239, 0.2));
  border-block: 1px solid var(--line);
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.85rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--ink);
  margin: 0;
}

.section-copy {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 0;
  max-width: 40rem;
}

.about-copy {
  font-size: 1.08rem;
  line-height: 1.75;
}

/* ========== Impact ========== */
.impact-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.impact-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  padding: 1.6rem 1.25rem 1.6rem 0;
  border-bottom: 1px solid var(--line);
}

.impact-item:nth-child(odd) {
  padding-inline-end: 1.75rem;
  border-inline-end: 1px solid var(--line);
}

.impact-item:nth-child(even) {
  padding-inline-start: 1.75rem;
}

.impact-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal);
  margin-top: 0.15rem;
}

.impact-item p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

/* ========== Timeline ========== */
.timeline {
  display: grid;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(150px, 210px) 1fr;
  gap: 1.5rem 2.25rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item:last-child {
  border-bottom: 0;
}

.timeline-item.is-featured {
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.07), transparent 55%);
  margin-inline: 0;
  padding-inline: 1rem;
  border-radius: var(--radius-sm);
}

.timeline-date {
  display: block;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

.timeline-type {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--teal-deep);
  background: rgba(15, 118, 110, 0.1);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

.timeline-body h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.2rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.timeline-company {
  color: var(--muted);
  margin-bottom: 0.9rem;
  font-weight: 500;
}

.timeline-company a {
  color: inherit;
  border-bottom: 1px solid transparent;
}

.timeline-company a:hover {
  color: var(--teal-deep);
  border-bottom-color: var(--teal);
}

.timeline-body ul {
  margin: 0;
  padding-inline-start: 1.1rem;
  color: var(--muted);
}

.timeline-body li + li {
  margin-top: 0.4rem;
}

/* ========== Skills ========== */
.top-skills-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.9rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.skill-tags span {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
}

.skill-tags-lg span {
  font-size: 0.95rem;
  padding: 0.6rem 1.05rem;
  border-color: var(--line-strong);
}

.skill-group h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.skill-list {
  margin: 0;
  padding-inline-start: 1.1rem;
  color: var(--muted);
}

.skill-list li + li {
  margin-top: 0.4rem;
}

.biz-band {
  margin-top: 0.5rem;
  padding: 1.85rem 1.75rem;
  border-radius: var(--radius);
  background:
    radial-gradient(520px 240px at 100% 0%, rgba(20, 184, 166, 0.28), transparent 60%),
    linear-gradient(145deg, var(--ink) 0%, var(--ink-soft) 100%);
  color: rgba(247, 245, 240, 0.9);
}

.biz-band h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.15rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.biz-band .row p {
  position: relative;
  padding-inline-start: 1.05rem;
  margin: 0;
  color: rgba(247, 245, 240, 0.88);
}

.biz-band .row p::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0.55rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-bright);
}

/* ========== Platforms ========== */
.platform-group {
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--line);
}

.platform-group:last-child {
  border-bottom: 0;
}

.platform-group h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.95rem;
  letter-spacing: -0.02em;
}

.platform-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.platform-links a {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 0.48rem 0.85rem;
  border-radius: 999px;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.platform-links a:hover {
  border-color: var(--teal);
  color: var(--teal-deep);
  background: rgba(15, 118, 110, 0.07);
  transform: translateY(-2px);
}

/* ========== Early projects ========== */
.project-item {
  height: 100%;
  padding: 1.6rem 0 1.4rem;
  border-top: 2px solid var(--ink);
  transition: border-color 0.3s var(--ease);
}

.project-item:hover {
  border-color: var(--teal);
}

.project-index {
  display: block;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 0.85rem;
}

.project-item h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.35rem;
  letter-spacing: -0.02em;
}

.project-stack {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--teal-deep);
  margin-bottom: 0.75rem;
}

.project-item p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

/* ========== Education ========== */
.edu-band {
  padding: 2.5rem 2.25rem;
  border-radius: var(--radius);
  background:
    linear-gradient(125deg, rgba(15, 118, 110, 0.1), rgba(11, 18, 32, 0.04)),
    var(--surface);
  border: 1px solid var(--line);
}

.edu-meta {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

/* ========== Contact ========== */
.section-contact {
  background:
    radial-gradient(780px 380px at 0% 100%, rgba(15, 118, 110, 0.1), transparent 60%),
    var(--paper);
  padding-bottom: 7rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.9rem;
  font-size: 1.05rem;
}

.contact-list i {
  width: 2.45rem;
  height: 2.45rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(15, 118, 110, 0.1);
  color: var(--teal-deep);
  flex-shrink: 0;
}

.contact-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  border: 1.5px solid var(--line-strong);
  background: transparent;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.65rem 1.25rem;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.btn-ghost:hover {
  color: var(--ink);
  background: rgba(11, 18, 32, 0.04);
  border-color: var(--ink);
}

.contact-form {
  padding: 1.85rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(11, 18, 32, 0.06);
}

.contact-form .form-label {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--ink);
}

.contact-form .form-control {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.95rem;
  background: var(--paper);
}

.contact-form .form-control:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 0.2rem var(--teal-glow);
  background: #fff;
}

.form-note {
  color: var(--teal-deep);
  font-size: 0.9rem;
  font-weight: 500;
}

.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
  background: var(--paper-2);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr auto auto;
  gap: 1.25rem 2rem;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.footer-brand span {
  color: var(--teal);
}

.footer-links {
  display: flex;
  gap: 0.55rem;
}

.footer-links a {
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 1.05rem;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.footer-links a:hover {
  border-color: var(--teal);
  color: var(--teal-deep);
  transform: translateY(-2px);
}

.footer-copy {
  text-align: end;
}

.back-top {
  position: fixed;
  inset-inline-end: 1.25rem;
  bottom: 1.25rem;
  z-index: 40;
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 30px rgba(11, 18, 32, 0.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease), transform 0.3s var(--ease), background 0.25s var(--ease);
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-top:hover {
  background: var(--teal);
}

/* ========== Reveal ========== */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

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

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
.delay-4 { transition-delay: 0.32s; }

/* ========== RTL ========== */
html[dir="rtl"] .navbar-nav {
  margin-right: auto !important;
  margin-left: 0 !important;
}

html[dir="rtl"] .hero-kicker {
  border-inline-start: 2px solid var(--teal-bright);
}

/* ========== Responsive ========== */
@media (max-width: 1199.98px) {
  .site-nav .nav-link {
    font-size: 0.84rem;
    padding: 0.45rem 0.65rem !important;
  }
}

@media (max-width: 991.98px) {
  :root {
    --nav-h: 4.25rem;
  }

  .hero {
    align-items: center;
    padding: calc(var(--nav-h) + 2.5rem) 0 4.5rem;
    min-height: min(100svh, 920px);
  }

  .hero-inner {
    max-width: 100%;
  }

  .proof-bar {
    padding: 1.5rem 0;
  }

  .proof-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.15rem 1.25rem;
  }

  .section {
    padding: 5rem 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    padding: 1.5rem 0;
  }

  .impact-list {
    grid-template-columns: 1fr;
  }

  .impact-item,
  .impact-item:nth-child(odd),
  .impact-item:nth-child(even) {
    padding: 1.35rem 0;
    border-inline-end: 0;
  }

  .site-nav .navbar-collapse {
    background: rgba(246, 244, 239, 0.98);
    border: 1px solid var(--line);
    border-radius: 1rem;
    margin-top: 0.75rem;
    padding: 0.65rem;
    max-height: calc(100svh - var(--nav-h) - 1rem);
    overflow-y: auto;
  }

  .site-nav .navbar-collapse .nav-link {
    color: var(--muted) !important;
    padding: 0.75rem 0.9rem !important;
  }

  .site-nav .navbar-collapse .nav-link:hover,
  .site-nav .navbar-collapse .nav-link.active {
    color: var(--ink) !important;
    background: rgba(15, 118, 110, 0.1);
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    gap: 1rem;
  }

  .footer-copy {
    grid-column: 1 / -1;
    text-align: start;
  }

  .scroll-hint {
    display: none;
  }
}

@media (max-width: 767.98px) {
  .proof-value {
    font-size: clamp(1.45rem, 7vw, 1.9rem);
  }

  .proof-label {
    max-width: none;
    font-size: 0.78rem;
  }

  .section-title {
    font-size: clamp(1.65rem, 7vw, 2.2rem);
  }

  .section-copy,
  .about-copy {
    font-size: 1rem;
  }

  .platform-links a {
    font-size: 0.8rem;
    padding: 0.42rem 0.7rem;
  }

  .skill-tags-lg span {
    font-size: 0.86rem;
    padding: 0.5rem 0.85rem;
  }

  .contact-list li {
    font-size: 0.98rem;
    align-items: flex-start;
  }

  .contact-quick {
    flex-direction: column;
  }

  .contact-quick .btn-ghost {
    width: 100%;
    text-align: center;
  }

  .back-top {
    inset-inline-end: max(0.85rem, env(safe-area-inset-right));
    bottom: max(0.85rem, env(safe-area-inset-bottom));
    width: 2.55rem;
    height: 2.55rem;
  }
}

@media (max-width: 575.98px) {
  .section {
    padding: 3.75rem 0;
  }

  .hero {
    padding: calc(var(--nav-h) + 1.75rem) 0 3.5rem;
    min-height: 100svh;
  }

  .hero-kicker {
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    margin-bottom: 0.9rem;
  }

  .hero-name {
    font-size: clamp(2.35rem, 12vw, 3.1rem);
    margin-bottom: 1rem;
  }

  .hero-lead {
    margin-bottom: 1.5rem;
    font-size: 0.98rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

  .proof-item {
    padding-block: 0.15rem;
  }

  .proof-bar {
    padding: 1.25rem 0;
  }

  .edu-band,
  .contact-form,
  .biz-band {
    padding: 1.25rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: start;
  }

  .footer-copy {
    text-align: start;
  }

  .timeline-item.is-featured {
    padding-inline: 0.75rem;
  }

  .project-item h3 {
    font-size: 1.1rem;
  }

  .lang-toggle,
  .navbar-toggler {
    min-height: 2.5rem;
  }
}

@media (max-width: 379.98px) {
  .brand-mark {
    font-size: 1.2rem;
  }

  .hero-name {
    font-size: 2.1rem;
  }

  .proof-value {
    font-size: 1.35rem;
  }
}

@media (max-height: 620px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: calc(var(--nav-h) + 1.5rem) 0 2.5rem;
    align-items: center;
  }

  .hero-name {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-lead {
    margin-bottom: 1.1rem;
  }

  .scroll-hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-atmosphere { animation: none; }
  .scroll-hint span { animation: none; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}