/* ============================================================
   PORTFOLIO — Aykhan Nuri
   Brutalist minimal, monospace-driven, dual-theme
   ============================================================ */

:root {
  /* Dark theme (default) */
  --bg: #101010;
  --fg: #ffffff;
  --fg-70: rgba(255, 255, 255, 0.7);
  --fg-50: rgba(255, 255, 255, 0.5);
  --fg-30: rgba(255, 255, 255, 0.3);
  --fg-10: rgba(255, 255, 255, 0.1);
  --fg-05: rgba(255, 255, 255, 0.05);
  --fg-03: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.2);
  --surface: rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --ring: rgba(246, 59, 59, 0.5);
  --btn-primary-bg: #ffffff;
  --btn-primary-fg: #1f2228;

  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, 'Courier New', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --max: 1280px;
  --pad-x: 48px;
}

[data-theme="light"] {
  --bg: #f4f4ef;
  --fg: #1f2228;
  --fg-70: rgba(31, 34, 40, 0.7);
  --fg-50: rgba(31, 34, 40, 0.5);
  --fg-30: rgba(31, 34, 40, 0.3);
  --fg-10: rgba(31, 34, 40, 0.1);
  --fg-05: rgba(31, 34, 40, 0.05);
  --fg-03: rgba(31, 34, 40, 0.03);
  --border: rgba(31, 34, 40, 0.12);
  --border-strong: rgba(31, 34, 40, 0.25);
  --surface: rgba(31, 34, 40, 0.03);
  --surface-hover: rgba(31, 34, 40, 0.06);
  --btn-primary-bg: #1f2228;
  --btn-primary-fg: #f4f4ef;
}

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

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.2s ease, color 0.2s ease;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
}

::selection { background: var(--fg); color: var(--bg); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

a {
  color: var(--fg);
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease;
}
a:hover { color: var(--fg-50); }

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* ============ TYPOGRAPHY ============ */
.mono { font-family: var(--mono); }
.uppercase { text-transform: uppercase; letter-spacing: 0.1em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
}

h1, h2, h3, h4 {
  font-weight: 400;
  line-height: 1.1;
  text-wrap: balance;
}

/* ============ LAYOUT ============ */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

section {
  padding-top: 96px;
  padding-bottom: 96px;
  border-top: 1px solid var(--border);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 64px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.section-head .num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-50);
  letter-spacing: 0.1em;
}
.section-head h2 {
  font-family: var(--mono);
  font-weight: 300;
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: -0.01em;
}

/* ============ NAV ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}
.brand .dot {
  width: 8px; height: 8px;
  background: var(--fg);
  display: inline-block;
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-70);
}
.nav-links a:hover { color: var(--fg-50); }

.theme-toggle {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border: 1px solid var(--border-strong);
  padding: 8px 12px;
  color: var(--fg);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover { background: var(--surface-hover); }

@media (max-width: 768px) {
  .nav-links a:not(.cta) { display: none; }
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 14px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
}
.btn-primary:hover { opacity: 0.9; color: var(--btn-primary-fg); }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--surface-hover); color: var(--fg); }

.btn .arrow { display: inline-block; transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ============ HERO ============ */
.hero {
  border-top: none;
  padding-top: 56px;
  padding-bottom: 96px;
  position: relative;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
}
.hero-meta .status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--fg-70);
}
.hero-meta .status .pulse {
  width: 8px; height: 8px;
  background: var(--fg);
  display: inline-block;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-family: var(--mono);
  font-weight: 300;
  font-size: clamp(56px, 14vw, 220px);
  line-height: 0.92;
  letter-spacing: -0.04em;
  margin-bottom: 32px;
  text-wrap: balance;
}
.hero-title .line { display: block; }
.hero-title .dim { color: var(--fg-30); }

.hero-sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.hero-sub p {
  font-size: 17px;
  line-height: 1.55;
  color: var(--fg-70);
  max-width: 52ch;
}
.hero-sub .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-self: end;
  justify-self: end;
}
@media (max-width: 768px) {
  .hero-sub { grid-template-columns: 1fr; gap: 32px; }
  .hero-sub .actions { justify-self: start; }
}

/* ============ ABOUT ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.about-grid p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-70);
  margin-bottom: 20px;
}
.about-grid p strong { color: var(--fg); font-weight: 500; }

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  align-self: start;
}
.stat {
  background: var(--bg);
  padding: 28px;
}
.stat .k {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
  margin-bottom: 16px;
}
.stat .v {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat .vsm {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ============ SKILLS ============ */
.skills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.skill-cat {
  background: var(--bg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.skill-cat .head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.skill-cat .head h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.skill-cat .head .idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-30);
  letter-spacing: 0.1em;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 5px 9px;
  border: 1px solid var(--border-strong);
  color: var(--fg);
  background: transparent;
}
@media (max-width: 768px) {
  .skills { grid-template-columns: 1fr; }
}

/* ============ PROJECTS PREVIEW ============ */
.projects-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}
.proj-row {
  display: grid;
  grid-template-columns: 80px 1fr 1.4fr 200px;
  gap: 24px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  transition: padding 0.2s ease;
  position: relative;
}
.proj-row:hover { padding-left: 12px; padding-right: 12px; background: var(--surface); }
.proj-row .pnum {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-50);
  letter-spacing: 0.1em;
}
.proj-row .ptitle {
  font-family: var(--mono);
  font-weight: 300;
  font-size: clamp(22px, 2.5vw, 32px);
  letter-spacing: -0.01em;
}
.proj-row .pdesc {
  color: var(--fg-70);
  font-size: 15px;
  line-height: 1.55;
}
.proj-row .ptags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.proj-row .ptags .tag { font-size: 11px; }

@media (max-width: 900px) {
  .proj-row { grid-template-columns: 60px 1fr; gap: 12px; }
  .proj-row .pdesc, .proj-row .ptags { grid-column: 2 / 3; }
  .proj-row .ptags { justify-content: flex-start; }
}

/* ============ EXPERIENCE TIMELINE ============ */
.timeline {
  display: flex;
  flex-direction: column;
}
.tl-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
}
.tl-item:first-child { border-top: 1px solid var(--border); }
.tl-date {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-50);
  padding-top: 4px;
}
.tl-date .current {
  display: block;
  width: fit-content;
  background: var(--fg);
  color: var(--bg);
  padding: 2px 6px;
  margin-bottom: 8px;
  letter-spacing: 0.14em;
}
.tl-body h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 22px;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.tl-body .org {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-70);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.tl-body p {
  color: var(--fg-70);
  font-size: 16px;
  line-height: 1.6;
  max-width: 64ch;
}

@media (max-width: 768px) {
  .tl-item { grid-template-columns: 1fr; gap: 14px; }
}

/* ============ EDUCATION & LANGUAGES ============ */
.edu-lang {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.edu-lang > div {
  background: var(--bg);
  padding: 36px;
}
.edu-lang h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.edu .degree {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 26px;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.edu .school {
  color: var(--fg-70);
  font-size: 16px;
  margin-bottom: 4px;
}
.edu .years {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-50);
  letter-spacing: 0.06em;
}
.lang-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.lang-row:last-child { border-bottom: none; }
.lang-row .lng {
  font-family: var(--mono);
  font-size: 18px;
}
.lang-row .lvl {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-50);
  letter-spacing: 0.1em;
}

@media (max-width: 768px) { .edu-lang { grid-template-columns: 1fr; } }

/* ============ CONTACT ============ */
.contact {
  text-align: left;
}
.contact-cta {
  font-family: var(--mono);
  font-weight: 300;
  font-size: clamp(48px, 9vw, 140px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 48px;
  text-wrap: balance;
}
.contact-cta .dim { color: var(--fg-30); }
.contact-rows {
  border-top: 1px solid var(--border);
}
.contact-row {
  display: grid;
  grid-template-columns: 200px 1fr 24px;
  gap: 24px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: padding 0.2s ease;
}
.contact-row:hover { padding-left: 12px; }
.contact-row .label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
}
.contact-row .val {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: -0.005em;
}
.contact-row .arr {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--fg-50);
}
@media (max-width: 768px) {
  .contact-row { grid-template-columns: 1fr; gap: 4px; }
  .contact-row .val { font-size: 16px; }
  .contact-row .arr { display: none; }
}

/* ============ FOOTER ============ */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px var(--pad-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-50);
  max-width: var(--max);
  margin: 0 auto;
}
.footer .ascii { letter-spacing: 0; }
@media (max-width: 640px) { .footer { flex-direction: column; align-items: flex-start; } }

/* ============ DEMO MODAL ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fade 0.2s ease;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  width: 100%;
  max-width: 1000px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: slide 0.25s ease;
}
@keyframes slide { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-head .title {
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.modal-head .close {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
  border: 1px solid var(--border-strong);
  padding: 6px 10px;
}
.modal-head .close:hover { color: var(--fg); background: var(--surface-hover); }
.modal-body {
  padding: 0;
  overflow: auto;
  flex: 1;
}

/* ============ DEMO: RAG ============ */
.demo {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: 600px;
  max-height: 70vh;
}
.demo-sidebar {
  border-right: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: auto;
}
.demo-sidebar .label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
}
.upload-zone {
  border: 1px dashed var(--border-strong);
  padding: 24px 16px;
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-70);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.upload-zone:hover { background: var(--surface-hover); border-color: var(--fg-50); }
.doc-list { display: flex; flex-direction: column; gap: 6px; }
.doc-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
}
.doc-item .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-item .x { color: var(--fg-50); padding-left: 8px; }
.doc-item .x:hover { color: var(--fg); }

.chat {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.chat-log {
  flex: 1;
  overflow: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.msg { max-width: 85%; }
.msg .role {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
  margin-bottom: 6px;
}
.msg .body {
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg);
}
.msg.user { align-self: flex-end; text-align: right; }
.msg.user .body {
  display: inline-block;
  border: 1px solid var(--border-strong);
  padding: 12px 14px;
  text-align: left;
}
.msg.assistant .body {
  border-left: 2px solid var(--fg);
  padding: 4px 0 4px 14px;
}
.msg .citations {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.cite {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  padding: 3px 6px;
  border: 1px solid var(--border);
  color: var(--fg-70);
}
.chat-input {
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.chat-input input {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--fg);
  padding: 12px 14px;
  font-family: var(--sans);
  font-size: 15px;
  outline: none;
  border-radius: 0;
}
.chat-input input:focus { border-color: var(--fg-50); }
.chat-input input::placeholder { color: var(--fg-30); }
.chat-input .send {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  padding: 12px 18px;
  border: none;
}
.chat-input .send:disabled { opacity: 0.5; cursor: not-allowed; }

@media (max-width: 768px) {
  .demo { grid-template-columns: 1fr; height: auto; }
  .demo-sidebar { border-right: none; border-bottom: 1px solid var(--border); }
}

/* ============ DEMO: RANKER ============ */
.ranker {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 640px;
  max-height: 80vh;
}
.ranker-left {
  border-right: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow: auto;
}
.ranker-left textarea {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--fg);
  padding: 14px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  outline: none;
  resize: none;
  min-height: 200px;
  border-radius: 0;
}
.ranker-left textarea:focus { border-color: var(--fg-50); }
.ranker-left .label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-50);
}
.resume-input {
  border: 1px solid var(--border);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.resume-input .head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-70);
}
.resume-input textarea {
  min-height: 80px;
  font-size: 12px;
  border: 1px solid var(--border);
}
.add-resume-btn {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border: 1px solid var(--border-strong);
  padding: 8px 12px;
  align-self: flex-start;
}
.add-resume-btn:hover { background: var(--surface-hover); }
.rank-btn {
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  padding: 14px 20px;
  border: none;
}
.rank-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.ranker-right {
  padding: 24px;
  overflow: auto;
}
.ranker-right .empty {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-50);
  padding: 40px 0;
  text-align: center;
}
.rank-item {
  border: 1px solid var(--border);
  padding: 18px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 60px 1fr 80px;
  gap: 18px;
  align-items: center;
  transition: border-color 0.15s ease;
}
.rank-item:hover { border-color: var(--border-strong); }
.rank-item .pos {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 32px;
  letter-spacing: -0.02em;
  color: var(--fg-30);
}
.rank-item.top1 .pos { color: var(--fg); }
.rank-item .name {
  font-family: var(--mono);
  font-size: 16px;
  margin-bottom: 4px;
}
.rank-item .reason {
  font-size: 13px;
  color: var(--fg-70);
  line-height: 1.4;
}
.rank-item .score {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 28px;
  letter-spacing: -0.02em;
  text-align: right;
}
.rank-item .score-suffix {
  display: block;
  font-size: 10px;
  color: var(--fg-50);
  letter-spacing: 0.14em;
  text-align: right;
  margin-top: 2px;
}

@media (max-width: 768px) {
  .ranker { grid-template-columns: 1fr; height: auto; }
  .ranker-left { border-right: none; border-bottom: 1px solid var(--border); }
}

/* ============ THINKING DOTS ============ */
.dots { display: inline-flex; gap: 4px; }
.dots span {
  width: 6px; height: 6px;
  background: var(--fg-50);
  display: inline-block;
  animation: bounce 1.2s ease-in-out infinite;
}
.dots span:nth-child(2) { animation-delay: 0.15s; }
.dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* ============ SCROLLBARS ============ */
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); }
*::-webkit-scrollbar-thumb:hover { background: var(--fg-50); }

/* ============ UTILITIES ============ */
.divider {
  height: 1px;
  background: var(--border);
  margin: 0;
}
.flex { display: flex; }
.gap-12 { gap: 12px; }
.mt-32 { margin-top: 32px; }

/* ============================================================
   RESPONSIVE — Tablet & Mobile
   ============================================================ */

/* Tablet (≤900px) */
@media (max-width: 900px) {
  :root { --pad-x: 32px; }
  section { padding-top: 72px; padding-bottom: 72px; }
  .section-head { margin-bottom: 48px; gap: 16px; }
  .hero { padding-top: 40px; padding-bottom: 72px; }
  .hero-sub { margin-top: 48px; gap: 32px; }
}

/* Mobile (≤768px) */
@media (max-width: 768px) {
  :root { --pad-x: 20px; }

  html, body { font-size: 15px; }

  section { padding-top: 56px; padding-bottom: 56px; }
  .section-head {
    flex-wrap: wrap;
    margin-bottom: 36px;
    gap: 12px;
    padding-bottom: 18px;
  }

  /* Nav: show links on mobile, wrap if needed */
  .nav-inner {
    padding: 14px var(--pad-x);
    gap: 12px;
    flex-wrap: wrap;
  }
  .brand { font-size: 11px; letter-spacing: 0.1em; }
  .nav-links { gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
  .nav-links a:not(.cta) { display: inline; font-size: 11px; letter-spacing: 0.1em; }
  .theme-toggle { padding: 6px 10px; font-size: 10px; }

  /* Hero */
  .hero { padding-top: 32px; padding-bottom: 56px; }
  .hero-meta {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 32px;
    font-size: 11px;
  }
  .hero-title { margin-bottom: 24px; }
  .hero-sub { margin-top: 32px; padding-top: 24px; gap: 24px; }
  .hero-sub p { font-size: 16px; }
  .hero-sub .actions { width: 100%; }
  .hero-sub .actions .btn { flex: 1; justify-content: center; }

  /* Buttons */
  .btn { padding: 12px 18px; font-size: 12px; }

  /* About */
  .about-grid p { font-size: 16px; }
  .stat-grid { grid-template-columns: 1fr; }
  .stat { padding: 22px; }
  .stat .v { font-size: 32px; }
  .stat .vsm { font-size: 16px; }

  /* Skills */
  .skill-cat { padding: 24px; gap: 14px; }
  .skill-cat .head h3 { font-size: 13px; }

  /* Projects rows */
  .proj-row { padding: 24px 0; }
  .proj-row:hover { padding-left: 0; padding-right: 0; }
  .proj-row .ptitle { font-size: 22px; }
  .proj-row .pdesc { font-size: 14px; }

  /* Experience */
  .tl-item { padding: 28px 0; }
  .tl-body h3 { font-size: 18px; }
  .tl-body p { font-size: 15px; }

  /* Education / Languages */
  .edu-lang > div { padding: 26px; }
  .edu .degree { font-size: 22px; }
  .lang-row .lng { font-size: 16px; }

  /* Contact */
  .contact-cta {
    font-size: clamp(36px, 11vw, 64px);
    margin-bottom: 32px;
  }
  .contact-row { padding: 18px 0; }
  .contact-row:hover { padding-left: 0; }
  .contact-row .val { word-break: break-all; }

  /* Footer */
  .footer { padding: 24px var(--pad-x); font-size: 10px; }

  /* Modal — use full screen on mobile */
  .modal-overlay { padding: 0; }
  .modal { max-height: 100vh; height: 100vh; max-width: 100%; border: none; }
  .modal-head { padding: 14px 18px; }
  .modal-head .title { font-size: 11px; }

  /* Demos: stack & fit viewport */
  .demo { max-height: none; height: calc(100vh - 56px); }
  .demo-sidebar { padding: 18px; max-height: 35vh; }
  .chat-log { padding: 18px; }
  .chat-input { padding: 12px 18px; gap: 8px; }
  .chat-input input { padding: 10px 12px; font-size: 14px; }
  .chat-input .send { padding: 10px 14px; font-size: 11px; }

  .ranker { max-height: none; height: auto; }
  .ranker-left, .ranker-right { padding: 18px; }
  .rank-item {
    grid-template-columns: 40px 1fr;
    gap: 12px;
    padding: 14px;
  }
  .rank-item .pos { font-size: 24px; }
  .rank-item .score { grid-column: 2; text-align: left; font-size: 22px; }
  .rank-item .score-suffix { text-align: left; }

  /* Projects page detail */
  .pp-hero { padding-top: 48px; padding-bottom: 48px; }
  .pp-detail { padding: 48px 0; }
  .pp-side .pnum { font-size: 40px; margin-bottom: 8px; }
  .pp-body .lead { font-size: 16px; margin-bottom: 24px; }
  .pp-meta > div { padding: 14px 16px; }
  .pp-list li { font-size: 14px; grid-template-columns: 22px 1fr; gap: 8px; padding: 12px 0; }
  .pp-actions .btn { flex: 1; justify-content: center; }
}

/* Small mobile (≤420px) */
@media (max-width: 420px) {
  :root { --pad-x: 16px; }
  .nav-links { gap: 10px; }
  .nav-links a:not(.cta) { font-size: 10px; }
  .brand { font-size: 10px; }
  .hero-title { letter-spacing: -0.03em; }
  .section-head .num { font-size: 11px; }
}