:root {
  --bg: #0b0b0b;
  --rail: #2c2c2c;
  --panel: #232323;
  --line: rgba(255, 255, 255, .10);

  --text: rgba(255, 255, 255, .92);
  --dim: rgba(255, 255, 255, .70);
  --hover: rgba(255, 255, 255, .55);

  --rail-w: 80px; 
  --ease: cubic-bezier(.2, .8, .2, 1);
  --dur: 480ms; 
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.m-header{
  display:none;
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:64px;
  padding:0 18px;
  background:#1E1E1E;
  border-bottom:1px solid var(--line);
  z-index:40;
  align-items:center;
  justify-content:space-between;
}

.m-header__logo{
  display:flex;
  align-items:center;
  text-decoration:none;
  color:var(--text);
}

.m-header__logo-fallback{
  font-weight:800;
  letter-spacing:.06em;
  font-size:26px;
  opacity:.75;
}

.m-header__toggle{
  width:44px;
  height:44px;
  border:0;
  background:transparent;
  color:var(--text);
  cursor:pointer;
  display:grid;
  place-items:center;
  padding:0;
}

.m-header__icon{
  font-size:24px;
  line-height:1;
}

.m-header__icon--close{ display:none; }
body.nav-open .m-header__icon--menu{ display:none; }
body.nav-open .m-header__icon--close{ display:block; }

.rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  background: #1E1E1E;
  backdrop-filter: blur(10px);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 24px 12px;
  z-index: 30;
}

.rail__top,
.rail__middle,
.rail__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rail__top {
  gap: 28px; 
  padding-top: 2px; 
}

.rail__middle {
  flex: 1;
  justify-content: center;
  min-height: 44px; 
}

.rail__bottom {
  gap: 12px; 
  padding-bottom: 2px;
}

.rail__logo {
  width: 44px; 
  height: 44px; 
  display: grid;
  place-items: center;
  text-decoration: none;
  color: var(--dim);
}

.rail__logo-fallback {
  font-weight: 800;
  letter-spacing: .06em;
  font-size: 28px; 
  opacity: .65;
}

.rail__nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.rail__link {
  width: 16px;
  height: fit-content;
  display: grid;
  place-items: center;
  text-decoration: none;
  color: #f4f4f4;
  transition: opacity 160ms var(--ease);
}

.rail__link:hover {
  opacity: .78;
}

.rail__link span {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: .06em;
  font-size: 12px; 
  font-weight: 500;
  font-family: 'Inter', sans-serif;
}

.rail__toggle {
  position: static;
  width: 44px; 
  height: 44px; 
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  margin:6px;
}

.rail__icon {
  font-size: 24px; 
  line-height: 1;
}

.rail__icon--close {
  display: none;
}

body.nav-open .rail__icon--menu {
  display: none;
}

body.nav-open .rail__icon--close {
  display: block;
}

.rail__social {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  margin-top: 4px; 
}

.rail__social-link {
  width: 36px; 
  height: 36px;
  display: grid;
  place-items: center;
  text-decoration: none;
  color: #f4f4f4;
  transition: opacity 160ms var(--ease);
}

.rail__social-link:hover {
  opacity: .78;
}

.rail__social-fallback {
  font-weight: 700;
  font-size: 13px;
  opacity: .85;
}


.panel {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}

.panel__inner {
  position: absolute;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100vw;
  background: rgba(0, 0, 0, .0);
}

.panel__content {
  position: absolute;
  top: 0;
  left: var(--rail-w);
  height: 100vh;
  width: calc(100vw - var(--rail-w));
  background: #1E1E1E;
  transform: translateX(-100%);
  transition: transform var(--dur) var(--ease);
  padding: 72px 60px; 
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 32px; 
}

body.nav-open .panel {
  pointer-events: auto;
}

body.nav-open .panel__content {
  transform: translateX(0);
}

.panel__menu {
  display: grid;
  align-content: start;
  gap: 16px;
  max-width: 900px;
}

.panel__item {
  font-family: "Playfair Display", serif;
  font-size: clamp(32px, 4.5vw, 100px);
  line-height: 1;
  text-decoration: none;
  color: #F4F4F4;
  opacity: .95;
  transition: opacity 160ms var(--ease);
  padding: 4px 0;
}

.panel__item:hover {
  opacity: .78;
}

.panel__contact {
  display: flex;
  flex-direction: column;
  gap: 16px; 
  align-items: flex-start;
}

.panel__email {
  color: #f4f4f4;
  text-decoration: none;
  font-family: "Inter", sans-serif;
  font-size: 20px; 
  transition: opacity 160ms var(--ease);
}

.panel__email:hover {
  opacity: .78;
}

.panel__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 16px;
  border-radius: 4px;
  border: none;
  background: #F4F4F4;
  color: #1e1e1e;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  font-family: "Inter", sans-serif;
  transition: opacity 160ms var(--ease), background 160ms var(--ease);
}

.panel__cta:hover {
  opacity: .9;
  background: rgba(255, 255, 255, .18);
}

@media (min-width: 861px) and (max-width: 1100px){
  :root{
    --rail-w: 72px;
  }

  .rail{
    padding:20px 10px;
    gap:28px;
  }

  .panel__content{
    padding:72px 40px;
  }

  .panel__item{
    font-size: clamp(32px, 5.2vw, 88px);
  }
}


@media (max-width: 860px) {
  .m-header{
    display:flex;
  }

  .rail{
    display:none;
  }

  .panel__content{
    left:0;
    width:100vw;
    padding:88px 18px 100px; 
  }

  .panel__menu{
    gap:10px;
  }

  .panel__item{
    font-size: clamp(28px, 9vw, 56px);
  }

  .panel__email{
    font-size:16px;
  }
}



@media (prefers-reduced-motion: reduce) {
  .panel__content {
    transition: none;
  }
}