:root {
  --ink: #15231f;
  --ink-soft: #2a3d36;
  --paper: #e8efe8;
  --paper-2: #d5e3d8;
  --accent: #0f6b5c;
  --accent-2: #c45c26;
  --line: rgba(21, 35, 31, 0.14);
  --shadow: 0 18px 50px rgba(21, 35, 31, 0.12);
  --sidebar: 15rem;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(15, 107, 92, 0.22), transparent 60%),
    radial-gradient(700px 420px at 90% 8%, rgba(196, 92, 38, 0.16), transparent 55%),
    linear-gradient(160deg, #eef5ef 0%, #dce8df 45%, #cfdfd4 100%);
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift {
  from { filter: saturate(1); transform: scale(1); }
  to { filter: saturate(1.08); transform: scale(1.03); }
}

.shell {
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(232, 239, 232, 0.72);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar-tag {
  margin: 0;
  margin-right: auto;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.topbar-auth {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: auto;
}
.topbar-login {
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.45rem 0.75rem;
  border-radius: 0.35rem;
  border: 0;
  background: transparent;
  transition: background 0.18s ease, color 0.18s ease;
}
.topbar-login:hover {
  background: rgba(15, 107, 92, 0.1);
  color: var(--ink);
}
.topbar-login.is-active {
  background: rgba(15, 107, 92, 0.16);
  color: var(--accent);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
}
.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  animation: settle 0.7s ease both;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
}
.sidebar {
  border-right: 1px solid var(--line);
  padding: 1.5rem 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: rgba(255, 255, 255, 0.28);
}
.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.nav-link {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: 0.35rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.nav-link:hover {
  background: rgba(15, 107, 92, 0.1);
  color: var(--ink);
  transform: translateX(2px);
}
.nav-link.is-active {
  background: rgba(15, 107, 92, 0.16);
  color: var(--accent);
}
.main {
  padding: 2rem clamp(1.25rem, 3vw, 3rem) 3.5rem;
  animation: rise 0.55s ease both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@keyframes settle {
  from { opacity: 0; transform: translateY(-6px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

.hero { max-width: 40rem; margin-bottom: 2.25rem; }
.hero.compact { margin-bottom: 1.5rem; }
.hero-brand {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.hero-line {
  margin: 0;
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 36rem;
}

.section-label {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.musing-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  max-width: 42rem;
}
.musing-card-link {
  display: grid;
  gap: 0.25rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: padding-left 0.2s ease, color 0.2s ease;
}
.musing-card-link:hover { padding-left: 0.35rem; color: var(--accent); }
.musing-card-link time {
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.musing-card-link strong {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 600;
}
.musing-card-link span {
  color: var(--ink-soft);
  font-size: 0.98rem;
}
.empty { color: var(--ink-soft); }

.musing-article { max-width: 40rem; }
.musing-article .crumb { margin: 0 0 1rem; }
.musing-article .crumb a { color: var(--accent); }
.musing-article header time {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.musing-article h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.7rem);
  line-height: 1.1;
}
.prose p { margin: 0 0 1rem; }
.prose code {
  font-size: 0.92em;
  background: rgba(15, 107, 92, 0.1);
  padding: 0.1em 0.35em;
  border-radius: 0.25rem;
}

.login-panel { max-width: 24rem; }
.login-form {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.25rem;
}
.login-form label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
}
.login-form input {
  font: inherit;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: rgba(255, 255, 255, 0.75);
}
.login-form button,
.project-entry .go {
  font: inherit;
  font-weight: 700;
  border: 0;
  border-radius: 0.4rem;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #f4faf7;
  cursor: pointer;
}
.login-form button:hover { filter: brightness(1.05); }

.flash {
  padding: 0.65rem 0.8rem;
  border-radius: 0.35rem;
  background: rgba(15, 107, 92, 0.12);
}
.flash.error {
  background: rgba(196, 92, 38, 0.14);
  color: #7a2f0f;
}

.projects {
  display: grid;
  gap: 1rem;
  max-width: 46rem;
}
.project-entry {
  display: grid;
  gap: 0.35rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: transform 0.18s ease;
}
.project-entry:hover { transform: translateX(4px); }
.project-entry h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.45rem;
}
.project-entry p {
  margin: 0;
  color: var(--ink-soft);
}
.project-entry .go {
  justify-self: start;
  margin-top: 0.45rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1rem 1rem;
  }
  .sidebar nav {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .topbar-tag { display: none; }
}