:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #16191f;
  --accent: #e5e7eb;
  --accent-soft: rgba(229, 231, 235, 0.15);
  --text: #f3f4f6;
  --text-muted: #9ca3af;
  --border: rgba(156, 163, 175, 0.16);
  --danger: #f87171;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(243, 244, 246, 0.08), transparent 55%), var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

.app-footer {
  text-align: center;
  padding: 2rem 1.5rem 3rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: 3.5rem clamp(1.5rem, 5vw, 6rem) 2rem;
}

.masthead__content {
  max-width: 620px;
}

.masthead__name {
  margin: 0 0 0.75rem;
  font-size: clamp(2.75rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.masthead__tagline {
  margin: 0;
  color: var(--text-muted);
  font-size: clamp(1rem, 2.2vw, 1.2rem);
}

.masthead__contact {
  list-style: none;
  display: grid;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.masthead__contact a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.12s ease;
}

.masthead__contact a:hover {
  color: #f9fafb;
}

.layout {
  width: min(1200px, 92vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  padding-bottom: 6rem;
}

.profile {
  display: grid;
  gap: 1.75rem;
  grid-column: 1 / -1;
}

.profile .card {
  max-width: 860px;
}

.chat {
  grid-column: 1 / -1;
  justify-self: center;
  width: min(520px, 100%);
  display: grid;
  gap: 1rem;
}

.chat__header {
  text-align: center;
  display: grid;
  gap: 0.35rem;
}

.chat__title {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2rem);
}

.chat__subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.chat-container {
  display: flex;
  flex-direction: column;
  background-color: var(--card);
  border-radius: 1.25rem;
  box-shadow: 0 30px 60px rgba(10, 13, 18, 0.45);
  border: 1px solid var(--border);
  overflow: hidden;
  max-height: 420px;
}

.chat-log {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  display: grid;
  gap: 1rem;
  background-image: linear-gradient(180deg, rgba(229, 231, 235, 0.06), transparent 18%);
}

.message {
  padding: 1rem 1.25rem;
  border-radius: 1rem;
  background-color: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.08);
  display: grid;
  gap: 0.35rem;
}

.message--user {
  justify-self: end;
  background: linear-gradient(135deg, rgba(107, 114, 128, 0.92), rgba(75, 85, 99, 0.92));
  color: #f9fafb;
  border-color: transparent;
}

.message--error {
  border-color: rgba(248, 113, 113, 0.35);
  background-color: rgba(248, 113, 113, 0.1);
  color: var(--danger);
}

.message__author {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--accent);
}

.message--user .message__author {
  color: #0f172a;
}

.message__content {
  white-space: pre-wrap;
  font-size: 0.95rem;
}

.card {
  background-color: rgba(15, 23, 42, 0.68);
  border-radius: 1.5rem;
  padding: 1.8rem;
  border: 1px solid rgba(148, 163, 184, 0.15);
  box-shadow: 0 25px 45px rgba(10, 17, 31, 0.35);
  display: grid;
  gap: 1rem;
}

.card__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.chat-input {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
  background-color: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(12px);
}

.chat-input textarea {
  flex: 1;
  resize: none;
  padding: 0.875rem 1rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background-color: rgba(15, 23, 42, 0.9);
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.chat-input textarea:focus {
  outline: none;
  border-color: rgba(229, 231, 235, 0.45);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.send-btn {
  appearance: none;
  border: none;
  border-radius: 0.75rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: #111827;
  background: linear-gradient(120deg, rgba(209, 213, 219, 0.95), rgba(156, 163, 175, 0.95));
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
}

.send-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 12px 20px rgba(156, 163, 175, 0.35);
}

.send-btn:disabled {
  cursor: progress;
  filter: grayscale(0.35);
  opacity: 0.7;
}

.skill-grid {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.skill-grid dt {
  font-weight: 600;
  color: var(--accent);
}

.skill-grid dd {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
}

.meta h3,
.project h3,
.job h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.meta__sub,
.project__meta,
.job__meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.meta ul,
.project ul,
.job ul,
.card ul {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.45rem;
  color: var(--text-muted);
}

.project + .project,
.job + .job {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.app-footer {
  padding-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;
}

@media (max-width: 720px) {
  .masthead {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2.5rem 1.5rem 1.5rem;
  }

  .masthead__contact {
    text-align: left;
  }

  .layout {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    width: min(680px, 92vw);
  }

  .chat-input {
    flex-direction: column;
    align-items: stretch;
  }

  .send-btn {
    width: 100%;
  }

  .card {
    border-radius: 1.25rem;
  }
}