/* rtwyt.ai — opencode-style: flat dark, zinc borders, IBM Plex + JetBrains Mono */

:root {
  --bg: #0f0d0d;
  --bg-elevated: #111111;
  --panel: #141414;
  --panel-2: #181818;
  --border: #27272a;
  --border-subtle: #1f1f22;
  --text: #ffffff;
  --muted: #a1a1aa;
  --muted-2: #71717a;
  --radius-shell: 12px;
  --radius-panel: 8px;
  --radius-pill: 999px;
  --shell-max: 1080px;
  --font-sans: "IBM Plex Sans Arabic", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.font-mono {
  font-family: var(--font-mono);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Outer frame — wide centered container, thin border */
.page-shell {
  max-width: var(--shell-max);
  margin: 1.5rem auto;
  padding: 0 1.5rem 2.5rem;
  min-height: calc(100vh - 3rem);
  border: 1px solid var(--border);
  border-radius: var(--radius-shell);
  background: var(--bg);
}

@media (max-width: 640px) {
  .page-shell {
    margin: 0.75rem;
    padding: 0 1rem 1.75rem;
    border-radius: 10px;
  }
}

.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.brand {
  justify-self: start;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  text-transform: lowercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1.5rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav a:hover {
  color: var(--text);
}

.btn {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.12s ease;
}

.btn-icon {
  flex-shrink: 0;
}

.btn-cta {
  background: var(--text);
  color: #0a0a0a;
}

.btn-cta:hover {
  opacity: 0.92;
}

.btn-cta:active {
  transform: scale(0.98);
}

@media (max-width: 900px) {
  .header-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .brand {
    justify-self: center;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .btn {
    justify-self: center;
    order: 2;
  }
}

@media (max-width: 640px) {
  .nav a {
    font-size: 0.78rem;
  }

  .brand {
    font-size: 0.9375rem;
  }
}

/* Hero */
.hero {
  padding: 3rem 0 1rem;
  text-align: center;
}

@media (max-width: 640px) {
  .hero {
    padding: 2rem 0 0.5rem;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 auto 1.25rem;
  padding: 0.25rem 0.25rem 0.25rem 0.35rem;
  border-radius: var(--radius-pill);
  background: var(--text);
  color: #0a0a0a;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-new {
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  background: #0a0a0a;
  color: var(--text);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-line {
  padding-left: 0.35rem;
  padding-right: 0.65rem;
  color: #0a0a0a;
  font-weight: 500;
}

@media (max-width: 640px) {
  .hero-badge {
    flex-wrap: wrap;
    justify-content: center;
    font-size: 0.7rem;
  }

  .badge-line {
    width: 100%;
    text-align: center;
    padding: 0.15rem 0.5rem 0.35rem;
  }
}

.hero-title {
  margin: 0 auto 1.125rem;
  max-width: 22ch;
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
}

@media (max-width: 640px) {
  .hero-title {
    max-width: none;
    font-size: clamp(1.4rem, 5.2vw, 1.9rem);
    letter-spacing: -0.025em;
  }
}

.hero-desc {
  margin: 0 auto 2.25rem;
  max-width: 48ch;
  font-size: clamp(0.875rem, 1.35vw, 1rem);
  color: var(--muted);
  font-weight: 400;
  line-height: 1.75;
}

@media (max-width: 640px) {
  .hero-desc {
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
  }
}

/* Motion — subtle only */
.animate-fade-up {
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-chat-in {
  opacity: 0;
  transform: translateY(14px);
  animation: chatIn 0.75s cubic-bezier(0.22, 1, 0.36, 1) 0.25s forwards;
}

@keyframes chatIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Terminal / panel */
.chat-panel {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

@media (max-width: 640px) {
  .chat-panel {
    max-width: none;
    margin: 0;
  }
}

.chat-surface {
  border-radius: var(--radius-panel);
  border: 1px solid var(--border);
  background: var(--panel);
  overflow: hidden;
}

/* Tabs — opencode strip */
.panel-tabs {
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted-2);
  text-transform: lowercase;
}

.panel-tab {
  padding: 0.65rem 0.85rem;
  cursor: default;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.12s ease;
}

.panel-tab:hover {
  color: var(--muted);
}

.panel-tab.is-active {
  color: var(--text);
  border-bottom-color: var(--text);
}

/* Command row */
.panel-command {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--panel-2);
}

.panel-command-text {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--muted);
  word-break: break-all;
}

.copy-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.12s ease, background 0.12s ease;
}

.copy-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.chat-body {
  min-height: 220px;
  max-height: min(48vh, 360px);
  overflow-y: auto;
  padding: 1rem 1rem 0.5rem;
  background: var(--panel);
  scroll-behavior: smooth;
}

@media (max-width: 640px) {
  .chat-body {
    min-height: 200px;
    max-height: min(40vh, 300px);
  }
}

.msg {
  margin-bottom: 1rem;
  text-align: right;
}

.msg-meta {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  color: var(--muted-2);
  margin-bottom: 0.35rem;
  letter-spacing: 0.02em;
  text-transform: lowercase;
}

.msg-bubble {
  display: inline-block;
  max-width: 92%;
  padding: 0.7rem 0.95rem;
  border-radius: 6px;
  font-size: 0.875rem;
  line-height: 1.65;
  font-family: var(--font-sans);
}

.assistant-bubble {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-top-right-radius: 2px;
}

.msg-user {
  text-align: left;
}

.msg-user .msg-meta {
  text-align: left;
}

.user-bubble {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  border-top-left-radius: 2px;
}

.msg-enter {
  animation: msgIn 0.35s ease-out both;
}

@keyframes msgIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.msg-error .msg-bubble {
  border-color: #3f3f46;
  background: #1c1010;
  color: #fca5a5;
}

.typing-row {
  padding: 0 1rem 0.35rem;
  background: var(--panel);
}

.typing-indicator {
  display: inline-flex;
  gap: 4px;
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}

.typing-indicator span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--muted);
  opacity: 0.4;
  animation: bounce 1.1s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.12s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.24s;
}

@keyframes bounce {
  0%,
  80%,
  100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

.chat-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem 0.85rem;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.chat-form input {
  flex: 1;
  min-width: 0;
  padding: 0.6rem 0.85rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.12s ease;
}

.chat-form input::placeholder {
  color: var(--muted-2);
}

.chat-form input:focus {
  border-color: var(--muted);
}

.send-btn {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--text);
  color: #0a0a0a;
  cursor: pointer;
  transition: opacity 0.12s ease, transform 0.1s ease;
}

.send-btn:hover:not(:disabled) {
  opacity: 0.9;
}

.send-btn:active:not(:disabled) {
  transform: scale(0.97);
}

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.site-footer {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.6875rem;
  color: var(--muted-2);
}

.chat-body::-webkit-scrollbar {
  width: 5px;
}

.chat-body::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}