/* ============================================================
   ESP32 Flasher — Terminal / Dev-Tool Aesthetic
   Fonts: IBM Plex Mono (code) + Outfit (UI)
   ============================================================ */

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

:root {
  /* Surface */
  --bg-0: #0a0c10;
  --bg-1: #0f1218;
  --bg-2: #161a22;
  --bg-3: #1e2430;
  --border: #262d3a;
  --border-bright: #3a4456;

  /* Text */
  --t1: #e2e8f0;
  --t2: #8c96a8;
  --t3: #5a6378;

  /* Accent — electric cyan */
  --acc: #22d3ee;
  --acc-dim: rgba(34, 211, 238, .12);
  --acc-glow: rgba(34, 211, 238, .25);

  /* Semantic */
  --green: #34d399;
  --green-dim: rgba(52, 211, 153, .12);
  --red: #f87171;
  --red-dim: rgba(248, 113, 113, .12);
  --amber: #fbbf24;
  --amber-dim: rgba(251, 191, 36, .12);

  /* Type */
  --mono: 'IBM Plex Mono', 'SF Mono', 'Fira Code', monospace;
  --sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Misc */
  --radius: 6px;
  --transition: 120ms ease;
}

html { font-size: 15px; }

body {
  font-family: var(--sans);
  background: var(--bg-0);
  color: var(--t1);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-bright); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  font-family: var(--sans); font-weight: 500; font-size: .8125rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-2); color: var(--t1);
  padding: .45rem .9rem; min-height: 36px;
  cursor: pointer; transition: all var(--transition); white-space: nowrap;
  user-select: none;
}
.btn:hover { background: var(--bg-3); border-color: var(--border-bright); }
.btn:focus-visible { outline: 2px solid var(--acc); outline-offset: 2px; }

.btn-sm { min-height: 30px; padding: .3rem .65rem; font-size: .75rem; }

.btn-accent {
  background: var(--acc-dim); color: var(--acc); border-color: rgba(34,211,238,.25);
}
.btn-accent:hover { background: rgba(34,211,238,.2); border-color: var(--acc); }

.btn-glow {
  background: var(--acc); color: var(--bg-0); border: none;
  font-weight: 600; font-size: .9375rem;
  padding: .65rem 2.5rem; min-height: 44px; border-radius: 8px;
  box-shadow: 0 0 20px var(--acc-glow), 0 0 60px rgba(34,211,238,.08);
  transition: all 200ms ease;
}
.btn-glow:hover {
  background: #67e8f9; box-shadow: 0 0 30px var(--acc-glow), 0 0 80px rgba(34,211,238,.15);
  transform: translateY(-1px);
}

.btn-ghost { background: transparent; border-color: transparent; color: var(--t2); }
.btn-ghost:hover { color: var(--t1); background: var(--bg-2); }

.btn-danger { background: var(--red-dim); color: var(--red); border-color: rgba(248,113,113,.25); }
.btn-danger:hover { background: rgba(248,113,113,.2); border-color: var(--red); }

.btn-danger-text { color: var(--red); }
.btn-danger-text:hover { color: #fca5a5; }

/* ===== Pages ===== */
.page[hidden] { display: none !important; }

/* ===== Banner Warning ===== */
.banner-warning {
  align-items: center; gap: .5rem; justify-content: center;
  background: var(--amber-dim); border-bottom: 1px solid rgba(251,191,36,.2);
  color: var(--amber); font-size: .8125rem; padding: .5rem 1rem;
}
.banner-warning:not([hidden]) {
  display: flex;
}
.banner-warning svg { flex-shrink: 0; }

/* ===== LOGIN ===== */
.page-login {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; position: relative; overflow: hidden;
}
.login-container { position: relative; z-index: 1; }
.login-glow {
  position: absolute; top: 50%; left: 50%;
  width: 500px; height: 500px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(34,211,238,.06) 0%, transparent 70%);
  pointer-events: none;
}
.login-card {
  text-align: center; position: relative;
  padding: 3rem 2.5rem;
}
.login-icon {
  color: var(--acc); margin-bottom: 1.5rem;
  animation: login-pulse 3s ease-in-out infinite;
}
@keyframes login-pulse {
  0%, 100% { opacity: .7; }
  50% { opacity: 1; }
}
.login-card h1 {
  font-family: var(--sans); font-size: 2rem; font-weight: 700;
  letter-spacing: -.03em; margin-bottom: .5rem;
}
.login-subtitle { color: var(--t2); font-size: .9375rem; margin-bottom: 2rem; }
.login-hint { color: var(--t3); font-size: .75rem; margin-top: 1.5rem; }

/* ===== TITLEBAR ===== */
.titlebar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1rem; height: 40px;
  background: var(--bg-1); border-bottom: 1px solid var(--border);
  font-size: .8125rem;
}
.titlebar-left { display: flex; align-items: center; gap: .5rem; }
.titlebar-icon { color: var(--acc); display: flex; }
.titlebar-name { font-weight: 600; color: var(--t1); }
.titlebar-sep { color: var(--t3); }
.titlebar-page { color: var(--t2); font-family: var(--mono); font-size: .75rem; }

/* ===== STATUS STRIP ===== */
.status-strip {
  display: flex; align-items: center; gap: .75rem;
  padding: .4rem 1rem;
  background: var(--bg-1); border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.status-chip {
  display: flex; align-items: center; gap: .35rem;
  font-family: var(--mono); font-size: .6875rem;
  padding: .2rem .55rem; border-radius: 4px;
  background: var(--bg-2); border: 1px solid var(--border);
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--red); flex-shrink: 0;
  box-shadow: 0 0 4px var(--red);
  transition: all 300ms ease;
}
.status-dot.connected {
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: dot-glow 2s ease-in-out infinite;
}
@keyframes dot-glow {
  0%, 100% { box-shadow: 0 0 4px var(--green); }
  50% { box-shadow: 0 0 10px var(--green); }
}
.status-chip-label { color: var(--t3); text-transform: uppercase; letter-spacing: .05em; }
.status-chip-value { color: var(--t2); }
.status-strip-actions { margin-left: auto; display: flex; gap: .4rem; }

/* ===== PROGRESS STRIP ===== */
.progress-strip {
  display: flex; align-items: center; gap: .75rem;
  padding: .35rem 1rem;
  background: var(--bg-1); border-bottom: 1px solid var(--border);
}
.progress-track {
  flex: 1; height: 4px; background: var(--bg-3); border-radius: 2px; overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%; border-radius: 2px;
  background: linear-gradient(90deg, var(--acc), var(--green));
  transition: width 200ms ease;
  box-shadow: 0 0 8px var(--acc-glow);
}
.progress-label {
  font-family: var(--mono); font-size: .6875rem; color: var(--acc);
  min-width: 3ch; text-align: right; font-variant-numeric: tabular-nums;
}

/* ===== MAIN GRID ===== */
.grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 0;
  height: calc(100vh - 40px - 36px); /* minus titlebar + status strip */
}
/* Adjust when progress is visible */
.progress-strip:not([hidden]) ~ .grid {
  height: calc(100vh - 40px - 36px - 33px);
}

/* ===== PANELS ===== */
.panel {
  display: flex; flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--bg-0);
  overflow: hidden;
}
.panel:last-child { border-right: none; }

.panel-header {
  display: flex; align-items: center; gap: .5rem;
  padding: .4rem .75rem;
  background: var(--bg-1); border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.panel-tab {
  font-family: var(--mono); font-size: .6875rem; font-weight: 500;
  color: var(--t2); text-transform: uppercase; letter-spacing: .06em;
}
.panel-tab.active { color: var(--t1); }
.panel-badge {
  font-family: var(--mono); font-size: .625rem; font-weight: 500;
  color: var(--t3); background: var(--bg-3);
  padding: .05rem .4rem; border-radius: 3px;
}

.panel-body { padding: .75rem; }

/* ===== TERMINAL (Activity Feed) ===== */
.panel-terminal { min-height: 0; }

.terminal-body {
  flex: 1; overflow-y: auto;
  font-family: var(--mono); font-size: .75rem; line-height: 1.7;
  padding: .5rem .75rem;
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0px,
      transparent 22px,
      rgba(255,255,255,.012) 22px,
      rgba(255,255,255,.012) 23px
    );
}

.log-entry {
  display: flex; gap: .6rem;
  animation: log-in 150ms ease;
}
@keyframes log-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.log-ts {
  color: var(--t3); flex-shrink: 0;
  user-select: none;
}
.log-msg { word-break: break-word; }
.log-entry.info .log-msg { color: var(--t2); }
.log-entry.success .log-msg { color: var(--green); }
.log-entry.error .log-msg { color: var(--red); }

/* ===== RIGHT COLUMN STACK ===== */
.panel-stack {
  display: flex; flex-direction: column;
  border-left: 1px solid var(--border);
  min-height: 0;
}

/* Skill panel */
.panel-compact { flex-shrink: 0; }
.panel-compact .panel-body { padding: .6rem .75rem; }
.skill-row {
  display: flex; align-items: center; gap: .6rem;
  margin-bottom: .4rem;
}
.key-preview {
  font-family: var(--mono); font-size: .6875rem; color: var(--t3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.skill-regen {
  padding-top: .2rem;
  border-top: 1px solid var(--border);
}

/* History panel */
.panel-history {
  flex: 1; min-height: 0;
}
.history-body {
  flex: 1; overflow-y: auto; padding: .5rem .75rem;
  display: flex; flex-direction: column; gap: .5rem;
}

.sketch-card {
  background: var(--bg-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .6rem .75rem;
  transition: border-color var(--transition);
}
.sketch-card:hover { border-color: var(--border-bright); }

.sketch-card-top {
  display: flex; align-items: start; justify-content: space-between; gap: .4rem;
}
.sketch-card-title {
  font-size: .8125rem; font-weight: 500; color: var(--t1);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.sketch-card-time {
  font-family: var(--mono); font-size: .625rem; color: var(--t3);
  flex-shrink: 0;
}

.sketch-card-meta {
  display: flex; align-items: center; gap: .4rem; margin-top: .3rem;
}
.badge {
  font-family: var(--mono); font-size: .625rem; font-weight: 500;
  padding: .1rem .4rem; border-radius: 3px;
}
.badge-ok { background: var(--green-dim); color: var(--green); }
.badge-err { background: var(--red-dim); color: var(--red); }
.badge-pending { background: var(--amber-dim); color: var(--amber); }

.sketch-card-actions { margin-top: .4rem; }

/* Collapsible error */
.collapsible-toggle {
  font-family: var(--mono); font-size: .6875rem;
  color: var(--acc); background: none; border: none;
  cursor: pointer; padding: 0;
}
.collapsible-toggle:hover { text-decoration: underline; }
.collapsible-content {
  display: none; margin-top: .35rem;
  padding: .4rem .5rem;
  background: var(--bg-0); border-radius: 4px;
  font-family: var(--mono); font-size: .6875rem; line-height: 1.5;
  color: var(--red); white-space: pre-wrap; max-height: 150px; overflow-y: auto;
}
.collapsible-content.open { display: block; }

/* ===== Empty State ===== */
.empty-state {
  text-align: center; padding: 2rem 1rem;
  color: var(--t3); font-size: .8125rem;
  font-family: var(--mono);
}

/* ===== Toast ===== */
#toast-container {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 9999;
  display: flex; flex-direction: column-reverse; gap: .4rem;
  pointer-events: none;
}
.toast {
  font-family: var(--mono); font-size: .75rem; font-weight: 500;
  padding: .5rem .85rem; border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.5);
  pointer-events: auto;
  animation: toast-in 180ms ease, toast-out 180ms ease 2.8s forwards;
}
.toast.info { background: var(--bg-3); border: 1px solid var(--border-bright); color: var(--t1); }
.toast.success { background: var(--green-dim); border: 1px solid rgba(52,211,153,.3); color: var(--green); }
.toast.error { background: var(--red-dim); border: 1px solid rgba(248,113,113,.3); color: var(--red); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(.5rem); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ===== Responsive ===== */
@media (max-width: 800px) {
  .grid {
    grid-template-columns: 1fr;
    height: auto;
  }
  .panel-terminal {
    min-height: 50vh;
  }
  .panel-stack {
    border-left: none;
    border-top: 1px solid var(--border);
  }
  .panel-history {
    min-height: 40vh;
  }
  .status-strip {
    flex-wrap: wrap;
  }
  .status-strip-actions {
    width: 100%; margin-left: 0; margin-top: .3rem;
  }
}