/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d1117;
  --surface:   #161b22;
  --border:    #30363d;
  --text:      #c9d1d9;
  --muted:     #8b949e;
  --blue:      #58a6ff;
  --green:     #3fb950;
  --red:       #f85149;
  --yellow:    #d29922;
  --radius:    8px;
  --font:      'Courier New', Courier, monospace;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== SCREENS ===== */
.screen { display: none; }
.screen.active { display: flex; }
.screen.hidden { display: none; }

/* ===== AUTH ===== */
#screen-auth {
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
}

.logo-icon {
  font-size: 2.5rem;
  color: var(--blue);
  margin-bottom: 10px;
  display: block;
}

.logo h1 {
  font-size: 1.4rem;
  color: var(--text);
  letter-spacing: 2px;
  text-transform: uppercase;
  line-height: 1.3;
}

.logo h1 span {
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 3px;
}

.auth-subtitle {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 28px;
  line-height: 1.6;
}

.auth-box label {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 8px;
  text-align: left;
}

.input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.input-row input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.1rem;
  letter-spacing: 4px;
  outline: none;
  text-align: center;
  transition: border-color 0.2s;
}

.input-row input:focus { border-color: var(--blue); }

.input-row button {
  padding: 10px 20px;
  background: var(--blue);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font);
  font-size: 0.9rem;
  cursor: pointer;
  transition: opacity 0.2s;
}

.input-row button:hover { opacity: 0.85; }

.auth-hint {
  font-size: 0.72rem;
  color: #484f58;
  margin-top: 14px;
}

/* ===== HEADER ===== */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  font-size: 1rem;
  color: var(--blue);
  letter-spacing: 1px;
  font-weight: bold;
}

.header-meta {
  font-size: 0.75rem;
  color: var(--muted);
}

/* ===== MAIN ===== */
#screen-main { flex-direction: column; min-height: 100vh; }
main { padding: 28px 20px; max-width: 860px; margin: 0 auto; width: 100%; }

/* ===== STEPS ===== */
.steps { display: flex; flex-direction: column; gap: 24px; }

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

.step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: #0d1117aa;
}

.step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-header h2 {
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: 0.5px;
  flex: 1;
}

.step-body { padding: 20px; }

.step-desc {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.6;
}

.step-note {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 10px;
  font-style: italic;
}

/* ===== FIRMWARE INFO ===== */
.firmware-info {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 16px;
}

.fw-label {
  font-size: 0.72rem;
  color: var(--muted);
  background: #21262d;
  padding: 2px 8px;
  border-radius: 4px;
}

.fw-version {
  font-size: 0.85rem;
  color: var(--green);
}

/* ===== FLASH BUTTON ===== */
.btn-flash {
  padding: 12px 28px;
  background: #238636;
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
  letter-spacing: 0.5px;
}
.btn-flash:hover { background: #2ea043; }

/* ===== ESPTOOL FALLBACK (V3) ===== */
.esptool-warning-box {
  margin-top: 16px;
  background: #2a1a00;
  border: 1px solid #7d4e00;
  border-left: 4px solid #f0a500;
  border-radius: 6px;
  padding: 14px 16px;
}
.esptool-warning-title {
  font-weight: 700;
  color: #f0a500;
  margin: 0 0 6px 0;
  font-size: 0.95rem;
}
.esptool-warning-text {
  color: #c9d1d9;
  margin: 0 0 10px 0;
  font-size: 0.88rem;
  line-height: 1.5;
}
.esptool-steps {
  color: #c9d1d9;
  font-size: 0.88rem;
  padding-left: 20px;
  margin: 0 0 12px 0;
}
.esptool-steps li { margin-bottom: 4px; }
.btn-flash-esptool {
  display: inline-block;
  background: #1a3a6a;
  color: #79b8ff;
  border: 1px solid #2d6ac4;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 10px;
  transition: background 0.15s;
}
.btn-flash-esptool:hover { background: #1f4580; }
.esptool-warning-note {
  color: #8b949e;
  font-size: 0.82rem;
  margin: 0;
}
.esptool-warning-note code { color: #79b8ff; font-size: 0.82rem; }

/* ===== FORM ===== */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  /* Layout */
  .form-grid { grid-template-columns: 1fr; }
  header { padding: 10px 14px; }
  main { padding: 12px 10px; }
  .step-header { padding: 10px 12px; gap: 8px; }
  .step-body { padding: 12px 10px; }

  /* Auth box */
  .auth-box { padding: 28px 16px; }
  .input-row { flex-direction: column; gap: 8px; }
  .input-row input { font-size: 1.3rem; letter-spacing: 6px; }
  .input-row button { width: 100%; padding: 12px; }

  /* Inputs agrandis pour le touch */
  .field input, .field select {
    padding: 11px 10px;
    font-size: 1rem;
  }
  .input-row input { font-size: 1.2rem; }

  /* Rows en colonne sauf radio */
  .field-row { flex-direction: column; gap: 0; }
  .field-row.radio-row { flex-direction: row; flex-wrap: wrap; gap: 12px; }
  .field.grow, .field.short { flex: 1 1 auto; min-width: 0; }
  .checkbox-field { flex: 0 0 auto; flex-direction: row; gap: 8px; align-items: center; }

  /* Firmware info */
  .firmware-info { flex-wrap: wrap; gap: 6px; }

  /* Boutons full width */
  .apply-row { justify-content: stretch; }
  .btn-apply { width: 100%; padding: 14px; font-size: 1rem; }
  .btn-flash { width: 100%; padding: 14px; font-size: 1rem; }

  /* Terminal */
  #terminal { height: 200px; font-size: 0.78rem; }
  .term-input-row input { font-size: 1rem; }
  .term-input-row button { padding: 8px 12px; }

  /* Footer */
  .footer-ascii { display: none; }
  .footer-credits { font-size: 0.68rem; gap: 8px; }
}

fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--bg);
}

legend {
  font-size: 0.75rem;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-section-apply {
  padding: 2px 8px;
  background: transparent;
  border: 1px solid var(--blue);
  border-radius: 4px;
  color: var(--blue);
  font-family: var(--font);
  font-size: 0.65rem;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: background 0.2s;
  text-transform: none;
}
.btn-section-apply:hover { background: #0c1929; }

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 12px;
}

.field label {
  font-size: 0.75rem;
  color: var(--muted);
}

.hint {
  font-size: 0.7rem;
  color: #484f58;
}

.field input, .field select {
  padding: 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}

.field input:focus, .field select:focus { border-color: var(--blue); }

.field-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.field-row .field { flex: 1; }
.field.grow { flex: 2; }
.field.short { flex: 0 0 90px; }

.radio-row {
  margin-top: 12px;
  align-items: center;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text);
  cursor: pointer;
}

.radio-label input[type="radio"] { accent-color: var(--blue); }
.radio-label.disabled { opacity: 0.35; cursor: not-allowed; pointer-events: none; }

.coord-hint {
  display: block;
  font-size: 0.72rem;
  margin-top: 4px;
  color: var(--muted);
  font-style: italic;
}
.coord-hint.not-provided { color: var(--yellow); }

.term-shortcuts-diag { margin-top: 6px; border-top: 1px solid var(--border); padding-top: 8px; }
.shortcuts-label { font-size: 0.72rem; color: var(--muted); margin-right: 4px; }
.btn-diag { border-color: rgba(210,153,34,0.4); color: var(--yellow); }
.btn-diag:hover { border-color: var(--yellow); background: rgba(210,153,34,0.08); }

.srr-note {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(210, 153, 34, 0.1);
  border-left: 3px solid var(--yellow);
  border-radius: 4px;
  font-size: 0.78rem;
  color: var(--text);
  line-height: 1.5;
}
.srr-note code {
  background: rgba(255,255,255,0.07);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font);
  color: var(--blue);
}

.checkbox-field {
  flex: 0 0 70px;
  align-items: center;
}

.checkbox-field input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--blue);
  margin-top: 4px;
}

/* ===== APPLY BUTTON ===== */
.apply-row {
  margin-top: 20px;
  display: flex;
  justify-content: flex-end;
}

.btn-apply {
  padding: 11px 28px;
  background: var(--blue);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font);
  font-size: 0.9rem;
  cursor: pointer;
  transition: opacity 0.2s;
  letter-spacing: 0.5px;
}
.btn-apply:hover { opacity: 0.85; }
.btn-apply:disabled { opacity: 0.4; cursor: not-allowed; }

/* ===== TERMINAL ===== */
#terminal {
  background: #010409;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  height: 280px;
  overflow-y: auto;
  font-size: 0.82rem;
  line-height: 1.7;
  margin-bottom: 10px;
  white-space: pre-wrap;
  word-break: break-all;
}

.term-line-tx   { color: var(--blue); }
.term-line-rx   { color: var(--green); }
.term-line-err  { color: var(--red); }
.term-line-info { color: var(--muted); }
.term-line-ok   { color: var(--green); font-weight: bold; }

.term-input-row {
  display: flex;
  gap: 8px;
}

.term-input-row input {
  flex: 1;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  outline: none;
}
.term-input-row input:focus { border-color: var(--blue); }

.term-input-row button {
  padding: 8px 18px;
  background: #21262d;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s;
}
.term-input-row button:hover { background: #30363d; }

.term-shortcuts {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.btn-shortcut {
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--blue);
  font-family: var(--font);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.btn-shortcut:hover { background: #0c1929; border-color: var(--blue); }

.btn-clear-term {
  padding: 4px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.72rem;
  cursor: pointer;
  margin-left: auto;
  transition: border-color 0.2s;
}
.btn-clear-term:hover { border-color: var(--red); color: var(--red); }

.btn-disconnect {
  padding: 4px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.72rem;
  cursor: pointer;
  margin-left: auto;
  transition: border-color 0.2s;
}
.btn-disconnect:hover { border-color: var(--yellow); color: var(--yellow); }

/* ===== MISC ===== */
/* ===== FOOTER ===== */
.site-footer {
  margin-top: 48px;
  padding: 28px 20px 32px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-ascii {
  font-family: var(--font);
  font-size: 0.5rem;
  line-height: 1.15;
  color: #21262d;
  margin: 0 auto 16px;
  letter-spacing: 0.5px;
  user-select: none;
}

.footer-credits {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  font-size: 0.78rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.footer-dev { color: var(--blue); }
.footer-support { color: var(--muted); }
.footer-sep { color: #21262d; font-size: 0.6rem; }
.footer-credits .accent { color: #30363d; }

/* ===== CMD HELP ===== */
.cmd-help {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.cmd-help summary {
  padding: 8px 14px;
  font-size: 0.78rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  letter-spacing: 0.5px;
}

.cmd-help summary:hover { color: var(--blue); }

.cmd-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 14px;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  .cmd-grid { grid-template-columns: 1fr; }
}

.cmd-group-title {
  font-size: 0.7rem;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.cmd-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 3px 0;
  border-bottom: 1px solid #21262d;
  font-size: 0.75rem;
}

.cmd-row code {
  color: var(--green);
  font-family: var(--font);
  white-space: nowrap;
  flex-shrink: 0;
}

.cmd-row span {
  color: var(--muted);
  text-align: right;
}

/* ===== DEVICE SELECTOR ===== */
.device-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.device-label {
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.device-selector select {
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--blue);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  flex: 1;
  max-width: 420px;
}

.device-selector select:focus { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue); }

/* ===== TX POWER INFO ===== */
.tx-hint-box {
  padding: 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--green);
  font-size: 0.8rem;
  height: 100%;
  display: flex;
  align-items: center;
}

/* ===== MISC ===== */
.error { color: var(--red); font-size: 0.8rem; margin-top: 6px; }
.hidden { display: none !important; }