/* ============================================================
   Reset & Base
   ============================================================ */

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

:root {
  --bg:       #0f0f13;
  --surface:  #18181f;
  --surface2: #1f1f28;
  --border:   rgba(255,255,255,0.07);
  --accent:   #7c6af5;
  --accent2:  #a89bfa;
  --text:     #e4e4ea;
  --text2:    #8a8a9a;
  --text3:    #55555f;
  --danger:   #f56c6c;
  --radius:   12px;
  --radius2:  8px;
  --ease:     cubic-bezier(0.16, 1, 0.3, 1);
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button { cursor: pointer; font-family: inherit; }
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   Layout
   ============================================================ */

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px 60px;
  min-height: 100vh;
}

/* ============================================================
   Header
   ============================================================ */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.3px;
}

.logo svg {
  color: var(--accent2);
  flex-shrink: 0;
}

/* ============================================================
   Alert banner
   ============================================================ */

.alert-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(124, 106, 245, 0.1);
  border: 1px solid rgba(124, 106, 245, 0.25);
  border-radius: var(--radius2);
  color: var(--text2);
  font-size: 13px;
  margin-bottom: 20px;
  animation: fadeSlideIn 0.4s var(--ease);
}

.alert-banner svg { color: var(--accent2); flex-shrink: 0; }

.link-btn {
  background: none;
  border: none;
  color: var(--accent2);
  font-size: inherit;
  padding: 0;
  text-decoration: underline;
  cursor: pointer;
}

/* ============================================================
   Form
   ============================================================ */

.prompt-row {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.prompt-row:focus-within {
  border-color: rgba(124, 106, 245, 0.4);
}

textarea {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.6;
  padding: 14px 16px 10px;
  resize: none;
  border-radius: var(--radius);
}

textarea::placeholder { color: var(--text3); }

.prompt-footer {
  display: flex;
  justify-content: flex-end;
  padding: 0 14px 10px;
}

.char-count {
  font-size: 11px;
  color: var(--text3);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   Controls row
   ============================================================ */

.controls {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-top: 14px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.control-group label {
  font-size: 12px;
  color: var(--text2);
  font-weight: 500;
  padding-left: 2px;
}

select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 9px 12px;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8a9a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
  transition: border-color 0.2s;
}

select:focus { border-color: rgba(124, 106, 245, 0.4); }

/* ============================================================
   Generate button
   ============================================================ */

.generate-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius2);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  height: 42px;
  transition: background 0.2s, transform 0.15s var(--ease), opacity 0.2s;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.generate-btn:hover:not(:disabled) {
  background: var(--accent2);
  transform: translateY(-1px);
}

.generate-btn:active:not(:disabled) {
  transform: translateY(0);
}

.generate-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.generate-btn .spinner {
  display: none;
  animation: spin 0.9s linear infinite;
}

.generate-btn.loading .btn-icon,
.generate-btn.loading .btn-text {
  display: none;
}

.generate-btn.loading .spinner {
  display: inline;
}

/* ============================================================
   Error
   ============================================================ */

.error-msg {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 14px;
  background: rgba(245, 108, 108, 0.1);
  border: 1px solid rgba(245, 108, 108, 0.2);
  border-radius: var(--radius2);
  color: var(--danger);
  font-size: 13px;
  animation: fadeSlideIn 0.3s var(--ease);
}

/* ============================================================
   Result area
   ============================================================ */

.result-area {
  margin-top: 28px;
  animation: fadeSlideIn 0.5s var(--ease);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

#resultLabel {
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.result-actions {
  display: flex;
  gap: 8px;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  color: var(--text2);
  font-size: 12px;
  padding: 6px 12px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.action-btn:hover {
  background: var(--surface2);
  color: var(--text);
  border-color: rgba(255,255,255,0.12);
}

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

.image-wrap img {
  display: block;
  width: 100%;
  height: auto;
}

@keyframes popIn {
  0%   { opacity: 0; transform: scale(0.96); }
  100% { opacity: 1; transform: scale(1); }
}

.pop-in {
  animation: popIn 0.4s var(--ease);
}

/* ============================================================
   Icon button
   ============================================================ */

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text2);
  border-radius: var(--radius2);
  width: 36px;
  height: 36px;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.icon-btn:hover {
  background: var(--surface);
  color: var(--text);
}

/* ============================================================
   Modal
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
  z-index: 100;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 420px;
  transform: translateY(12px) scale(0.97);
  transition: transform 0.3s var(--ease);
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 0;
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.modal-body {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
}

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

.input-row input {
  flex: 1;
}

input[type="text"],
input[type="password"] {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 9px 12px;
  outline: none;
  width: 100%;
  transition: border-color 0.2s;
}

input:focus { border-color: rgba(124, 106, 245, 0.4); }

.field-hint {
  font-size: 11px;
  color: var(--text3);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 0 20px 18px;
}

.btn-secondary {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  color: var(--text2);
  font-family: inherit;
  font-size: 14px;
  padding: 8px 18px;
  transition: background 0.15s, color 0.15s;
}

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

.btn-primary {
  background: var(--accent);
  border: none;
  border-radius: var(--radius2);
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  transition: background 0.15s;
}

.btn-primary:hover { background: var(--accent2); }

/* ============================================================
   Animations
   ============================================================ */

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

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 480px) {
  .controls { flex-direction: column; }
  .control-group { width: 100%; }
  .generate-btn { width: 100%; justify-content: center; }
  .result-actions { gap: 6px; }
  .action-btn { padding: 6px 10px; }
}