* { box-sizing: border-box; }
:root {
  --bg: #070b16;
  --panel: #0e1526;
  --panel-2: #121a30;
  --border: #202b46;
  --text: #e8ecf7;
  --text-dim: #8a93ac;
  --accent: #4f7cff;
  --accent-2: #22d3ee;
  --accent-grad: linear-gradient(135deg, #4f7cff 0%, #22d3ee 100%);
  --danger: #ff6b6b;
}

html, body {
  height: 100%;
}
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(79,124,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,124,255,0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 90%);
  pointer-events: none;
}
.bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 700px;
  background: radial-gradient(ellipse at center, rgba(79,124,255,0.22) 0%, rgba(34,211,238,0.10) 45%, transparent 70%);
  filter: blur(10px);
  z-index: 0;
  pointer-events: none;
}

.view { min-height: 100vh; position: relative; z-index: 1; }

#login-view {
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
  padding: 44px 40px;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.04);
  width: 360px;
  backdrop-filter: blur(6px);
}
.brand { text-align: center; margin-bottom: 28px; }
.brand-mark {
  width: 56px; height: 56px;
  margin: 0 auto 14px;
  border-radius: 14px;
  object-fit: cover;
  display: block;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}
.brand-mark.small { width: 36px; height: 36px; margin: 0; }
.login-box h1 { font-size: 19px; margin: 0 0 4px; font-weight: 600; letter-spacing: 0.3px; }
.brand-sub { font-size: 12px; color: var(--text-dim); letter-spacing: 1.5px; text-transform: uppercase; margin: 0; }

.login-box input {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #0a0f1e;
  color: var(--text);
}
.login-box input::placeholder { color: var(--text-dim); }
.login-box input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,124,255,0.15); }

.login-box button, #generate-btn, .modal-actions button {
  width: 100%;
  padding: 12px;
  background: var(--accent-grad);
  color: #05070f;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
}
.login-box button:hover, #generate-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.login-box button:active, #generate-btn:active { transform: translateY(0); }
.error { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 8px; }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  background: rgba(14,21,38,0.7);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand-row { display: flex; align-items: center; gap: 12px; }
header h1 { font-size: 17px; margin: 0; font-weight: 600; letter-spacing: 0.3px; }
.header-right { display: flex; align-items: center; gap: 18px; font-size: 14px; color: var(--text-dim); }
.link-btn {
  background: none; border: none; color: var(--accent-2); cursor: pointer; font-size: 14px; padding: 0;
}
.link-btn:hover { color: var(--text); }

main { max-width: 920px; margin: 32px auto; padding: 0 16px; }

.input-panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.005));
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.input-panel label { display: block; margin-bottom: 8px; font-size: 13px; color: var(--text-dim); letter-spacing: 0.3px; }
#topic-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  resize: vertical;
  margin-bottom: 18px;
  background: #0a0f1e;
  color: var(--text);
  font-family: inherit;
}
#topic-input:focus { outline: none; border-color: var(--accent); }

.platform-select { display: flex; gap: 12px; font-size: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.platform-chip {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 10px 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #0a0f1e;
  transition: border-color 0.15s, background 0.15s;
}
.platform-chip:has(input:checked) {
  border-color: var(--accent);
  background: rgba(79,124,255,0.12);
}
.platform-chip label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.platform-chip input { accent-color: var(--accent); }

.mini-stepper {
  display: flex; align-items: center; gap: 0;
  border-left: 1px solid var(--border);
  padding-left: 10px;
}
.mini-stepper-btn {
  width: 22px; height: 22px;
  background: none; border: none; color: var(--text);
  cursor: pointer; font-size: 13px; padding: 0;
}
.mini-stepper-btn:hover { color: var(--accent-2); }
.mini-stepper-value { min-width: 18px; text-align: center; font-size: 13px; font-weight: 600; }

.image-count-select { display: flex; align-items: center; gap: 10px; }
.image-count-label { font-size: 13px; color: var(--text-dim); }
.stepper {
  display: flex; align-items: center; gap: 2px;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: #0a0f1e;
}
.stepper-btn {
  width: 30px; height: 30px;
  background: none; border: none; color: var(--text);
  cursor: pointer; font-size: 15px;
}
.stepper-btn:hover { background: rgba(79,124,255,0.15); }
#image-count-value { min-width: 22px; text-align: center; font-size: 14px; font-weight: 600; }

#generate-btn { width: auto; padding: 12px 32px; }
.hint { font-size: 13px; color: var(--text-dim); margin-top: 12px; }

#results-panel { margin-top: 28px; }
.tabs { display: flex; gap: 8px; margin-bottom: 0; }
.tab-btn {
  padding: 10px 22px;
  border: 1px solid var(--border);
  border-bottom: none;
  background: #0a0f1e;
  color: var(--text-dim);
  border-radius: 10px 10px 0 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}
.tab-btn.active { background: var(--panel); color: var(--text); border-color: var(--border); }

.tab-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: 0 12px 12px 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.tab-panel h3 { margin-top: 0; font-size: 16px; font-weight: 600; }
.field-label { font-size: 12px; color: var(--text-dim); margin: 16px 0 8px; letter-spacing: 0.3px; text-transform: uppercase; }
.content-box {
  width: 100%;
  min-height: 280px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.7;
  resize: vertical;
  background: #0a0f1e;
  color: var(--text);
  font-family: inherit;
}
.title-box { min-height: auto; background: #0a0f1e; color: var(--text-dim); padding: 12px 14px; border-radius: 8px; border: 1px solid var(--border); }
.row-actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.row-actions button {
  padding: 8px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0a0f1e;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
}
.row-actions button:hover { border-color: var(--accent); color: var(--accent-2); }
.row-actions button:disabled { opacity: 0.5; cursor: not-allowed; }

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 8px;
}
.image-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #0a0f1e;
}
.image-card img {
  width: 100%;
  display: block;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: #050810;
}
.image-card .image-card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  font-size: 12px;
  color: var(--text-dim);
}
.image-card .image-card-actions a { color: var(--accent-2); text-decoration: none; }
.image-placeholder {
  color: var(--text-dim);
  font-size: 13px;
  padding: 40px;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: 10px;
  grid-column: 1 / -1;
}

.modal {
  position: fixed; inset: 0; background: rgba(3,6,14,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 20;
  backdrop-filter: blur(3px);
}
.modal-box {
  background: var(--panel); border: 1px solid var(--border); padding: 28px; border-radius: 14px; width: 320px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-box h2 { margin-top: 0; font-size: 17px; }
.modal-box input {
  width: 100%; padding: 11px 14px; margin-bottom: 12px; border: 1px solid var(--border); border-radius: 8px;
  background: #0a0f1e; color: var(--text);
}
.modal-actions { display: flex; gap: 10px; }
.modal-actions button.secondary { background: #0a0f1e; color: var(--text); border: 1px solid var(--border); }