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

:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a25;
  --bg-input: #0d0d16;
  --border: #1e1e30;
  --border-focus: #4285F4;
  --text: #e8e8ed;
  --text-secondary: #8b8b9e;
  --text-muted: #5a5a72;
  --accent: #4285F4;
  --accent-hover: #5a9df8;
  --accent-glow: rgba(66,133,244,0.25);
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --gradient-1: linear-gradient(135deg, #4285F4 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-2: linear-gradient(135deg, #4285F4 0%, #10b981 100%);
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 2px 20px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --transition: 0.2s ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* ===== Header ===== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.header .container {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.2rem;
  color: var(--text) !important; text-decoration: none !important; flex-shrink: 0;
}
.logo-icon { font-size: 1.6rem; }
.logo-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav { display: flex; gap: 4px; background: var(--bg-card); border-radius: 12px; padding: 4px; }
.nav-btn {
  padding: 8px 18px; border: none; border-radius: 10px;
  background: transparent; color: var(--text-secondary);
  font-size: 0.875rem; font-weight: 500; cursor: pointer;
  transition: all var(--transition); white-space: nowrap; font-family: inherit;
}
.nav-btn:hover { color: var(--text); }
.nav-btn.active {
  background: var(--accent); color: #fff; box-shadow: 0 2px 12px var(--accent-glow);
}

/* ===== Logout button ===== */
.btn-logout {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 10px;
  background: transparent; border: 1px solid var(--border);
  font-size: 1rem; text-decoration: none !important;
  transition: all var(--transition); color: var(--text-secondary);
}
.btn-logout:hover {
  background: rgba(239,68,68,0.1); border-color: var(--error); color: var(--error);
}

.header-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 6px var(--success);
}
.status-dot.error { background: var(--error); box-shadow: 0 0 6px var(--error); }
.status-dot.loading { background: var(--warning); animation: pulse 1s infinite; }
.status-text { font-size: 0.8rem; color: var(--text-secondary); }

/* ===== Hero ===== */
.hero {
  text-align: center; padding: 80px 0 60px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -180px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 500px;
  background: radial-gradient(ellipse, rgba(66,133,244,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; line-height: 1.25; letter-spacing: -0.02em;
  margin-bottom: 18px; position: relative;
}
.hero h1 span {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.1rem; color: var(--text-secondary);
  max-width: 560px; margin: 0 auto 28px; line-height: 1.6;
}
.hero-tags {
  display: flex; gap: 10px; flex-wrap: wrap; justify-content: center;
}
.hero-tags span {
  padding: 6px 16px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 99px; font-size: 0.8rem; color: var(--text-secondary); font-weight: 500;
}

/* ===== Main ===== */
.main { padding: 0 0 80px; }

/* ===== API Warning Banner ===== */
.api-warning {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 20px 24px; margin-bottom: 24px;
  background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.3);
  border-radius: var(--radius); animation: toastIn 0.3s ease;
}
.api-warning-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.api-warning-text strong { color: var(--warning); display: block; margin-bottom: 6px; }
.api-warning-text p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.6; }
.api-warning-text code {
  background: var(--bg-input); padding: 2px 8px; border-radius: 6px;
  font-size: 0.8rem; color: var(--accent);
}

/* ===== Tabs ===== */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== Card ===== */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow);
}
.card-header { padding: 28px 32px 0; }
.card-header h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
.card-header p { color: var(--text-secondary); font-size: 0.9rem; }
.card-body { padding: 24px 32px 32px; }

/* ===== Form ===== */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; margin-bottom: 8px; font-size: 0.85rem;
  font-weight: 600; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.form-group textarea,
.form-group select,
.form-group input[type="url"] {
  width: 100%; padding: 14px 16px;
  background: var(--bg-input); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 0.95rem; font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical; outline: none;
}
.form-group select {
  appearance: none; cursor: pointer;
  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='%238b8b9e' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 16px center;
  padding-right: 42px;
}
.form-group textarea:focus,
.form-group select:focus,
.form-group input[type="url"]:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(66,133,244,0.15);
}
.form-hint {
  display: block; margin-top: 6px; font-size: 0.75rem;
  color: var(--text-muted); font-weight: 400; text-transform: none; letter-spacing: 0;
}
.form-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px;
}

/* ===== Advanced toggle ===== */
.advanced-toggle {
  margin-bottom: 24px; padding: 14px 18px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.advanced-toggle summary {
  cursor: pointer; font-size: 0.85rem; font-weight: 600;
  color: var(--text-secondary); user-select: none;
  list-style: none;
}
.advanced-toggle summary::-webkit-details-marker { display: none; }
.advanced-toggle summary::after {
  content: '▸'; margin-left: 8px; font-size: 0.7rem; transition: transform var(--transition);
  display: inline-block;
}
.advanced-toggle[open] summary::after { transform: rotate(90deg); }
.advanced-body { margin-top: 16px; }

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; background: var(--accent); color: #fff;
  border: none; border-radius: 99px; font-size: 0.95rem;
  font-weight: 600; cursor: pointer; font-family: inherit;
  transition: all var(--transition);
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px; background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border); border-radius: 99px;
  font-size: 0.85rem; font-weight: 500; cursor: pointer;
  transition: all var(--transition); font-family: inherit;
}
.btn-secondary:hover { border-color: var(--text-muted); color: var(--text); }
.btn-danger { color: var(--error); border-color: rgba(239,68,68,0.3); }
.btn-danger:hover { border-color: var(--error); color: var(--error); background: rgba(239,68,68,0.08); }
.btn-icon { font-size: 1.1rem; }

/* ===== Result Area ===== */
.result-area { margin-top: 24px; }
.result-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px;
}
.result-grid .img-card {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; transition: all var(--transition);
}
.result-grid .img-card:hover {
  border-color: var(--accent); box-shadow: 0 4px 20px var(--accent-glow);
}
.result-grid .img-card img {
  width: 100%; display: block; aspect-ratio: 1; object-fit: cover; cursor: pointer;
}
.result-grid .img-card .img-actions {
  display: flex; gap: 8px; padding: 10px 12px;
}
.result-grid .img-card .img-actions button {
  flex: 1; padding: 6px 12px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg-card); color: var(--text-secondary);
  font-size: 0.75rem; cursor: pointer; transition: all var(--transition); font-family: inherit;
}
.result-grid .img-card .img-actions button:hover {
  border-color: var(--accent); color: var(--accent);
}
.result-meta { margin-top: 16px; font-size: 0.8rem; color: var(--text-muted); }
.result-meta code {
  background: var(--bg-input); padding: 2px 8px; border-radius: 6px;
  font-size: 0.75rem; color: var(--accent);
}

/* ===== Gallery ===== */
.gallery-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px;
}
.gallery-header h2 { font-size: 1.4rem; }
.gallery-count { font-size: 0.85rem; color: var(--text-muted); font-weight: 400; }
.gallery-actions { display: flex; gap: 8px; }
.gallery-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px;
}
.gallery-grid .gallery-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: all var(--transition); cursor: pointer;
}
.gallery-grid .gallery-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-lg); transform: translateY(-2px);
}
.gallery-grid .gallery-card img {
  width: 100%; aspect-ratio: 1; object-fit: cover; display: block;
}
.gallery-grid .gallery-card .gallery-info { padding: 14px 16px; }
.gallery-grid .gallery-card .gallery-prompt {
  font-size: 0.8rem; color: var(--text-secondary);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; line-height: 1.4;
}
.gallery-grid .gallery-card .gallery-meta {
  display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap;
}
.gallery-grid .gallery-card .gallery-badge {
  padding: 3px 10px; border-radius: 99px; font-size: 0.7rem;
  font-weight: 600; background: var(--bg-input); color: var(--text-muted);
  border: 1px solid var(--border);
}
.gallery-empty {
  grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-muted);
}
.gallery-empty .empty-icon { font-size: 3rem; display: block; margin-bottom: 12px; }

/* ===== Loader ===== */
.loader-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,10,15,0.8); backdrop-filter: blur(6px);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px;
}
.loader-overlay p { color: var(--text-secondary); font-size: 0.95rem; }
.loader-spinner {
  width: 48px; height: 48px;
  border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed; inset: 0; z-index: 400;
  background: rgba(0,0,0,0.92); display: flex; align-items: center; justify-content: center;
  flex-direction: column; cursor: zoom-out;
}
.lightbox img {
  max-width: 90vw; max-height: 80vh; object-fit: contain; border-radius: 12px;
}
.lightbox-close {
  position: absolute; top: 24px; right: 32px;
  font-size: 2.5rem; color: #fff; cursor: pointer; line-height: 1;
  transition: opacity var(--transition);
}
.lightbox-close:hover { opacity: 0.7; }
.lightbox-info {
  margin-top: 16px; color: var(--text-secondary); font-size: 0.85rem; text-align: center;
}

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  z-index: 300;
  display: flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: 99px;
  background: var(--bg-card); border: 1px solid var(--border);
  box-shadow: var(--shadow-lg); font-size: 0.9rem;
  animation: toastIn 0.3s ease;
}
.toast.success { border-color: var(--success); }
.toast.success .toast-icon { color: var(--success); }
.toast.error { border-color: var(--error); }
.toast.error .toast-icon { color: var(--error); }
.toast-icon { font-size: 1.1rem; }

/* ===== Footer ===== */
.footer {
  text-align: center; padding: 32px 0;
  border-top: 1px solid var(--border); color: var(--text-muted); font-size: 0.85rem;
}

/* ===== Animations ===== */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(16px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .header .container { flex-wrap: wrap; gap: 12px; }
  .nav { order: 3; width: 100%; justify-content: center; }
  .card-header, .card-body { padding-left: 20px; padding-right: 20px; }
  .hero { padding: 48px 0 40px; }
  .result-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}
@media (max-width: 480px) {
  .nav-btn { padding: 6px 12px; font-size: 0.78rem; }
  .form-row { grid-template-columns: 1fr; }
}

/* ===== Login Page ===== */
.login-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 50% 0%, rgba(66,133,244,0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(139,92,246,0.06) 0%, transparent 50%);
}

.login-container { width: 100%; max-width: 420px; }

.login-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px 36px;
  box-shadow: var(--shadow-lg);
}

.login-header { text-align: center; margin-bottom: 32px; }
.login-logo { font-size: 3rem; display: block; margin-bottom: 12px; }
.login-header h1 {
  font-size: 1.6rem; font-weight: 800; margin-bottom: 8px;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.login-header p {
  font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5;
}

.login-error {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; margin-bottom: 20px;
  background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.3);
  border-radius: var(--radius); font-size: 0.85rem; color: var(--error);
}

.login-form .form-group { margin-bottom: 18px; }
.login-form .form-group label {
  display: block; margin-bottom: 8px; font-size: 0.85rem;
  font-weight: 600; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.login-form .form-group input[type="text"],
.login-form .form-group input[type="password"] {
  width: 100%; padding: 14px 16px;
  background: var(--bg-input); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 0.95rem; font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.login-form .form-group input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(66,133,244,0.15);
}

.login-remember {
  display: flex; align-items: center; margin-bottom: 24px;
}
.login-remember label {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--text-secondary); cursor: pointer;
}
.login-remember input[type="checkbox"] {
  width: 16px; height: 16px; accent-color: var(--accent);
  cursor: pointer;
}

.btn-full { width: 100%; justify-content: center; }