/* ===========================================================
   Image Generator AI — design system
   =========================================================== */

:root {
  --bg: #f7f7fb;
  --bg-elevated: #ffffff;
  --bg-soft: #eef0fb;
  --text: #15151f;
  --text-muted: #62627a;
  --border: #e4e4f0;
  --accent: #6d5bff;
  --accent-2: #ff5b9e;
  --accent-grad: linear-gradient(135deg, #6d5bff 0%, #ff5b9e 100%);
  --danger: #e5484d;
  --success: #22a06b;
  --shadow: 0 10px 30px -12px rgba(20, 20, 30, 0.18);
  --shadow-sm: 0 2px 10px -4px rgba(20, 20, 30, 0.12);
  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 10px;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Sora", var(--font-body);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0b12;
    --bg-elevated: #15151f;
    --bg-soft: #1b1b29;
    --text: #f1f1f7;
    --text-muted: #9d9db3;
    --border: #29293d;
    --shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.55);
    --shadow-sm: 0 2px 10px -4px rgba(0, 0, 0, 0.45);
  }
}

:root[data-theme="dark"] {
  --bg: #0b0b12;
  --bg-elevated: #15151f;
  --bg-soft: #1b1b29;
  --text: #f1f1f7;
  --text-muted: #9d9db3;
  --border: #29293d;
  --shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.55);
  --shadow-sm: 0 2px 10px -4px rgba(0, 0, 0, 0.45);
}

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

html {
  color-scheme: light dark;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  transition: background 0.2s ease, color 0.2s ease;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Navbar ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
  fill: white;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 15px;
  padding: 8px 14px;
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--bg-soft);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
  font-size: 17px;
}

.icon-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  border: none;
  background: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 2px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 999px;
  padding: 12px 22px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent-grad);
  color: white;
  box-shadow: 0 8px 20px -8px rgba(109, 91, 255, 0.6);
}

.btn-primary:hover {
  box-shadow: 0 10px 26px -6px rgba(109, 91, 255, 0.75);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

/* ---------- Hero ---------- */

.hero {
  padding: 64px 0 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 420px;
  background: var(--accent-grad);
  opacity: 0.16;
  filter: blur(80px);
  z-index: -1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.hero h1 span {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 34px;
}

/* ---------- Tabs ---------- */

.tabs {
  display: inline-flex;
  gap: 4px;
  background: var(--bg-soft);
  padding: 5px;
  border-radius: 999px;
  margin-bottom: 28px;
}

.tab {
  border: none;
  background: none;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-muted);
  transition: background 0.15s ease, color 0.15s ease;
}

.tab.active {
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.panel {
  max-width: 680px;
  margin: 0 auto;
}

.panel.hidden {
  display: none;
}

/* ---------- Prompt / search forms ---------- */

.prompt-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.input-row {
  display: flex;
  gap: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 6px;
  box-shadow: var(--shadow-sm);
}

.input-row input[type="text"] {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  padding: 12px 16px;
  font-size: 16px;
}

.input-row .btn {
  flex-shrink: 0;
}

.options-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.select {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 14px;
  cursor: pointer;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}

.chip {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Results grid ---------- */

.results-section {
  padding: 40px 0 80px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 18px;
}

.section-heading h2 {
  font-family: var(--font-display);
  font-size: 20px;
}

.section-heading .muted {
  color: var(--text-muted);
  font-size: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  aspect-ratio: 4 / 5;
}

.card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.card:hover img {
  transform: scale(1.05);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.72) 0%, rgba(0, 0, 0, 0) 45%);
  opacity: 0;
  transition: opacity 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  gap: 8px;
}

.card:hover .card-overlay,
.card:focus-within .card-overlay {
  opacity: 1;
}

.card-credit {
  color: rgba(255, 255, 255, 0.85);
  font-size: 12px;
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-actions {
  display: flex;
  gap: 6px;
}

.card-actions button,
.card-actions a {
  flex: 1;
  border: none;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(6px);
  color: white;
  border-radius: var(--radius-sm);
  padding: 8px 0;
  font-size: 14px;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease;
}

.card-actions button:hover,
.card-actions a:hover {
  background: rgba(255, 255, 255, 0.3);
}

.card-actions button.saved {
  background: var(--accent-grad);
}

.card.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-soft);
}

.spinner {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

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

.skeleton {
  background: linear-gradient(100deg, var(--bg-soft) 30%, var(--border) 50%, var(--bg-soft) 70%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease infinite;
}

@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .big-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.status-msg {
  text-align: center;
  color: var(--text-muted);
  padding: 20px;
  font-size: 14px;
}

.status-msg.error {
  color: var(--danger);
}

/* ---------- Generic content pages (about/contact) ---------- */

.page-hero {
  padding: 56px 0 24px;
  text-align: center;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

.content-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 36px;
  max-width: 760px;
  margin: 0 auto 60px;
}

.content-card h2 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 28px 0 12px;
}

.content-card h2:first-child {
  margin-top: 0;
}

.content-card p {
  color: var(--text-muted);
  margin-bottom: 4px;
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.feature-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: left;
}

.feature-card .icon {
  font-size: 22px;
  margin-bottom: 8px;
}

.feature-card h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.feature-card p {
  font-size: 13px;
  margin: 0;
}

.form-group {
  margin-bottom: 18px;
  text-align: left;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
}

.form-group textarea {
  resize: vertical;
}

/* ---------- Toasts ---------- */

#toast-container {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 14px;
  animation: toast-in 0.2s ease;
}

.toast.error {
  color: var(--danger);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

.site-footer a {
  text-decoration: none;
  color: var(--text-muted);
}

.site-footer a:hover {
  color: var(--accent);
}

.footer-links {
  display: flex;
  gap: 18px;
  justify-content: center;
  margin-bottom: 10px;
}

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 20px 16px;
    display: none;
    gap: 2px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 14px;
  }

  .nav-toggle {
    display: block;
  }

  .options-row {
    flex-direction: column;
    align-items: stretch;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
  }

  .hero {
    padding: 40px 0 24px;
  }

  .wrap {
    padding: 0 16px;
  }

  .content-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .input-row {
    flex-direction: column;
    align-items: stretch;
  }

  .input-row input[type="text"] {
    padding: 10px 12px;
  }

  .input-row .btn {
    width: 100%;
  }
}