/* =========================
  Base Theme
  ========================= */
:root {
  --page-font: ui-sans-serif, system-ui, -apple-system, Segoe UI, sans-serif;
  --bg: #f3f7fc;
  --bg-grad: #e7eef9;
  --surface: #ffffff;
  --text: #12203a;
  --muted: #5f6f86;
  --border: #dbe4f0;
  --accent: #1275d1;
  --accent-strong: #0f5faa;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--page-font);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-grad), var(--bg));
  line-height: 1.55;
}

a {
  color: var(--accent);
}

a:hover {
  color: var(--accent-strong);
}

h1,
h2,
h3 {
  margin-top: 0;
  margin-bottom: var(--space-3);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

h2 {
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
}

p {
  margin-top: 0;
}

input,
button {
  font: inherit;
}

input,
button,
textarea,
select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

button {
  background: var(--accent);
  color: #f7fbff;
  font-weight: 600;
}

button:hover {
  background: var(--accent-strong);
}

/* =========================
   Shared Layout
   ========================= */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-3) 3rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.topbar a {
  text-decoration: none;
  font-weight: 700;
}

.primary-nav {
  display: inline-flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.primary-nav a {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  background: #f8fbff;
}

.primary-nav form {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.primary-nav .logout-button {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  background: #f8fbff;
  cursor: pointer;
}

.primary-nav a:hover {
  color: var(--accent-strong);
  border-color: color-mix(in srgb, var(--accent) 28%, var(--border));
  background: #f0f7ff;
}

.primary-nav .logout-button:hover {
  color: var(--accent-strong);
  border-color: color-mix(in srgb, var(--accent) 28%, var(--border));
  background: #f0f7ff;
}

.primary-nav a.is-active {
  background: var(--accent);
  color: #f7fbff;
  border-color: var(--accent);
}

/* =========================
   Shared Components
   ========================= */
.intro {
  color: var(--muted);
  margin-bottom: var(--space-4);
}

.list {
  display: grid;
  gap: 0.9rem;
}

.card,
.section,
.panel,
form,
.empty,
#article-result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.card,
.section,
.panel,
form,
#article-result {
  padding: var(--space-3);
}

.card h2 {
  margin: 0;
  font-size: 1.15rem;
}

.meta {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.empty {
  border-style: dashed;
  padding: var(--space-3);
  color: var(--muted);
}

pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: #edf3fb;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

/* =========================
   Generate Page
   ========================= */
.generate-page .container {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-3) 3rem;
}

.generate-page form {
  display: grid;
  gap: var(--space-2);
}

.generate-page input,
.generate-page button {
  font-size: 1rem;
  padding: 0.65rem var(--space-2);
}

.generate-page button {
  width: fit-content;
  cursor: pointer;
}

.htmx-indicator {
  display: none;
}

.htmx-request .htmx-indicator,
.htmx-indicator.htmx-request {
  display: flex;
}

.loading-indicator {
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  color: var(--muted);
  text-align: center;
}

.loading-indicator p {
  margin: 0;
}

.spinner {
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.generate-page #article-result {
  margin-top: var(--space-4);
}

/* =========================
   Landing Page
   ========================= */
.landing-page .page {
  max-width: 980px;
}

.landing-page .jumbotron {
  background: linear-gradient(120deg, rgba(18, 117, 209, 0.14), rgba(255, 255, 255, 0.92));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
}

.landing-page .jumbotron h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 6vw, 3rem);
  letter-spacing: 0.01em;
}

.landing-page .jumbotron p {
  margin: 0 0 1rem;
  color: var(--muted);
  max-width: 70ch;
  line-height: 1.55;
}

.landing-page .panel {
  margin-top: var(--space-4);
}

.landing-page .login-cta {
  display: inline-block;
  margin-top: var(--space-2);
  background: var(--accent);
  color: #f7fbff;
  text-decoration: none;
  font-weight: 700;
  padding: var(--space-2) var(--space-3);
  border-radius: 999px;
}

/* =========================
   Login Page
   ========================= */
.login-page .page {
  max-width: 540px;
}

.login-page form {
  display: grid;
  gap: var(--space-2);
}

.login-page label {
  font-weight: 600;
}

.login-page input[type="text"],
.login-page input[type="password"] {
  width: 100%;
  padding: 0.65rem var(--space-2);
}

.login-page .remember-me {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 500;
}

.login-page .form-message {
  margin-bottom: var(--space-2);
}

.login-page .form-message.error {
  color: #8d1f1f;
}

.login-page .form-message.success {
  color: #1f6f3f;
}

/* =========================
   Detail Page
   ========================= */
.article-detail-page .meta {
  margin: 0.25rem 0 1rem;
}

.article-detail-page .section {
  margin-top: var(--space-3);
}

.article-detail-page .video-embed {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
}

.generate-page .video-embed {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
}

.article-detail-page .video-frame {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

.generate-page .video-frame {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

/* =========================
   Responsive
   ========================= */
@media (min-width: 768px) {
  .card,
  .section,
  .panel,
  form,
  #article-result {
    padding: 1.2rem;
  }

  .landing-page .jumbotron {
    padding: 3.25rem;
  }
}