:root {
  --sf-bg: #0b0d12;
  --sf-bg-alt: #12151d;
  --sf-surface: #181c27;
  --sf-border: #2a3040;
  --sf-text: #e8ecf4;
  --sf-muted: #9aa3b5;
  --sf-accent: #6c8cff;
  --sf-accent-2: #9b7bff;
  --sf-ok: #3dd68c;
  --sf-err: #ff6b6b;
  --sf-radius: 14px;
  --sf-font: "DM Sans", system-ui, sans-serif;
  --sf-display: "Outfit", "DM Sans", sans-serif;
}

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

body.sf-page {
  margin: 0;
  font-family: var(--sf-font);
  background: var(--sf-bg);
  color: var(--sf-text);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.sf-container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.sf-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(11, 13, 18, 0.85);
  border-bottom: 1px solid var(--sf-border);
}

.sf-header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
}

.sf-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--sf-text);
  text-decoration: none;
  font-family: var(--sf-display);
  font-weight: 700;
}

.sf-logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--sf-accent), var(--sf-accent-2));
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.sf-logo-text {
  white-space: nowrap;
}

.sf-nav {
  display: flex;
  gap: 1.25rem;
  margin-left: 1.5rem;
}

.sf-nav a {
  color: var(--sf-muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.sf-nav a:hover {
  color: var(--sf-text);
}

.sf-header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.sf-lang-select {
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  color: var(--sf-muted);
  border-radius: 8px;
  padding: 0.35rem 0.5rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
}

.sf-lang-btn {
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  color: var(--sf-muted);
  border-radius: 8px;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
}

.sf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 10px;
  padding: 0.65rem 1.1rem;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}

.sf-btn-primary {
  background: linear-gradient(135deg, var(--sf-accent), var(--sf-accent-2));
  color: #fff;
}

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

.sf-btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
}

.sf-btn-block {
  width: 100%;
}

.sf-hero {
  padding: 4rem 0 3rem;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(108, 140, 255, 0.18), transparent),
    var(--sf-bg);
}

.sf-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}

.sf-eyebrow {
  color: var(--sf-accent);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
}

.sf-hero h1 {
  font-family: var(--sf-display);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1rem;
}

.sf-hero-lead {
  color: var(--sf-muted);
  font-size: 1.05rem;
  max-width: 34rem;
  margin: 0 0 1.5rem;
}

.sf-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.sf-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.sf-chip {
  font-size: 0.78rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  color: var(--sf-muted);
}

.sf-chip strong {
  color: var(--sf-accent);
}

.sf-hero-visual {
  display: flex;
  justify-content: center;
}

.sf-phone {
  width: min(200px, 42vw);
  aspect-ratio: 9 / 16;
  border-radius: 24px;
  border: 2px solid var(--sf-border);
  background: #000;
  overflow: hidden;
  position: relative;
  box-shadow: 0 24px 60px rgba(108, 140, 255, 0.2);
}

.sf-phone-notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 14px;
  background: #000;
  border-radius: 0 0 10px 10px;
  z-index: 2;
}

.sf-phone-screen {
  width: 100%;
  height: 100%;
  position: relative;
  background: linear-gradient(160deg, #2a3360, #111);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 10px 18px;
}

.sf-phone-scene {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  opacity: 0;
  transition: opacity 0.5s;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.35);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sf-phone-scene.active {
  opacity: 1;
}

.sf-phone-caption {
  position: relative;
  z-index: 1;
  background: rgba(0, 0, 0, 0.75);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  text-align: center;
}

.sf-section {
  padding: 3.5rem 0;
}

.sf-section-alt {
  background: var(--sf-bg-alt);
}

.sf-section h2 {
  font-family: var(--sf-display);
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
}

.sf-section-lead {
  color: var(--sf-muted);
  margin: 0 0 2rem;
}

.sf-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.sf-feature-card {
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius);
  padding: 1.25rem 1.35rem;
}

.sf-feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.sf-feature-card p {
  margin: 0;
  color: var(--sf-muted);
  font-size: 0.92rem;
}

.sf-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.sf-plan-card {
  position: relative;
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius);
  padding: 1.5rem;
}

.sf-plan-featured {
  border-color: var(--sf-accent);
  box-shadow: 0 0 0 1px rgba(108, 140, 255, 0.35);
}

.sf-plan-badge {
  position: absolute;
  top: -10px;
  right: 14px;
  background: var(--sf-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.sf-plan-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--sf-display);
}

.sf-plan-price {
  margin: 0 0 0.35rem;
}

.sf-plan-amount {
  font-size: 2rem;
  font-weight: 700;
}

.sf-plan-period {
  color: var(--sf-muted);
  font-size: 0.9rem;
}

.sf-plan-quota {
  color: var(--sf-muted);
  margin: 0 0 1rem;
  font-size: 0.92rem;
}

.sf-pricing-note {
  margin-top: 1rem;
  color: var(--sf-muted);
  font-size: 0.9rem;
  text-align: center;
}

.sf-studio-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.sf-sub-status {
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  font-size: 0.85rem;
  color: var(--sf-muted);
}

.sf-sub-active {
  border-color: rgba(61, 214, 140, 0.4);
  color: var(--sf-ok);
}

.sf-sub-plan {
  font-weight: 700;
  margin-right: 0.5rem;
}

.sf-studio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.sf-panel {
  background: var(--sf-surface);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius);
  padding: 1.35rem 1.5rem;
}

.sf-panel h3 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

.sf-form label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--sf-muted);
  margin-bottom: 0.35rem;
}

.sf-input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--sf-border);
  background: var(--sf-bg);
  color: var(--sf-text);
  font-family: inherit;
  font-size: 0.92rem;
  margin-bottom: 0.85rem;
}

.sf-textarea {
  min-height: 88px;
  resize: vertical;
}

.sf-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.sf-results-empty {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--sf-muted);
  font-size: 0.92rem;
}

.sf-results-panel {
  display: none;
}

.sf-results-panel.visible {
  display: block;
}

.sf-status {
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.sf-status.ok {
  background: rgba(61, 214, 140, 0.12);
  color: var(--sf-ok);
  border-left: 3px solid var(--sf-ok);
}

.sf-status.err {
  background: rgba(255, 107, 107, 0.12);
  color: var(--sf-err);
  border-left: 3px solid var(--sf-err);
}

.sf-pipeline-steps {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.sf-pipeline-step {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
  color: var(--sf-muted, #8b8b9e);
}

.sf-pipeline-step.is-active {
  border-color: rgba(124, 92, 255, 0.55);
  background: rgba(124, 92, 255, 0.1);
  color: var(--sf-text, #f4f4f8);
}

.sf-pipeline-step.is-done {
  border-color: rgba(61, 214, 140, 0.35);
  color: var(--sf-ok, #3dd68c);
}

.sf-pipeline-step.is-error {
  border-color: rgba(255, 107, 107, 0.45);
  color: var(--sf-err, #ff6b6b);
}

.sf-pipeline-step-num {
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
}

.sf-pipeline-step.is-active .sf-pipeline-step-num {
  background: rgba(124, 92, 255, 0.35);
}

.sf-pipeline-step.is-done .sf-pipeline-step-num {
  background: rgba(61, 214, 140, 0.25);
}

.sf-pipeline-step-body {
  flex: 1;
  min-width: 0;
}

.sf-pipeline-step-label {
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.sf-pipeline-step-msg {
  font-size: 0.78rem;
  opacity: 0.9;
  word-break: keep-all;
}

.sf-pipeline-step-result {
  margin-top: 0.55rem;
  padding-top: 0.55rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

.sf-pipeline-step-result[hidden] {
  display: none !important;
}

.sf-step-scenes {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.sf-scene-card-compact {
  padding: 0.55rem 0.65rem;
  font-size: 0.8rem;
}

.sf-step-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 0.45rem;
}

.sf-step-image-card {
  border-radius: 8px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sf-step-image-card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  display: block;
}

.sf-step-image-placeholder {
  aspect-ratio: 9 / 16;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: var(--sf-muted);
  background: rgba(124, 92, 255, 0.12);
}

.sf-step-image-caption {
  margin: 0;
  padding: 0.3rem 0.35rem;
  font-size: 0.68rem;
  line-height: 1.3;
  color: var(--sf-text);
}

.sf-step-bgm {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  font-size: 0.8rem;
}

.sf-step-bgm.has-bgm {
  background: rgba(61, 214, 140, 0.1);
  border: 1px solid rgba(61, 214, 140, 0.25);
}

.sf-step-bgm.no-bgm {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sf-step-video {
  width: 100%;
  max-width: 220px;
  border-radius: 10px;
  display: block;
  margin: 0 auto;
}

.sf-step-save-msg {
  margin: 0 0 0.45rem;
  font-size: 0.8rem;
}

.sf-step-save-btn {
  width: 100%;
}

.sf-final-video {
  margin-bottom: 1rem;
}

.sf-final-player {
  width: 100%;
  max-width: 280px;
  border-radius: 12px;
  display: block;
  margin: 0.5rem auto;
}

.sf-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.sf-meta span {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  background: var(--sf-bg);
  border: 1px solid var(--sf-border);
  color: var(--sf-muted);
}

.sf-scene-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.sf-scene-card {
  background: var(--sf-bg);
  border: 1px solid var(--sf-border);
  border-left: 3px solid var(--sf-accent);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}

.sf-scene-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.sf-scene-num {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--sf-accent);
  text-transform: uppercase;
}

.sf-scene-badge {
  font-size: 0.72rem;
  color: var(--sf-ok);
}

.sf-scene-caption {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 0.25rem;
}

.sf-scene-narration {
  font-size: 0.85rem;
  color: var(--sf-muted);
}

.sf-footer {
  border-top: 1px solid var(--sf-border);
  padding: 2rem 0;
  margin-top: 2rem;
}

.sf-footer-inner {
  text-align: center;
  color: var(--sf-muted);
  font-size: 0.85rem;
}

.sf-footer-note {
  margin-top: 0.35rem;
  font-size: 0.78rem;
}

.sf-footer-privacy {
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: var(--sf-muted);
  opacity: 0.85;
}

.sf-admin-banner {
  margin: 0.5rem 0 0;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.82rem;
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.35);
  color: #ffc107;
}

.sf-admin-banner a { color: #ffd54f; }

.sf-service-alert {
  background: rgba(255, 107, 107, 0.12);
  border-bottom: 1px solid rgba(255, 107, 107, 0.35);
  padding: 0.65rem 0;
}

.sf-service-alert-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  font-size: 0.88rem;
  color: #ffb4b4;
}

.sf-service-alert-inner strong {
  color: var(--sf-err);
  font-weight: 700;
}

.sf-pricing-warn {
  color: #ffc107 !important;
}

.sf-studio-lock {
  margin: 0 0 1rem;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.85rem;
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid rgba(255, 107, 107, 0.3);
  color: #ffb4b4;
}

.sf-form-disabled input,
.sf-form-disabled textarea,
.sf-form-disabled select {
  opacity: 0.55;
  pointer-events: none;
}

.sf-api-row {
  position: relative;
}

.sf-api-row .sf-input {
  padding-right: 3.5rem;
}

.sf-toggle-key {
  position: absolute;
  right: 10px;
  top: 10px;
  background: none;
  border: none;
  color: var(--sf-accent);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}

.sf-field-note {
  font-size: 0.78rem;
  color: var(--sf-muted);
  line-height: 1.5;
  margin: -0.35rem 0 0.85rem;
}

.sf-concept-block {
  margin-bottom: 0.25rem;
}

.sf-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
}

.sf-label-inline {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  font-weight: 600;
}

.sf-label-badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--sf-accent);
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.35);
}

.sf-concept-hint {
  margin: 0 0 0.65rem;
}

.sf-concept-example-wrap {
  margin-top: 0.75rem;
}

.sf-concept-example-label {
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--sf-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sf-concept-example {
  margin: 0;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: var(--sf-bg);
  border: 1px solid var(--sf-border);
  color: var(--sf-muted);
  font-size: 0.82rem;
  line-height: 1.6;
  white-space: pre-wrap;
  font-family: inherit;
}

.sf-key-guide {
  margin: 0 0 1rem;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  background: var(--sf-bg);
  border: 1px solid var(--sf-border);
  font-size: 0.85rem;
}

.sf-key-guide summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--sf-accent);
}

.sf-key-steps {
  margin: 0.65rem 0 0.5rem;
  padding-left: 1.2rem;
  color: var(--sf-muted);
  line-height: 1.55;
}

.sf-key-steps li {
  margin-bottom: 0.35rem;
}

.sf-loading {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(11, 13, 18, 0.88);
  place-items: center;
}

.sf-loading.visible {
  display: grid;
}

.sf-loading-box {
  text-align: center;
  background: var(--sf-surface);
  padding: 2rem 2.5rem;
  border-radius: var(--sf-radius);
  border: 1px solid var(--sf-border);
}

.sf-spinner {
  width: 42px;
  height: 42px;
  border: 3px solid var(--sf-border);
  border-top-color: var(--sf-accent);
  border-radius: 50%;
  animation: sf-spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

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

.sf-loading-step {
  font-size: 0.85rem;
  color: var(--sf-accent);
  font-weight: 600;
  margin-top: 0.35rem;
}

@media (max-width: 900px) {
  .sf-hero-grid,
  .sf-feature-grid,
  .sf-pricing-grid,
  .sf-studio-grid {
    grid-template-columns: 1fr;
  }

  .sf-nav {
    display: none;
  }

  .sf-form-row {
    grid-template-columns: 1fr;
  }
}