/* ============================================
   DEMO PAGE — Modern SaaS Style
   ============================================ */

:root {
  --demo-hero-gradient: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 40%, #bbf7d0 100%);
  --demo-card-radius: 16px;
}

.demo-body {
  background: #F8FAFC;
  font-family: var(--font-thai);
}

.demo-body .nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.demo-body .mobile-menu {
  top: 72px;
}

.nav-active {
  color: var(--color-primary) !important;
  font-weight: 600;
}

.nav-cta-demo {
  display: none;
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 100px;
  align-items: center;
}

@media (min-width: 768px) {
  .nav-cta-demo {
    display: inline-flex;
  }
}

/* ========== DEMO HERO ========== */
.demo-hero-section {
  background: var(--demo-hero-gradient);
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.demo-hero-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  padding: 48px var(--space-3);
  text-align: center;
}

@media (min-width: 768px) {
  .demo-hero-container {
    min-height: 320px;
    padding: 64px var(--space-5);
  }
}

.demo-hero-content {
  max-width: 640px;
}

.demo-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.demo-hero-badge svg {
  flex-shrink: 0;
}

.demo-hero-title {
  font-family: var(--font-family);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .demo-hero-title {
    font-size: 44px;
  }
}

.demo-hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .demo-hero-subtitle {
    font-size: 18px;
  }
}

/* ========== DEMO MAIN ========== */
.demo-main {
  padding-top: 0;
}

.demo-content-wrapper {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

@media (min-width: 768px) {
  .demo-content-wrapper {
    padding: 0 var(--space-5);
  }
}

/* ========== DEMO TRY SECTION ========== */
.demo-try-section {
  padding: 48px 0;
}

@media (min-width: 768px) {
  .demo-try-section {
    padding: 64px 0;
  }
}

@media (min-width: 1024px) {
  .demo-try-section {
    padding: 80px 0;
  }
}

.demo-try-intro {
  text-align: center;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .demo-try-intro {
    margin-bottom: 48px;
  }
}

/* ========== SECTION HEADING ========== */
.demo-section-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-family);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

@media (min-width: 768px) {
  .demo-section-heading {
    font-size: 28px;
  }
}

.demo-section-heading-centered {
  justify-content: center;
  text-align: center;
}

.demo-section-heading-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  flex-shrink: 0;
}

.demo-section-subtitle {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.demo-section-subtitle-centered {
  text-align: center;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== DEMO STEPS ========== */
.demo-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

@media (min-width: 768px) {
  .demo-steps {
    gap: 24px;
  }
}

.demo-step {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px;
  transition: all 200ms ease;
}

.demo-step:hover {
  border-color: rgba(55, 160, 230, 0.3);
  box-shadow: 0 2px 12px rgba(55, 160, 230, 0.08);
}

.demo-step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 700;
}

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

@media (max-width: 767px) {
  .demo-step-body {
    flex-basis: calc(100% - 52px);
  }
}

.demo-step-screenshot {
  width: 100%;
  margin-top: 8px;
}

.demo-step-screenshot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.demo-step-screenshot--empty {
  display: none;
}

@media (min-width: 768px) {
  .demo-step {
    display: grid;
    grid-template-columns: 36px 1fr;
    column-gap: 16px;
    row-gap: 0;
    align-items: start;
  }

  .demo-step--with-image {
    grid-template-columns: 36px 1fr 1.2fr;
  }

  .demo-step-screenshot {
    margin-top: 0;
  }

  .demo-step--with-image .demo-step-body {
    padding: 28px 24px 28px 0;
  }

  .demo-step--with-image .demo-step-number {
    margin-top: 28px;
  }

  .demo-step-screenshot {
    padding: 24px 24px 24px 0;
  }

  .demo-step-screenshot img {
    border-radius: 16px;
  }
}

.demo-step-title {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
  line-height: 1.4;
}

@media (min-width: 768px) {
  .demo-step-title {
    font-size: 17px;
  }
}

.demo-step-desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.demo-step-desc code {
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 600;
}

.demo-step-desc em {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: 13px;
}

.demo-step-desc strong {
  font-weight: 600;
  color: var(--color-text);
}

.demo-step-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 8px 18px;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 600;
  border-radius: 100px;
  text-decoration: none;
  transition: all 200ms ease;
}

.demo-step-cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}


/* ========== DEMO CTA BUTTON ========== */
.demo-cta-wrapper {
  text-align: center;
  margin-top: 8px;
}

.demo-cta-button {
  margin-top: 8px;
}

/* ========== DEMO BROWSER FRAME ========== */
.demo-browser-frame {
  background: var(--color-white);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.demo-browser-bar {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.demo-browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.demo-browser-dot:nth-child(1) { background: #FF5F57; }
.demo-browser-dot:nth-child(2) { background: #FFBD2E; }
.demo-browser-dot:nth-child(3) { background: #28CA41; }

.demo-browser-url {
  flex: 1;
  background: var(--color-white);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: 12px;
  font-family: var(--font-family);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== DEMO LOGIN MOCKUP ========== */
.demo-login-mockup {
  width: 100%;
  max-width: 320px;
  text-align: center;
}

.demo-mockup-logo {
  margin-bottom: 12px;
  color: var(--color-primary);
}

.demo-mockup-title {
  font-family: var(--font-family);
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
}

.demo-mockup-subtitle {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.demo-mockup-field {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.demo-mockup-field svg {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.demo-mockup-field span {
  color: var(--color-text-secondary);
}

.demo-mockup-button {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px;
  border-radius: 10px;
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 700;
  margin-top: 8px;
}

/* ========== DEMO SCREENSHOTS ========== */
.demo-screenshots-section {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .demo-screenshots-section {
    padding: 64px 0;
  }
}

@media (min-width: 1024px) {
  .demo-screenshots-section {
    padding: 80px 0;
  }
}

.demo-screenshots-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 0;
}

@media (min-width: 768px) {
  .demo-screenshots-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .demo-screenshots-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

.demo-screenshot-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--demo-card-radius);
  overflow: hidden;
  text-decoration: none;
  transition: all 250ms ease;
  position: relative;
}

.demo-screenshot-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 250ms ease;
}

.demo-screenshot-card:hover {
  border-color: rgba(55, 160, 230, 0.3);
  box-shadow: 0 4px 16px rgba(55, 160, 230, 0.1), 0 2px 4px rgba(0,0,0,0.04);
  transform: translateY(-2px);
}

.demo-screenshot-card:hover::after {
  transform: scaleX(1);
}

.demo-screenshot-preview {
  overflow: hidden;
  background: var(--color-bg-alt);
}

.demo-screenshot-preview img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 300ms ease;
}

.demo-screenshot-card:hover .demo-screenshot-preview img {
  transform: scale(1.02);
}

.demo-screenshot-info {
  padding: 20px;
}

.demo-screenshot-title {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.4;
}

@media (min-width: 768px) {
  .demo-screenshot-title {
    font-size: 17px;
  }
}

.demo-screenshot-desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.demo-screenshot-link {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap 200ms ease;
}

.demo-screenshot-card:hover .demo-screenshot-link {
  gap: 8px;
}

/* ========== DEMO CTA SECTION ========== */
.demo-cta-section {
  padding: 48px 0 64px;
}

@media (min-width: 768px) {
  .demo-cta-section {
    padding: 64px 0 80px;
  }
}

.demo-cta-card {
  background: linear-gradient(135deg, #37a0e6 0%, #2a88c8 100%);
  border-radius: 24px;
  padding: 48px 32px;
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .demo-cta-card {
    padding: 64px 48px;
  }
}

.demo-cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}

.demo-cta-card::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  pointer-events: none;
}

.demo-cta-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
}

.demo-cta-icon svg {
  color: var(--color-white);
}

.demo-cta-title {
  font-family: var(--font-family);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .demo-cta-title {
    font-size: 32px;
  }
}

.demo-cta-desc {
  font-size: 16px;
  line-height: 1.6;
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.demo-cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .demo-cta-buttons {
    flex-direction: row;
    gap: 16px;
  }
}

.demo-cta-buttons .btn-white {
  background: var(--color-white);
  color: var(--color-primary);
}

.demo-cta-buttons .btn-white:hover {
  background: rgba(255,255,255,0.9);
}

.demo-cta-buttons .btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.4);
}

.demo-cta-buttons .btn-secondary:hover {
  border-color: var(--color-white);
  color: var(--color-white);
}

/* ========== DEMO LIGHTBOX ========== */
.demo-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.85);
  cursor: zoom-out;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.demo-lightbox.active {
  display: flex;
}

.demo-lightbox img {
  max-width: 100%;
  max-height: 90vh;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  cursor: default;
}

.demo-lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  font-size: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 200ms ease;
  line-height: 1;
  font-family: var(--font-family);
}

.demo-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.demo-screenshot-card {
  cursor: pointer;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 767px) {
  .demo-hero-title {
    font-size: 28px;
  }

  .demo-hero-subtitle {
    font-size: 15px;
  }

  .demo-screenshots-grid {
    grid-template-columns: 1fr;
  }

  .demo-cta-card {
    padding: 40px 24px;
  }
}