/* -------------------------------------------------------------
 * AK Web Solutions - Premium SaaS Landing Page Stylesheet
 * ------------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- Design Tokens & Global Variables --- */
:root {
  /* Colors - HSL values for easy opacity manipulation */
  --primary-h: 224;
  --primary-s: 64%;
  --primary-l: 33%;
  --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l)); /* Trust Blue */
  
  --secondary-h: 189;
  --secondary-s: 94%;
  --secondary-l: 43%;
  --secondary: hsl(var(--secondary-h), var(--secondary-s), var(--secondary-l)); /* Cyan */
  
  --accent-h: 162;
  --accent-s: 76%;
  --accent-l: 41%;
  --accent: hsl(var(--accent-h), var(--accent-s), var(--accent-l)); /* Emerald Green */
  
  /* Neutral Palette - Light Theme */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #475569;
  --border: #e2e8f0;
  
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(226, 232, 240, 0.8);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
  
  /* Fonts */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-xxl: 6rem;
  
  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-full: 9999px;
  
  /* Effects */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Special gradients */
  --grad-hero: radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.08) 0%, rgba(30, 58, 138, 0.03) 90%);
}

/* --- Dark Theme Variables --- */
[data-theme="dark"] {
  --bg-main: #0b0f19;
  --bg-surface: #131b2e;
  --bg-surface-alt: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: #334155;
  
  --glass-bg: rgba(19, 27, 46, 0.8);
  --glass-border: rgba(51, 65, 85, 0.6);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  
  --grad-hero: radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.15) 0%, rgba(30, 58, 138, 0.1) 90%);
}

/* --- Base Reset & Scroll --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

ul {
  list-style: none;
}

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

/* --- Common UI Components & Utilities --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-padding {
  padding: var(--space-xxl) 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: var(--space-xl) 0;
  }
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto var(--space-xl) auto;
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--text-main) 60%, hsl(var(--primary-h), var(--primary-s), 50%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.125rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background-color: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
  margin-bottom: var(--space-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(30, 58, 138, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(30, 58, 138, 0.4);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-alt);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, #059669 100%);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(16, 185, 129, 0.4);
}

/* Reveal Animation States */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link:hover {
  color: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-surface-alt);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

/* Mobile Menu Button */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 992px) {
  .nav-menu {
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: var(--space-md) 0;
    gap: 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    pointer-events: none;
    z-index: 99;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .mobile-nav-toggle {
    display: block;
  }
}

/* --- Hero Section --- */
.hero {
  position: relative;
  padding-top: 160px;
  padding-bottom: var(--space-xxl);
  background: var(--grad-hero);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: var(--space-xl);
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-lg);
  }
}

.hero-content {
  z-index: 5;
}

.hero-content h1 {
  font-size: 3.5rem;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
  color: var(--text-main);
  line-height: 1.15;
}

@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  max-width: 540px;
}

@media (max-width: 992px) {
  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-ctas {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

@media (max-width: 992px) {
  .hero-ctas {
    justify-content: center;
  }
}

/* System Architecture Diagram */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.system-architecture-container {
  position: relative;
  width: 100%;
  max-width: 440px;
  height: 340px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0.2deg); }
  50% { transform: translateY(-8px) rotate(-0.2deg); }
}

.arch-node {
  position: absolute;
  background-color: var(--bg-surface-alt);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.65rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 0.65rem;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  z-index: 10;
  transition: all var(--transition-normal);
  color: var(--text-main);
  text-align: center;
  width: 100px;
}

.arch-node svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
  transition: color var(--transition-fast);
}

[data-theme="dark"] .arch-node svg {
  color: var(--secondary);
}

.arch-node span {
  font-size: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* Specific Node Positioning */
.arch-core {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--bg-surface);
  border-color: var(--primary);
  width: 110px;
  padding: 0.75rem;
  box-shadow: 0 0 20px rgba(30, 58, 138, 0.12);
}

[data-theme="dark"] .arch-core {
  border-color: var(--secondary);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

.core-pulse {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  border-radius: var(--radius-md);
  border: 2px solid var(--primary);
  animation: corePulse 2.5s infinite;
  opacity: 0;
  pointer-events: none;
}
[data-theme="dark"] .core-pulse {
  border-color: var(--secondary);
}

@keyframes corePulse {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.15); opacity: 0; }
}

.arch-kiosk { top: 40px; left: 40px; }
.arch-websites { top: 40px; right: 40px; }
.arch-terminal { bottom: 40px; left: 40px; }
.arch-inventory { bottom: 40px; right: 40px; }

.arch-node:hover {
  transform: scale(1.05);
  border-color: var(--secondary);
  box-shadow: var(--shadow-lg);
}

.hero-glow-1 {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  z-index: 1;
  filter: blur(40px);
  pointer-events: none;
}

/* --- Services Section --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.service-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.service-card:hover::after {
  opacity: 1;
}

.service-icon-wrapper {
  width: 52px;
  height: 52px;
  background-color: rgba(30, 58, 138, 0.06);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

[data-theme="dark"] .service-icon-wrapper {
  background-color: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
}

.service-icon-wrapper svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
}

[data-theme="dark"] .service-link {
  color: var(--secondary);
}

.service-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.service-card:hover .service-link svg {
  transform: translateX(4px);
}

/* --- Why Choose Us Section --- */
.why-grid {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.why-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  text-align: left;
}

.why-feature-item {
  display: flex;
  gap: var(--space-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.why-feature-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.why-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background-color: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.why-icon svg {
  width: 20px;
  height: 20px;
}

.why-text h4 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.why-text p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* --- How It Works Section --- */
.steps-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  position: relative;
}

@media (max-width: 768px) {
  .steps-container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.step-item {
  text-align: center;
  position: relative;
  z-index: 2;
}

.step-num {
  width: 60px;
  height: 60px;
  background-color: var(--bg-surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md) auto;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

[data-theme="dark"] .step-num {
  color: var(--secondary);
}

.step-item:hover .step-num {
  border-color: var(--secondary);
  color: white;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  transform: scale(1.1);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

.step-item h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.step-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 280px;
  margin: 0 auto;
}

.steps-line {
  position: absolute;
  top: 30px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(to right, var(--border) 0%, var(--border) 100%);
  z-index: 1;
}

@media (max-width: 768px) {
  .steps-line {
    display: none;
  }
}

/* --- Interactive Systems Portfolio Section --- */
.portfolio-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.tab-btn {
  background-color: var(--bg-surface-alt);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn.active {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.portfolio-display {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  min-height: 480px;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.portfolio-display-header {
  height: 48px;
  background-color: var(--bg-surface-alt);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
}

.header-dots {
  display: flex;
  gap: 6px;
}

.header-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
}
.header-dot:nth-child(1) { background-color: #ef4444; }
.header-dot:nth-child(2) { background-color: #f59e0b; }
.header-dot:nth-child(3) { background-color: #10b981; }

.header-title-bar {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  background-color: var(--bg-surface);
  padding: 0.2rem 2.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.portfolio-display-body {
  padding: var(--space-lg);
  flex-grow: 1;
}

/* Demo Content Frames */
.demo-frame {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.demo-frame.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Clinic POS Demo Structure --- */
.clinic-demo-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .clinic-demo-grid {
    grid-template-columns: 1fr;
  }
}

.clinic-sidebar {
  border-right: 1px solid var(--border);
  padding-right: var(--space-md);
}

@media (max-width: 768px) {
  .clinic-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-right: 0;
    padding-bottom: var(--space-md);
  }
}

.clinic-sidebar h4 {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.patient-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.patient-item {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.65rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.patient-item:hover, .patient-item.active {
  border-color: var(--primary);
  background-color: rgba(30, 58, 138, 0.04);
}

.patient-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.patient-status {
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
}
.patient-status.waiting {
  background-color: #fef3c7;
  color: #d97706;
}
.patient-status.billing {
  background-color: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
}

.clinic-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.clinic-profile {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.clinic-profile-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-xs);
}

.patient-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.patient-detail-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.patient-detail-val {
  font-size: 0.9rem;
  font-weight: 500;
}

.clinic-billing {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.billing-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: var(--space-sm);
}

.billing-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.billing-row.total {
  font-weight: 700;
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
  font-size: 1rem;
}

.action-row {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-xs);
}

/* --- Inventory Demo Structure --- */
.inventory-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.inventory-search {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  min-width: 250px;
}

.inventory-search input {
  background: none;
  border: none;
  color: var(--text-main);
  width: 100%;
}

.inventory-table-container {
  overflow-x: auto;
}

.inventory-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.inventory-table th, .inventory-table td {
  padding: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.inventory-table th {
  background-color: var(--bg-surface-alt);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
}

.inventory-table td {
  font-size: 0.9rem;
}

.stock-pill {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}
.stock-pill.in-stock {
  background-color: #d1fae5;
  color: #065f46;
}
.stock-pill.low-stock {
  background-color: #fee2e2;
  color: #991b1b;
}

/* --- Sales Analytics Demo Structure --- */
.analytics-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-lg);
}

@media (max-width: 768px) {
  .analytics-grid {
    grid-template-columns: 1fr;
  }
}

.chart-container {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  background-color: var(--bg-surface-alt);
  min-height: 250px;
  display: flex;
  flex-direction: column;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.chart-header h4 {
  font-size: 0.95rem;
}

.chart-tabs {
  display: flex;
  background-color: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  padding: 2px;
}

.chart-tab {
  background: none;
  border: none;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 4px;
}

.chart-tab.active {
  background-color: var(--primary);
  color: white;
}

.chart-canvas {
  flex-grow: 1;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  height: 180px;
}

.chart-bar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-grow: 1;
}

.chart-bar-wrapper {
  height: 140px;
  width: 24px;
  background-color: var(--bg-surface);
  border-radius: var(--radius-full);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  position: relative;
}

.chart-bar {
  width: 100%;
  background: linear-gradient(to top, var(--primary), var(--secondary));
  transition: height var(--transition-slow) ease;
  height: 0%;
  border-radius: var(--radius-full);
}

.chart-bar-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.analytics-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.stat-box {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.stat-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  margin-top: 0.25rem;
}

.stat-trend {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}
.stat-trend.up { color: var(--accent); }

/* --- Contact Section --- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-xl);
}

@media (max-width: 992px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-item {
  display: flex;
  gap: var(--space-sm);
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  background-color: rgba(30, 58, 138, 0.05);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

[data-theme="dark"] .contact-item-icon {
  background-color: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
}

.contact-item-icon svg {
  width: 22px;
  height: 22px;
}

.contact-item-text h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.contact-item-text p {
  color: var(--text-muted);
}

/* Contact Form */
.contact-form-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

@media (max-width: 576px) {
  .contact-form-card {
    padding: var(--space-md);
  }
}

.form-group-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

@media (max-width: 576px) {
  .form-group-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-control {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--text-main);
  transition: all var(--transition-fast);
  width: 100%;
}

.form-control:focus {
  border-color: var(--primary);
  background-color: var(--bg-surface);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Form validation styling */
.form-control.is-invalid {
  border-color: #ef4444;
  background-color: rgba(239, 68, 68, 0.03);
}

.form-control.is-valid {
  border-color: var(--accent);
  background-color: rgba(16, 185, 129, 0.03);
}

.invalid-feedback {
  color: #ef4444;
  font-size: 0.75rem;
  display: none;
  font-weight: 500;
}

.form-control.is-invalid ~ .invalid-feedback {
  display: block;
}

/* --- Footer --- */
.footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: var(--space-xl) 0 var(--space-md) 0;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 0.8fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 320px;
}

.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.social-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: rgba(30, 58, 138, 0.03);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-link:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Subtle login link */
.admin-login-trigger {
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.admin-login-trigger:hover {
  opacity: 1;
  text-decoration: underline;
}

/* --- Modals / Overlays --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 440px;
  padding: var(--space-xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
  transition-delay: 0.05s;
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
}

.modal-close-btn:hover {
  background-color: var(--bg-surface-alt);
}

.modal-close-btn svg {
  width: 20px;
  height: 20px;
}

.modal-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  text-align: center;
}

.modal-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
  text-align: center;
}

.modal-alert {
  padding: 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
  display: none;
}
.modal-alert.error {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}
.modal-alert.success {
  background-color: rgba(16, 185, 129, 0.1);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Success Modal Style */
.success-checkmark {
  width: 72px;
  height: 72px;
  background-color: rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin: 0 auto var(--space-md) auto;
}

.success-checkmark svg {
  width: 36px;
  height: 36px;
}

/* --- Admin Control Panel (Sidebar Drawer) --- */
.admin-drawer {
  position: fixed;
  top: 0;
  right: -480px;
  width: 480px;
  height: 100vh;
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  z-index: 1500;
  display: flex;
  flex-direction: column;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (max-width: 576px) {
  .admin-drawer {
    width: 100vw;
    right: -100vw;
  }
}

.admin-drawer.active {
  right: 0;
}

.admin-drawer-header {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-surface-alt);
}

.admin-drawer-header h3 {
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.admin-drawer-header h3 svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.admin-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
}

.admin-nav-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg-surface-alt);
}

.admin-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 0.85rem 0;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.admin-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

[data-theme="dark"] .admin-tab.active {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
}

.admin-drawer-body {
  flex-grow: 1;
  padding: var(--space-md);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.admin-section-pane {
  display: none;
}

.admin-section-pane.active {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.admin-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.admin-input-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.admin-text-input {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.admin-text-input:focus {
  border-color: var(--primary);
  background-color: var(--bg-surface);
}

.admin-footer-actions {
  padding: var(--space-md);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space-sm);
  background-color: var(--bg-surface-alt);
}

.admin-footer-actions button {
  flex: 1;
}

/* Floating admin indicator */
.admin-indicator-badge {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--accent);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.8rem;
  z-index: 1400;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Inquiry Card Styles for Admin Inbox */
.inquiry-card {
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  position: relative;
  transition: border-color var(--transition-fast);
}

.inquiry-card:hover {
  border-color: var(--primary);
}

.inquiry-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 4px;
}

.inquiry-card-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.inquiry-card-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: right;
}

.inquiry-card-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.inquiry-card-detail-item {
  display: flex;
  flex-direction: column;
}

.inquiry-card-body {
  font-size: 0.8rem;
  background-color: var(--bg-surface);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text-main);
  white-space: pre-wrap;
  margin-top: 4px;
}

.inquiry-card-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 2px;
}

.inquiry-delete-btn {
  background: none;
  border: none;
  color: #ef4444;
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.inquiry-delete-btn:hover {
  background-color: rgba(239, 68, 68, 0.08);
}

/* --- Dental Charting Layout --- */
.dental-chart-layout {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-top: 6px;
}

.dental-row-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.dental-teeth-rowUpper, .dental-teeth-rowLower {
  display: flex;
  justify-content: space-between;
  gap: 3px;
}

.tooth-btn {
  flex: 1;
  aspect-ratio: 0.95;
  background-color: var(--bg-surface-alt);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-main);
  transition: all var(--transition-fast);
  padding: 2px 0;
  user-select: none;
}

.tooth-btn:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.tooth-btn.healthy {
  background-color: rgba(16, 185, 129, 0.12);
  border-color: var(--accent);
  color: #065f46;
}
[data-theme="dark"] .tooth-btn.healthy {
  color: #a7f3d0;
}

.tooth-btn.decay {
  background-color: rgba(239, 68, 68, 0.12);
  border-color: #ef4444;
  color: #991b1b;
}
[data-theme="dark"] .tooth-btn.decay {
  color: #fca5a5;
}

.tooth-btn.restored {
  background-color: rgba(59, 130, 246, 0.12);
  border-color: #3b82f6;
  color: #1e3a8a;
}
[data-theme="dark"] .tooth-btn.restored {
  color: #93c5fd;
}

.tooth-btn.missing {
  background-color: rgba(148, 163, 184, 0.12);
  border-color: #94a3b8;
  color: #475569;
}
[data-theme="dark"] .tooth-btn.missing {
  color: #cbd5e1;
}

.tooth-btn span {
  font-size: 0.45rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 1px;
}