@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:ital,wght@0,300..900;1,300..900&family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&family=Space+Grotesk:wght@400;500;700&display=swap');

/* Ztreecloud Design System Tokens */
:root {
  --surface-page: #FEF7F2;      /* Cream Base */
  --surface-card: #FFFCFA;      /* Near-White */
  --text-main: #271512;         /* Deep Umber */
  --accent-primary: #735D59;    /* Clay Brown */
  --border-color: #E7DBD5;      /* Pale Beige / Sand Tint */
  --sand-tint-hover: #F6EEEA;
  
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-xxl: 96px;
  --spacing-huge: 128px;
  
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter Tight', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--surface-page);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Rules */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-main);
}

h1 {
  font-size: 72px;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 48px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 32px;
  line-height: 1.25;
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: 24px;
  line-height: 1.3;
  margin-bottom: var(--spacing-xs);
}

p {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.65;
  margin-bottom: var(--spacing-md);
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-sm);
  display: inline-block;
}

.font-mono {
  font-family: var(--font-mono);
}

/* Layout Elements */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.hero-section {
  padding: var(--spacing-huge) 0 var(--spacing-xxl) 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.text-left {
  text-align: left;
}

.text-center {
  text-align: center;
}

.flex-align-center {
  display: flex;
  align-items: center;
}

.flex-justify-between {
  display: flex;
  justify-content: space-between;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.mb-none {
  margin-bottom: 0 !important;
}

/* Header & Global Nav (70/30 Brand Rule) */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(254, 247, 242, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-sm) 0;
}

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

.brand-wrapper {
  display: flex;
  align-items: baseline;
  text-decoration: none;
  color: var(--text-main);
}

.brand-primary {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
}

.brand-domain {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-primary);
  margin-left: var(--spacing-xs);
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-speed);
}

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

/* Dropdown Menu styling */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-sm);
  width: 260px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.25s var(--transition-ease);
  z-index: 100;
  box-shadow: 0 4px 24px rgba(39, 21, 18, 0.03);
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-link {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--text-main);
  text-decoration: none;
  font-size: 15px;
  border-radius: 6px;
  transition: background var(--transition-speed);
}

.dropdown-link:hover {
  background-color: var(--sand-tint-hover);
  color: var(--text-main);
}

.dropdown-link span {
  display: block;
  font-size: 12px;
  color: var(--accent-primary);
  margin-top: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px var(--spacing-lg);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition-speed) var(--transition-ease);
  min-height: 48px;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--sand-tint-hover);
}

.btn-accent {
  background-color: var(--accent-primary);
  color: var(--surface-card);
  border: 1px solid var(--accent-primary);
}

.btn-accent:hover {
  background-color: var(--text-main);
  border-color: var(--text-main);
}

.btn-link {
  background: none;
  border: none;
  color: var(--text-main);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-speed);
}

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

/* Cards */
.card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: var(--spacing-lg);
  transition: border-color var(--transition-speed);
  position: relative;
}

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

.card-number {
  font-family: var(--font-mono);
  font-size: 32px;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-sm);
}

/* Metrics Displays */
.metric-grid {
  margin-top: var(--spacing-xl);
}

.metric-card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: var(--spacing-lg);
  text-align: left;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: var(--spacing-xs);
}

.metric-label {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--accent-primary);
}

/* Mobile Nav Styles */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px var(--spacing-sm);
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  color: var(--text-main);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  min-height: 40px;
}

/* Sidebar Drawer for mobile */
.nav-mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 400px;
  height: 100%;
  background-color: var(--surface-page);
  border-left: 1px solid var(--border-color);
  z-index: 1001;
  padding: var(--spacing-xl) var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  transition: right var(--transition-speed) var(--transition-ease);
}

.nav-mobile-drawer.active {
  right: 0;
}

.drawer-close {
  align-self: flex-end;
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px var(--spacing-sm);
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.mobile-nav-group-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-xs);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.mobile-nav-link {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
}

.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(39, 21, 18, 0.4);
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
  transition: all var(--transition-speed);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Footer Section */
footer {
  background-color: var(--surface-card);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xxl) 0 var(--spacing-xl) 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xxl);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
}

.footer-tagline {
  font-size: 16px;
  color: var(--accent-primary);
  max-width: 320px;
}

.footer-heading {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-primary);
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: 16px;
  transition: color var(--transition-speed);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.corporate-info {
  font-size: 14px;
  color: var(--accent-primary);
  line-height: 1.6;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-legal-link {
  font-size: 14px;
  color: var(--text-main);
  text-decoration: none;
}

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

/* Animations */
.fade-up-element {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--transition-ease), transform 0.6s var(--transition-ease);
}

.fade-up-element.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Interactive Sandbox (Live Demo) */
.demo-window {
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  margin-top: var(--spacing-xl);
  min-height: 580px;
  display: flex;
  flex-direction: column;
}

.demo-header {
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--surface-page);
}

.demo-title-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.demo-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--border-color);
}

.demo-dot:nth-child(1) { background-color: #e57373; }
.demo-dot:nth-child(2) { background-color: #ffb74d; }
.demo-dot:nth-child(3) { background-color: #81c784; }

.demo-tabs {
  display: flex;
  gap: var(--spacing-xs);
}

.demo-tab {
  background: none;
  border: 1px solid transparent;
  padding: 8px 16px;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
  cursor: pointer;
  transition: all var(--transition-speed);
}

.demo-tab.active {
  background-color: var(--surface-card);
  border-color: var(--border-color);
  color: var(--text-main);
}

.demo-content {
  flex-grow: 1;
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.demo-panel {
  display: none;
}

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

/* Sandbox Alerts List */
.sandbox-alerts-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.sandbox-alert-item {
  background-color: var(--surface-page);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.sandbox-alert-item:hover {
  border-color: var(--accent-primary);
  background-color: var(--surface-card);
}

.alert-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.alert-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.alert-indicator.red { background-color: #d32f2f; }
.alert-indicator.orange { background-color: #f57c00; }
.alert-indicator.yellow { background-color: #fbc02d; }

.alert-title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 16px;
}

.alert-amount {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
}

/* Sidebar detail inside live demo */
.sandbox-sidebar {
  position: absolute;
  top: 0;
  right: -100%;
  width: 450px;
  height: 100%;
  background-color: var(--surface-card);
  border-left: 1px solid var(--border-color);
  box-shadow: -10px 0 30px rgba(39, 21, 18, 0.05);
  transition: right var(--transition-speed) var(--transition-ease);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  z-index: 10;
}

.sandbox-sidebar.active {
  right: 0;
}

.sandbox-sidebar-close {
  align-self: flex-start;
  background: none;
  border: 1px solid var(--border-color);
  padding: 4px 12px;
  border-radius: 100px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
}

/* Chat UI in Demo */
.chat-window {
  display: flex;
  flex-direction: column;
  height: 400px;
}

.chat-messages {
  flex-grow: 1;
  overflow-y: auto;
  padding-bottom: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.chat-message {
  max-width: 85%;
  padding: var(--spacing-sm);
  border-radius: 12px;
  font-size: 15px;
}

.chat-message.user {
  background-color: var(--surface-page);
  align-self: flex-end;
  border: 1px solid var(--border-color);
}

.chat-message.ai {
  background-color: var(--surface-card);
  align-self: flex-start;
  border: 1px solid var(--border-color);
}

.chat-input-bar {
  display: flex;
  gap: var(--spacing-xs);
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-sm);
}

.chat-input {
  flex-grow: 1;
  background-color: var(--surface-page);
  border: 1px solid var(--border-color);
  padding: 12px var(--spacing-md);
  border-radius: 100px;
  font-family: var(--font-body);
  color: var(--text-main);
  outline: none;
}

.chat-input:focus {
  border-color: var(--accent-primary);
}

/* ROI Calculator Styles */
.roi-card {
  padding: var(--spacing-xl);
}

.slider-group {
  margin-bottom: var(--spacing-lg);
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.slider-label {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.slider-value {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-primary);
}

.custom-range {
  width: 100%;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 5px;
  background: var(--border-color);
  outline: none;
}

.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  transition: background var(--transition-speed);
}

.custom-range::-webkit-slider-thumb:hover {
  background: var(--text-main);
}

.roi-output-box {
  background-color: var(--surface-page);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.roi-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: var(--spacing-xs);
}

.roi-stat-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.roi-stat-label {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--accent-primary);
}

.roi-stat-value {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
}

.roi-stat-value.highlight {
  font-size: 36px;
}

/* Generic Form Styles */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.form-label {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}

.form-input, .form-textarea, .form-select {
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  padding: 12px var(--spacing-md);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text-main);
  outline: none;
  transition: border-color var(--transition-speed);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--accent-primary);
}

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

/* Pricing Grid Extras */
.pricing-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pricing-card.popular {
  border-color: var(--accent-primary);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 32px;
  background-color: var(--accent-primary);
  color: var(--surface-card);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.5px;
}

.pricing-price-box {
  margin: var(--spacing-md) 0;
}

.price-period {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--accent-primary);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 16px;
}

.pricing-feature-icon {
  color: var(--accent-primary);
  font-size: 16px;
}

.compute-disclaimer-box {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-md);
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
}

/* Grid layout responsiveness rules */
@media (max-width: 1024px) {
  h1 { font-size: 48px; }
  h2 { font-size: 36px; }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  h3 { font-size: 24px; }
  
  section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-section {
    padding: var(--spacing-xxl) 0 var(--spacing-xl) 0;
  }
  
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: inline-flex;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .sandbox-sidebar {
    width: 100%;
    right: -100%;
  }
  
  .demo-window {
    min-height: auto;
  }
  
  .demo-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .demo-tabs {
    flex-wrap: wrap;
  }
  
  .demo-tab {
    flex-grow: 1;
    text-align: center;
  }
}