/**
 * OpenClaw Design System v2.0 - REDESIGNED
 * Premium, Modern, WOW Effect
 * 
 * Typography: Space Grotesk (Display) + Inter (Body)
 * Style: Minimal but Premium, No Gradients, Clean
 */

/* ==========================================================================
   CSS Variables - Premium Design Tokens
   ========================================================================== */

:root {
  /* Colors - Refined Palette */
  --color-black: #0A0A0A;
  --color-gray-950: #0F0F0F;
  --color-gray-900: #171717;
  --color-gray-800: #262626;
  --color-gray-700: #3D3D3D;
  --color-gray-600: #525252;
  --color-gray-500: #737373;
  --color-gray-400: #A3A3A3;
  --color-gray-300: #D4D4D4;
  --color-gray-200: #E5E5E5;
  --color-gray-100: #F5F5F5;
  --color-gray-50: #FAFAFA;
  --color-white: #FFFFFF;

  /* Primary - Bold Red */
  --color-primary: #BD2D2D;
  --color-primary-hover: #A02626;
  --color-primary-light: #FEE2E2;
  --color-primary-dark: #8B1F1F;
  --color-primary-rgb: 189, 45, 45;

  /* Typography - Modern Fonts */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Type Scale - More Dramatic */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;
  --text-7xl: 6rem;

  /* Spacing - Generous */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;

  /* Border Radius - Refined */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows - Subtle but Premium */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.06), 0 4px 8px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.08), 0 12px 24px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 32px 64px rgba(0, 0, 0, 0.12), 0 16px 32px rgba(0, 0, 0, 0.06);
  
  /* Card shadow with subtle border */
  --shadow-card: 0 0 0 1px rgba(0, 0, 0, 0.03), 0 2px 4px rgba(0, 0, 0, 0.04), 0 12px 24px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 0 0 1px rgba(0, 0, 0, 0.06), 0 8px 16px rgba(0, 0, 0, 0.08), 0 24px 48px rgba(0, 0, 0, 0.08);

  /* Animation - Smooth & Refined */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out-cubic: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;
  --duration-slowest: 1000ms;

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* Desktop Scaling */
@media (min-width: 768px) {
  :root {
    --text-4xl: 3.5rem;
    --text-5xl: 4.5rem;
    --text-6xl: 6rem;
    --text-7xl: 8rem;
  }
}

@media (min-width: 1024px) {
  :root {
    --text-5xl: 5rem;
    --text-6xl: 7rem;
    --text-7xl: 9rem;
  }
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.7;
  color: var(--color-black);
  background-color: var(--color-white);
  overflow-x: hidden;
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-white);
}

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

/* ==========================================================================
   Typography - Premium Feel
   ========================================================================== */

h1, h2, h3, h4, h5, h6, .display {
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

.display-hero {
  font-size: var(--text-5xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  letter-spacing: -0.03em;
}

@media (min-width: 768px) {
  .display-hero {
    font-size: var(--text-6xl);
  }
}

@media (min-width: 1024px) {
  .display-hero {
    font-size: var(--text-7xl);
  }
}

h1, .h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-6);
}

h2, .h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  h2, .h2 {
    font-size: var(--text-4xl);
  }
}

h3, .h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

h4, .h4 {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
}

.lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-gray-600);
}

@media (min-width: 768px) {
  .lead {
    font-size: var(--text-xl);
  }
}

.text-sm {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
}

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-gray-500); }
.text-light { color: var(--color-gray-400); }

/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Links */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out-quart);
}

a:hover {
  color: var(--color-primary);
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-12);
  }
}

.container-narrow {
  max-width: 720px;
}

.container-wide {
  max-width: 1440px;
}

/* Sections */
.section {
  padding: var(--space-20) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-32) 0;
  }
}

.section-header {
  max-width: 640px;
  margin: 0 auto var(--space-16);
  text-align: center;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid { gap: var(--space-8); }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .grid { gap: var(--space-10); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Flex utilities */
.flex { display: flex; }
.flex-center { align-items: center; justify-content: center; }
.flex-between { align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ==========================================================================
   Buttons - Premium Style
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out-quart);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out-quart);
}

.btn:hover::before {
  opacity: 0.1;
}

.btn:active {
  transform: scale(0.98);
}

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(var(--color-primary-rgb), 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 8px 24px rgba(var(--color-primary-rgb), 0.35);
  transform: translateY(-2px);
  color: var(--color-white);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-black);
  box-shadow: inset 0 0 0 1.5px var(--color-gray-200);
}

.btn-secondary:hover {
  box-shadow: inset 0 0 0 1.5px var(--color-black);
  transform: translateY(-2px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-black);
  padding: var(--space-3) var(--space-4);
}

.btn-ghost:hover {
  background-color: var(--color-gray-100);
}

/* Button icon */
.btn-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--duration-normal) var(--ease-out-quart);
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

/* ==========================================================================
   Cards - Elevated Design
   ========================================================================== */

.card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  transition: all var(--duration-slow) var(--ease-out-quart);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out-quart);
  pointer-events: none;
  box-shadow: var(--shadow-card-hover);
}

.card:hover {
  transform: translateY(-4px);
}

.card:hover::before {
  opacity: 1;
}

/* Feature Card */
.feature-card {
  padding: var(--space-10);
  text-align: left;
  background: var(--color-gray-50);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-100);
  transition: all var(--duration-slow) var(--ease-out-quart);
}

.feature-card:hover {
  background: var(--color-white);
  border-color: transparent;
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-6);
  color: var(--color-primary);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
  transition: transform var(--duration-slow) var(--ease-spring);
}

.feature-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
  color: var(--color-black);
}

.feature-description {
  color: var(--color-gray-600);
  line-height: 1.7;
  margin: 0;
}

/* ==========================================================================
   Animations - Smooth & Premium
   ========================================================================== */

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

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

/* Stagger children */
.stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.stagger.revealed > *:nth-child(1) { transition-delay: 0ms; }
.stagger.revealed > *:nth-child(2) { transition-delay: 100ms; }
.stagger.revealed > *:nth-child(3) { transition-delay: 200ms; }
.stagger.revealed > *:nth-child(4) { transition-delay: 300ms; }
.stagger.revealed > *:nth-child(5) { transition-delay: 400ms; }
.stagger.revealed > *:nth-child(6) { transition-delay: 500ms; }
.stagger.revealed > *:nth-child(7) { transition-delay: 600ms; }
.stagger.revealed > *:nth-child(8) { transition-delay: 700ms; }

.stagger.revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* Fade up */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-up {
  animation: fadeUp var(--duration-slower) var(--ease-out-expo) forwards;
}

.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }
.delay-5 { animation-delay: 500ms; }

/* Scale in */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-scale-in {
  animation: scaleIn var(--duration-slower) var(--ease-out-expo) forwards;
}

/* Float animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Pulse subtle */
@keyframes pulse-subtle {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.animate-pulse {
  animation: pulse-subtle 3s ease-in-out infinite;
}

/* ==========================================================================
   Form Elements
   ========================================================================== */

.input {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-black);
  background: var(--color-white);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  outline: none;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(var(--color-primary-rgb), 0.1);
}

.input::placeholder {
  color: var(--color-gray-400);
}

/* ==========================================================================
   Utilities
   ========================================================================== */

/* Spacing */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }
.mt-20 { margin-top: var(--space-20); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }
.mb-20 { margin-bottom: var(--space-20); }

/* Background */
.bg-white { background-color: var(--color-white); }
.bg-gray { background-color: var(--color-gray-50); }
.bg-dark { 
  background-color: var(--color-gray-950); 
  color: var(--color-white);
}

/* Max widths */
.max-w-sm { max-width: 480px; }
.max-w-md { max-width: 640px; }
.max-w-lg { max-width: 800px; }
.max-w-xl { max-width: 1024px; }

.mx-auto { margin-left: auto; margin-right: auto; }

/* Visibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal, .stagger > * {
    opacity: 1;
    transform: none;
  }
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ==========================================================================
   Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-gray-100);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}