/* ============================================
   DESIGN SYSTEM & GLOBAL STYLES
   Problem Solver's Consultants
   ============================================ */

:root {
  /* Colors - Extracted from Logo */
  --primary: #0099CC;        /* Bright Blue from logo circle */
  --accent: #E85C2B;         /* Orange-Red from logo */
  --accent-light: #FF7A45;   /* Lighter Orange-Red */
  --white: #FFFFFF;
  --light-bg: #F5F8FB;
  --text-dark: #1A1A2E;
  --text-muted: #7A96B0;     /* Muted Blue-Gray from logo text */
  --glass-bg: rgba(0, 153, 204, 0.08);
  --glass-border: rgba(0, 153, 204, 0.15);
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;

  /* Typography */
  --font-serif: 'Playfair Display', 'DM Serif Display', serif;
  --font-sans: 'DM Sans', 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Space Grotesk', 'JetBrains Mono', monospace;

  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 32px;
  --text-4xl: 40px;
  --text-5xl: 48px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Sizing */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
  --shadow-accent: 0 4px 15px rgba(232, 92, 43, 0.3), 0 8px 40px rgba(0, 153, 204, 0.2);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

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

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--white);
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--accent-light);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-muted);
  line-height: 1.7;
}

strong {
  color: var(--text-dark);
  font-weight: 700;
}

/* ============================================
   KEYFRAME ANIMATIONS - MODERN
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px) rotateX(10deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-40px) rotateX(-10deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px) rotateY(10deg);
  }
  to {
    opacity: 1;
    transform: translateX(0) rotateY(0deg);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px) rotateY(-10deg);
  }
  to {
    opacity: 1;
    transform: translateX(0) rotateY(0deg);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.85) rotateZ(-5deg);
  }
  to {
    opacity: 1;
    transform: scale(1) rotateZ(0deg);
  }
}

@keyframes slideInFromLeft {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes slideOutToLeft {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-100%);
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
    filter: brightness(1);
  }
  50% {
    background-position: 100% 50%;
    filter: brightness(1.1);
  }
  100% {
    background-position: 0% 50%;
    filter: brightness(1);
  }
}

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(0, 153, 204, 0.3), 0 4px 15px rgba(232, 92, 43, 0.2);
  }
  50% {
    box-shadow: 0 0 40px rgba(0, 153, 204, 0.6), 0 8px 30px rgba(232, 92, 43, 0.4);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-60px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(60px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rotateSlow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes countUp {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.container-lg {
  max-width: 1400px;
}

.container-sm {
  max-width: 900px;
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

.section-lg {
  padding: var(--spacing-3xl) 0;
}

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

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

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

.flex {
  display: flex;
}

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

.grid {
  display: grid;
}

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

.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-lg);
}

.hidden {
  display: none !important;
}

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

/* ============================================
   BUTTON STYLES
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  gap: var(--spacing-sm);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: #E06B0D;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(244, 123, 32, 0.4);
}

.btn-secondary {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--white);
}

.btn-ghost {
  color: var(--accent);
  background: transparent;
}

.btn-ghost:hover {
  background: rgba(244, 123, 32, 0.1);
}

.btn-sm {
  padding: 12px 24px;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 18px 32px;
  font-size: var(--text-lg);
}

.btn-block {
  width: 100%;
}

.btn::after {
  content: '';
  display: inline-block;
  width: 0;
  transition: width var(--transition-base);
}

.btn-primary::after {
  content: ' →';
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  h1 {
    font-size: var(--text-4xl);
  }

  h2 {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 768px) {
  body {
    padding-bottom: 120px;
  }

  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: var(--text-3xl);
  }

  h2 {
    font-size: var(--text-2xl);
  }

  h3 {
    font-size: var(--text-xl);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  .hidden-mobile {
    display: none !important;
  }
}

@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;
  }
}