/* style.css – Premium Modern Design */
:root {
  /* Modern Palette */
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-text: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-primary: #38bdf8;
  /* Sky Blue */
  --color-secondary: #818cf8;
  /* Indigo */
  --color-accent: #2dd4bf;
  /* Teal */
  --color-border: rgba(255, 255, 255, 0.1);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Overrides (if toggled) */
[data-theme='light'] {
  --color-bg: #f0f4f8;
  --color-bg-secondary: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-primary: #0284c7;
  --color-secondary: #6366f1;
  --color-accent: #0d9488;
  --color-border: rgba(0, 0, 0, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  scroll-behavior: smooth;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1,
h2,
h3 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  position: relative;
  display: inline-block;
  margin-bottom: 2.5rem;
}

h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 60px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}

p,
li {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-base);
}

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

/* Button Reset */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Header */
header.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
  background: rgba(15, 23, 42, 0.85);
  /* Dark semi-transparent */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
}

[data-theme='light'] header.site-header {
  background: rgba(255, 255, 255, 0.85);
}

.logo {
  height: 40px;
  object-fit: contain;
}

nav.nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

nav.nav a {
  color: var(--color-text);
  font-size: 0.95rem;
  position: relative;
}

nav.nav a::before {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

nav.nav a:hover::before {
  width: 100%;
}

#dark-mode-toggle {
  font-size: 1.5rem;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition-base);
}

#dark-mode-toggle:hover {
  background: var(--color-bg-secondary);
  transform: rotate(15deg);
}

/* Sections */
.section {
  padding: 6rem 5%;
  max-width: 1400px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.1) 0%, transparent 40%),
    radial-gradient(circle at bottom left, rgba(129, 140, 248, 0.1) 0%, transparent 40%);
}

.hero p {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  margin-bottom: 3rem;
  max-width: 600px;
  color: var(--color-text-muted);
}

/* CTA Button */
.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #ffffff !important;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
  transition: var(--transition-base);
  border: 1px solid transparent;
}

.cta-button:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.5);
  filter: brightness(1.1);
}

/* Cards & Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.card h3 {
  font-size: 1.25rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

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

/* Project Cards Specifics */
.project {
  text-align: left;
  justify-content: flex-start;
  position: relative;
  overflow: hidden;
}

.project::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

/* Services & Testimonials Overrides */
.services .card,
.testimonials .card {
  justify-content: flex-start;
  text-align: left;
}

.services .card {
  border-top: 4px solid var(--color-primary);
}

.ai-case-studies .card {
  border-top: 4px solid var(--color-secondary);
}

/* Testimonials Specifics */
.testimonials .card {
  position: relative;
  border-left: 4px solid var(--color-accent);
  padding: 2.5rem 2rem 2rem 3rem;
  /* Extra left padding for quote */
}

.testimonials .card::before {
  content: '"';
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  font-size: 5rem;
  color: var(--color-border);
  font-family: serif;
  line-height: 1;
  opacity: 0.5;
}

.testimonials .card p:first-of-type {
  font-style: italic;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  position: relative;
  z-index: 1;
}

.testimonials .card .author {
  font-weight: 700;
  color: var(--color-text);
  margin-top: auto;
  font-size: 1rem;
  display: block;
}

/* Timeline */
.timeline-list {
  position: relative;
  padding-left: 2rem;
  list-style: none;
}

.timeline-list::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 2px;
  background: var(--color-border);
}

.timeline-list li {
  position: relative;
  margin-bottom: 2.5rem;
  padding-left: 1rem;
}

.timeline-list li::after {
  content: '';
  position: absolute;
  left: -2.35rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 4px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.timeline-list strong {
  display: block;
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

/* Form Styles */
form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
}

input,
textarea {
  width: 100%;
  padding: 1rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: var(--transition-base);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

textarea {
  min-height: 150px;
  resize: vertical;
}

/* Footer */
footer.site-footer {
  background: var(--color-bg-secondary);
  text-align: center;
  padding: 4rem 2rem;
  margin-top: 4rem;
  border-top: 1px solid var(--color-border);
}

footer .nav {
  margin: 2rem 0;
  justify-content: center;
}

/* Animation Utilities */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  .section {
    padding: 4rem 1.5rem;
  }

  header.site-header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  nav.nav {
    gap: 1rem;
    font-size: 0.9rem;
  }
}

/* Cursor Animation */
.cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  color: var(--color-accent);
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}