/* ============================================
   Krishna Kanth B — AI Consulting Website
   CSS Variables & Theme System
   ============================================ */

:root {
    /* Dark theme (default) */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #1a1a24;
    --bg-card: rgba(255,255,255,0.03);
    --bg-glass: rgba(255,255,255,0.05);
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.15);
    --text-primary: #f0f0f5;
    --text-secondary: #c2c2d6;
    --text-tertiary: #8f8fa6;
    --accent: #10b981;
    --accent-hover: #34d399;
    --accent-subtle: rgba(16, 185, 129, 0.1);
    --accent-gradient: linear-gradient(135deg, #10b981, #14b8a6);
    --gradient-hero: linear-gradient(135deg, #10b981 0%, #14b8a6 50%, #10b981 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-heading: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    --nav-height: 72px;
    --container: 1200px;
    --container-padding: 24px;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f1f3;
    --bg-card: rgba(0,0,0,0.02);
    --bg-glass: rgba(255,255,255,0.7);
    --border: rgba(0,0,0,0.08);
    --border-hover: rgba(0,0,0,0.15);
    --text-primary: #0f0f1a;
    --text-secondary: #3b3b4f;
    --text-tertiary: #6a6a80;
    --accent: #10b981;
    --accent-hover: #059669;
    --accent-subtle: rgba(16, 185, 129, 0.08);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

html.smooth-scroll {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    width: 100%;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   Scroll Progress
   ============================================ */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent-gradient);
    z-index: 10001;
    width: 0%;
    transition: none;
}

/* ============================================
   Loader
   ============================================ */
.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

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

.loader-logo {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 24px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loader-bar {
    width: 200px;
    height: 3px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.loader-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 3px;
    animation: loaderFill 1.2s ease-in-out forwards;
}

@keyframes loaderFill {
    0% { width: 0; }
    100% { width: 100%; }
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: transparent;
    transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
    background: var(--bg-primary);
    background: color-mix(in srgb, var(--bg-primary) 80%, transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}

.nav-link:hover::after { width: 100%; }

.nav-cta {
    background: var(--accent);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.nav-cta:hover { background: var(--accent-hover); }
.nav-cta::after { display: none; }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: background var(--transition), color var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

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

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    padding: 4px 0;
}

.nav-hamburger span {
    display: block;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: var(--nav-height);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    top: -40%;
    left: -20%;
    width: 140%;
    height: 140%;
    background: radial-gradient(ellipse at 30% 50%, rgba(99,102,241,0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 30%, rgba(168,85,247,0.12) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(99,102,241,0.08) 0%, transparent 50%);
    animation: heroShift 20s ease-in-out infinite alternate;
}

@keyframes heroShift {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-3%, 2%) scale(1.05); }
    100% { transform: translate(3%, -2%) scale(1); }
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.4;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 80px 0;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 100px;
    background: var(--accent-subtle);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 32px;
    letter-spacing: 0.5px;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

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

.hero-stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.hero-stat-plus {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.hero-stat-label {
    display: block;
    font-size: 1.05rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99,102,241,0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-ghost:hover {
    border-color: var(--border-hover);
    background: var(--bg-glass);
    color: var(--text-primary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-full { width: 100%; }

/* ============================================
   Sections
   ============================================ */
.section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-note {
    font-size: 1.05rem;
    color: var(--text-tertiary);
    margin-top: 12px;
    font-style: italic;
}

/* ============================================
   Glass Card
   ============================================ */
.glass {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
}

/* ============================================
   About Section
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 32px;
}

.about-highlight {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.about-highlight svg {
    color: #22c55e;
    flex-shrink: 0;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-card {
    padding: 32px;
}

.about-card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--accent-subtle);
    color: var(--accent);
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ============================================
   Services Section
   ============================================ */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.service-card {
    padding: 24px;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--accent-subtle);
    color: var(--accent);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-list li {
    font-size: 1.05rem;
    color: var(--text-tertiary);
    padding-left: 16px;
    position: relative;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.5;
}

/* ============================================
   Technologies Section
   ============================================ */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.tech-card {
    padding: 28px;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.tech-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
}

.tech-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.tech-card h3 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.tech-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ============================================
   Industries Section
   ============================================ */
.industries {
    background: var(--bg-secondary);
}

.industries-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.industry-card {
    padding: 24px;
    text-align: center;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

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

.industry-icon {
    width: 64px;
    height: 64px;
    margin: 0 0 16px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--accent-subtle);
    color: var(--accent);
    font-size: 1.5rem;
}

.industry-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.industry-card p {
    font-size: 1.05rem;
    color: var(--text-tertiary);
    line-height: 1.5;
}

/* ============================================
   Problems Section
   ============================================ */
.problems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.problem-card {
    padding: 28px 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: all var(--transition);
}

.problem-card:hover {
    transform: translateY(-4px);
    border-color: #f97316;
    background: rgba(249, 115, 22, 0.08);
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.15);
}

.problem-icon {
    color: #f97316;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.problem-card span {
    font-size: 0.95rem;
    color: var(--text-secondary);
    white-space: normal;
}

/* ============================================
   Benefits Section
   ============================================ */
.benefits {
    background: var(--bg-secondary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.benefit-card {
    padding: 36px;
    text-align: center;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.benefit-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
}

.benefit-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.benefit-unit {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    display: inline;
}

.benefit-card h3 {
    font-size: 1.05rem;
    margin: 12px 0 8px;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ============================================
   Why Section
   ============================================ */
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.why-card {
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    transition: all var(--transition);
}

.why-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    background: var(--bg-glass);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
}

.why-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--font-mono);
    margin-bottom: 16px;
}

.why-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.why-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ============================================
   Process Section
   ============================================ */
.process {
    background: var(--bg-secondary);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 60px;
    right: 60px;
    height: 2px;
    background: var(--border);
}

.process-step {
    text-align: center;
    position: relative;
}

.process-number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 20px;
    position: relative;
    z-index: 1;
}

.process-step h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.process-step p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ============================================
   Testimonials Section
   ============================================ */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    padding: 32px;
}

.testimonial-stars {
    color: #f59e0b;
    font-size: 1rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-subtle);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.testimonial-author strong {
    display: block;
    font-size: 1rem;
}

.testimonial-author span {
    font-size: 1.05rem;
    color: var(--text-tertiary);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    overflow: hidden;
    transition: border-color var(--transition);
}

.faq-item.active {
    border-color: var(--border-hover);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    text-align: left;
    color: var(--text-primary);
    transition: color var(--transition);
}

.faq-question:hover { color: var(--accent); }

.faq-chevron {
    flex-shrink: 0;
    transition: transform var(--transition);
    color: var(--text-tertiary);
}

.faq-item.active .faq-chevron {
    transform: rotate(180deg);
    color: var(--accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    position: relative;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
}

.cta-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(99,102,241,0.1) 0%, transparent 70%);
}

.cta-content {
    position: relative;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 32px;
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: start;
}

.contact-form { padding: 36px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-tertiary);
}

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

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
@media (max-width: 600px) {
    .contact-info {
        grid-template-columns: 1fr;
    }
}

.contact-card {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: border-color var(--transition);
}

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

.contact-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--accent-subtle);
    color: var(--accent);
    flex-shrink: 0;
}

.contact-card h3 {
    font-size: 1.05rem;
    margin-bottom: 2px;
}

.contact-card a,
.contact-card span {
    font-size: 1rem;
    color: var(--text-secondary);
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 64px 0 32px;
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-tertiary);
    font-size: 1rem;
    margin-top: 12px;
    max-width: 280px;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 1rem;
    color: var(--text-secondary);
}

.footer-links a:hover { color: var(--text-primary); }

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.footer-social a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-subtle);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 1.05rem;
    color: var(--text-tertiary);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 1.05rem;
    color: var(--text-tertiary);
}

.footer-legal a:hover { color: var(--text-secondary); }

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all var(--transition);
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* ============================================
   Scroll Reveal Animation
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.4,0,0.2,1), transform 0.6s cubic-bezier(0.4,0,0.2,1);
}

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

/* Stagger children */
.services-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.services-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.services-grid .reveal:nth-child(4) { transition-delay: 0.1s; }
.services-grid .reveal:nth-child(5) { transition-delay: 0.2s; }
.services-grid .reveal:nth-child(6) { transition-delay: 0.3s; }

.tech-grid .reveal:nth-child(2) { transition-delay: 0.05s; }
.tech-grid .reveal:nth-child(3) { transition-delay: 0.1s; }
.tech-grid .reveal:nth-child(4) { transition-delay: 0.05s; }
.tech-grid .reveal:nth-child(5) { transition-delay: 0.1s; }
.tech-grid .reveal:nth-child(6) { transition-delay: 0.15s; }

.benefits-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.benefits-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.benefits-grid .reveal:nth-child(4) { transition-delay: 0.1s; }
.benefits-grid .reveal:nth-child(5) { transition-delay: 0.2s; }
.benefits-grid .reveal:nth-child(6) { transition-delay: 0.3s; }

.why-grid .reveal:nth-child(2) { transition-delay: 0.05s; }
.why-grid .reveal:nth-child(3) { transition-delay: 0.1s; }
.why-grid .reveal:nth-child(4) { transition-delay: 0.15s; }
.why-grid .reveal:nth-child(5) { transition-delay: 0.05s; }
.why-grid .reveal:nth-child(6) { transition-delay: 0.1s; }
.why-grid .reveal:nth-child(7) { transition-delay: 0.15s; }
.why-grid .reveal:nth-child(8) { transition-delay: 0.2s; }

.process-timeline .reveal:nth-child(2) { transition-delay: 0.1s; }
.process-timeline .reveal:nth-child(3) { transition-delay: 0.2s; }
.process-timeline .reveal:nth-child(4) { transition-delay: 0.3s; }
.process-timeline .reveal:nth-child(5) { transition-delay: 0.1s; }
.process-timeline .reveal:nth-child(6) { transition-delay: 0.2s; }
.process-timeline .reveal:nth-child(7) { transition-delay: 0.3s; }
.process-timeline .reveal:nth-child(8) { transition-delay: 0.4s; }

.testimonials-grid .reveal:nth-child(2) { transition-delay: 0.15s; }
.testimonials-grid .reveal:nth-child(3) { transition-delay: 0.3s; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .benefits-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .process-timeline { grid-template-columns: repeat(2, 1fr); }
    .process-timeline::before { display: none; }
    .problems-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
        --container-padding: 20px;
    }

    .section { padding: 80px 0; }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 32px;
        gap: 0;
    }

    .nav-links.active { display: flex; }

    .nav-link {
        padding: 16px 0;
        font-size: 1.1rem;
        border-bottom: 1px solid var(--border);
        width: 100%;
    }

    .nav-link::after { display: none; }

    .nav-cta {
        margin-top: 16px;
        text-align: center;
        padding: 14px;
    }

    .nav-hamburger { display: flex; }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-highlights { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr; }
    .benefits-grid { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }
    .process-timeline { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .problems-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .hero-stats { gap: 32px; }
    .hero-stat-number { font-size: 2rem; }

    .footer-inner { flex-direction: column; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    .footer-links { justify-content: center; }

    .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .cta-actions { flex-direction: column; align-items: stretch; }
    .problems-grid { grid-template-columns: 1fr; }
    .hero-stats { flex-direction: column; gap: 24px; }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    html { scroll-behavior: auto; }
}

/* ============================================
   Focus Styles
   ============================================ */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn:focus-visible,
.faq-question:focus-visible,
.theme-toggle:focus-visible,
.nav-hamburger:focus-visible,
.back-to-top:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ============================================
   Selection
   ============================================ */
::selection {
    background: var(--accent);
    color: #fff;
}

/* ============================================
   Restored Tile Layouts
   ============================================ */
.tech-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
}
.tech-icon { font-size: 1.5rem; flex-shrink: 0; margin-bottom: 0; line-height: 1; }
.tech-content { display: flex; flex-direction: column; }
.tech-card h3 { font-size: 1rem; margin-bottom: 6px; line-height: 1.3; }
.tech-card p { font-size: 0.95rem; line-height: 1.5; }

.problem-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 28px 24px;
}
.problem-icon { font-size: 1.2rem; flex-shrink: 0; margin-bottom: 0; color: #f97316; }
.problem-card:hover { transform: translateY(-4px); background: rgba(249, 115, 22, 0.08); border-color: #f97316; box-shadow: 0 8px 24px rgba(249, 115, 22, 0.15); }
.problem-card:hover .problem-icon { color: #f97316; }

/* Restored Side-by-Side for Why & Benefit */
.why-card, .benefit-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}
.why-content, .benefit-content {
    display: flex;
    flex-direction: column;
    text-align: left;
}
.why-number, .benefit-icon {
    flex-shrink: 0;
    margin-bottom: 0;
}
.benefit-icon {
    display: flex;
    align-items: baseline;
}

/* Vertical Stack Layout for Services and Industries */
.service-card, .industry-card {
    flex: 0 1 calc(33.333% - 16px);
    min-width: 280px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
}
.service-content, .industry-content {
    display: flex;
    flex-direction: column;
    text-align: left;
    width: 100%;
}
.service-icon, .industry-icon {
    margin-bottom: 20px;
}
.service-card ul.service-list {
    margin-top: 12px;
}

@media (max-width: 768px) {
    .service-card, .industry-card {
        flex: 1 1 100%;
        min-width: unset;
        width: 100%;
    }
}


/* ============================================
   UI/UX Pro Max Enhancements
   ============================================ */
/* Heading Typography Upgrade */
h1, h2, h3, h4, .section-title, .hero-title, .nav-logo {
    font-family: var(--font-heading, var(--font-sans));
    letter-spacing: -0.02em;
}

/* Pulsing Badge Indicator */
.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    display: inline-block;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulse-ring 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    margin-right: 8px;
    vertical-align: middle;
}

@keyframes pulse-ring {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* Highlight Nav Pill */
.nav-highlight {
    color: var(--accent) !important;
    background: var(--accent-subtle);
    padding: 6px 14px !important;
    border-radius: 999px;
    border: 1px solid rgba(16, 185, 129, 0.25);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    font-weight: 600;
}

.nav-highlight:hover {
    background: var(--accent);
    color: #ffffff !important;
    box-shadow: 0 0 14px rgba(16, 185, 129, 0.35);
}

/* ============================================
   Case Studies & Enterprise Showcase
   ============================================ */
.case-studies {
    background: var(--bg-secondary);
    position: relative;
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.case-study-card {
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.case-study-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
}

.case-study-card.featured {
    border-color: rgba(16, 185, 129, 0.4);
    background: linear-gradient(145deg, rgba(16, 185, 129, 0.08) 0%, var(--bg-card) 100%);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.12);
}

.case-study-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
}

.case-study-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--accent-subtle);
    color: var(--accent);
    margin-bottom: 16px;
    width: fit-content;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.case-study-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.35;
    color: var(--text-primary);
}

.case-study-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-study-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.case-study-metric-chip {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 6px;
}

.case-study-metric-chip i {
    color: var(--accent);
    font-size: 0.75rem;
}

.case-study-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    transition: var(--transition);
}

.case-study-link:hover {
    color: var(--accent-hover);
    transform: translateX(4px);
}

/* Upgraded Vector Tech Icon Badges */
.tech-icon {
    width: 44px !important;
    height: 44px !important;
    border-radius: var(--radius-sm) !important;
    background: var(--accent-subtle) !important;
    color: var(--accent) !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 1.15rem !important;
    flex-shrink: 0 !important;
    margin-bottom: 0 !important;
    border: 1px solid rgba(16, 185, 129, 0.2) !important;
    transition: var(--transition) !important;
}

.tech-card:hover .tech-icon {
    background: var(--accent) !important;
    color: #ffffff !important;
    box-shadow: 0 0 16px rgba(16, 185, 129, 0.4) !important;
    transform: scale(1.06) !important;
}