:root {
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    --accent: #2563eb;
    --accent-light: #3b82f6;
    
    --border: #e2e8f0;
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --shadow-sm: 0 4px 12px rgba(0,0,0,0.03);
    --shadow-md: 0 12px 32px rgba(0,0,0,0.05);
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-color);
    background-image: radial-gradient(#e2e8f0 1px, transparent 1px);
    background-size: 24px 24px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Utilities */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 70px 0;
}

.bg-light { background-color: var(--bg-light); }
.bg-dark { 
    background-color: var(--bg-dark); 
    color: var(--text-inverse);
}
.bg-dark .text-muted { color: #a1a1aa; }

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

p {
    color: var(--text-muted);
}
.bg-dark p.text-muted { color: #a1a1aa; }

/* Buttons & Chips */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: var(--font-sans);
}

.btn-primary {
    background-color: var(--accent);
    color: var(--text-inverse);
}
.btn-primary:hover {
    background-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-main);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background-color: #eee;
}

.btn-text {
    background: transparent;
    color: var(--text-main);
    padding: 14px 16px;
}
.btn-text:hover {
    opacity: 0.7;
}

.btn-full { width: 100%; }
.btn-small { padding: 8px 0; font-size: 0.875rem; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}
.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}
.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
}

/* Hero Section */
.hero {
    padding: 160px 0 80px;
    text-align: center;
    background: radial-gradient(circle at center top, #eff6ff 0%, transparent 100%);
}
.hero-content {
    max-width: 800px;
    margin: 0 auto;
}
.badge {
    display: inline-block;
    padding: 6px 12px;
    background: #f1f5f9;
    color: #475569;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid #e2e8f0;
}
.hero-title {
    font-size: 4rem;
    margin-bottom: 24px;
}
.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 40px;
    color: var(--text-muted);
}
.hero-cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 64px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}
.card {
    background: var(--bg-color);
    padding: 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    border-top: 4px solid var(--accent);
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.card-icon {
    font-size: 2rem;
    color: var(--text-main);
    margin-bottom: 24px;
}
.card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

/* Audiences List */
.audience-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.audience-item {
    display: flex;
    flex-direction: column;
    padding: 32px;
    border-radius: var(--radius-md);
    background: var(--bg-color);
    border: 1px solid var(--border);
}
.audience-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.audience-title i {
    font-size: 1.5rem;
    color: var(--text-main);
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 24px;
}
.profile-card {
    display: flex;
    gap: 24px;
    background: var(--bg-color);
    padding: 32px;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 30px rgba(0,0,0,0.04);
    border: 1px solid var(--border);
    border-top: 4px solid var(--accent);
}
.profile-avatar-img {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-md);
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    background-color: var(--bg-light);
}

.linkedin-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    margin-top: 16px;
}
.linkedin-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}
.profile-info h3 {
    margin-bottom: 12px;
}
.profile-bio {
    margin-bottom: 16px;
    font-size: 0.95rem;
}
.profile-focus {
    padding: 12px 16px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-main);
}

/* How It Works Steps */
.steps-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}
@media (min-width: 768px) {
    .steps-container::before {
        content: '';
        position: absolute;
        top: 24px;
        left: 50px;
        right: 50px;
        height: 1px;
        background: var(--border);
        z-index: 0;
    }
}
.step {
    position: relative;
    z-index: 1;
    text-align: center;
}
.step-number {
    width: 48px;
    height: 48px;
    background: var(--bg-color);
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin: 0 auto 24px;
    font-size: 1.25rem;
}
.step h4 { margin-bottom: 8px; }
.step p { font-size: 0.875rem; }

/* Booking Section */
.booking-container {
    max-width: 600px;
}
.booking-content {
    background: var(--bg-color);
    padding: 48px;
    border-radius: var(--radius-lg);
    color: var(--text-main);
}
.booking-content h2 { margin-bottom: 8px; }
.booking-content > p { margin-bottom: 32px; }

.form-group {
    margin-bottom: 24px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    color: var(--accent);
}

.form-input,
.form-select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    background: #fff;
    transition: var(--transition);
}
.form-select { cursor: pointer; }
.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.dynamic-fields {
    background: var(--bg-light);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    border: 1px solid var(--border);
}
.hidden { display: none !important; }

/* Custom Radio Chips */
.chip-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.vertical-chips {
    flex-direction: column;
}
.chip {
    cursor: pointer;
    flex: 1;
}
.chip input[type="radio"] {
    display: none;
}
.chip span {
    display: block;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: var(--transition);
    background: var(--bg-light);
    font-size: 0.95rem;
}
.vertical-chips .chip span { text-align: left; }
.chip input[type="radio"]:checked + span {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.calendar-header {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
    gap: 16px;
}
.calendar-header h3 { margin: 0; }
.calendar-embed-placeholder {
    height: 400px;
    border: 1px dashed #cbd5e1;
    border-radius: var(--radius-md);
    background: #f8fafc;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    text-align: center;
}

/* Footer */
.footer {
    padding: 64px 0 24px;
    border-top: 1px solid var(--border);
}
.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 64px;
}
.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links h4 { margin-bottom: 4px; }
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--text-main); }
.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    padding-top: 24px;
}

/* Animations */
.fade-in {
    opacity: 0;
    transition: opacity 0.8s ease-out;
}
.fade-in.appear { opacity: 1; }

.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.fade-in-up.appear {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .hero-cta-group { flex-direction: column; }
    .hero-cta-group .btn { width: 100%; }
    .steps-container { grid-template-columns: 1fr; }
    .step {
        display: flex;
        align-items: flex-start;
        text-align: left;
        gap: 16px;
    }
    .step-number { margin: 0; flex-shrink: 0; }
    .about-grid { grid-template-columns: 1fr; }
    .profile-card { flex-direction: column; }
}