:root {
    --bg-main: #0B0F19;
    --bg-card: rgba(21, 29, 46, 0.6);
    --bg-card-border: rgba(255, 255, 255, 0.08);
    --primary: #6366F1;
    --primary-hover: #4F46E5;
    --accent: #06B6D4;
    --text-main: #F3F4F6;
    --text-muted: #9CA3AF;
    --font-family: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Common Typography & Styles */
h1, h2, h3 {
    color: #FFFFFF;
    font-weight: 700;
}

h2 {
    font-size: 2.25rem;
    line-height: 1.3;
    margin-bottom: 16px;
}

p {
    color: var(--text-muted);
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #818CF8;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 20px;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--bg-card-border);
    border-radius: 16px;
    padding: 32px;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #FFF;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    opacity: 0.9;
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #FFF;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #FFF;
}

.btn-outline:hover {
    border-color: #FFF;
    background: rgba(255, 255, 255, 0.05);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--bg-card-border);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #FFF;
    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #FFF;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, rgba(6, 182, 212, 0.1) 40%, transparent 70%);
    filter: blur(60px);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero h1 {
    font-size: 3.25rem;
    line-height: 1.2;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero .subtitle {
    font-size: 1.35rem;
    color: #E2E8F0;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-text {
    font-size: 1.1rem;
    margin-bottom: 40px;
}

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

/* Grids & Sections */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.grid {
    display: grid;
    gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.card h3 {
    margin-bottom: 12px;
    font-size: 1.2rem;
}

/* Section 3: Highlight Box & Symptoms */
.highlight-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 50px;
}

.highlight-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.subsection-title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.symptom-card {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 16px;
    padding: 24px;
    position: relative;
}

.card-number {
    font-size: 2rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.1);
    margin-bottom: 8px;
}

.symptom-card p {
    color: #E2E8F0;
}

/* Section 4: Timeline Method */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: #FFF;
    flex-shrink: 0;
}

/* Section 6: Principle */
.principle-box {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.check-list {
    list-style: none;
    margin-top: 30px;
    text-align: left;
    display: inline-block;
}

.check-list li {
    margin-bottom: 16px;
    font-size: 1.1rem;
    color: #E2E8F0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.check-list span {
    color: var(--accent);
    font-weight: bold;
}

/* Section 6.5: Formats of Work */
.format-card {
    position: relative;
}

.format-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--accent);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

/* Section 7: CTA Form */
.cta-card {
    max-width: 650px;
    margin: 0 auto;
    text-align: center;
}

.cta-form {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input {
    width: 100%;
    padding: 16px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--bg-card-border);
    color: #FFF;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    border-color: var(--primary);
}

.btn-block {
    width: 100%;
}

.form-status {
    margin-top: 16px;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--bg-card-border);
    text-align: center;
    font-size: 0.9rem;
}

/* Mobile Responsiveness */
@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-4 { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2.25rem; }
    .hero .subtitle { font-size: 1.1rem; }
    .nav { display: none; }
    .timeline-step { flex-direction: column; }
}