/* Variables */
:root {
    /* Modern Color Palette - Turquoise Theme */
    --primary-color: #0d9488;
    --primary-light: #2dd4bf;
    --primary-dark: #0f766e;
    --secondary-color: #14b8a6;
    --accent-color: #5eead4;
    --text-color: #1e293b;
    --text-light: #475569;
    --text-lighter: #64748b;
    --text-white: #ffffff;
    --text-white-90: rgba(255, 255, 255, 0.9);
    --headline-color: #0f172a;  /* Darker, more distinct color for headlines */
    --background-color: #ffffff;
    --light-background: #f8fafc;
    --card-background: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #0d9488;
    --error-color: #ef4444;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Logo Colors - High Contrast Theme */
    --logo-blue: #0f766e;    /* Darker teal */
    --logo-teal: #0d9488;    /* Primary teal */
    --logo-cyan: #14b8a6;    /* Bright teal */
    --logo-mint: #2dd4bf;    /* Light teal */
    
    /* Responsive Breakpoints */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--light-background);
    background-image: 
        radial-gradient(at 40% 20%, hsla(168, 100%, 90%, 0.05) 0px, transparent 50%),
        radial-gradient(at 80% 0%, hsla(168, 100%, 90%, 0.05) 0px, transparent 50%),
        radial-gradient(at 0% 50%, hsla(168, 100%, 90%, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
}

/* Logo Styles */
.logo {
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    padding: 0.5rem;
    position: relative;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 0.5rem;
}

.logo:hover {
    transform: translateY(-2px);
    background: white;
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.1);
}

.logo-text {
    font-family: 'Inter', sans-serif;
    font-weight: 800;
    font-size: 2.2rem;
    letter-spacing: -0.5px;
    line-height: 1.2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.logo-main {
    display: flex;
    align-items: center;
    gap: 0.1rem;
}

.logo-sub {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-top: -0.2rem;
    display: flex;
    gap: 0.1rem;
}

/* SEODAY letters */
.letter-s { color: var(--logo-blue); }
.letter-e { color: var(--logo-teal); }
.letter-o { color: var(--logo-cyan); }
.letter-d { color: var(--logo-mint); }
.letter-a { color: var(--logo-blue); }
.letter-y { color: var(--logo-teal); }

/* INCUBATOR letters */
.letter-i { color: var(--logo-blue); }
.letter-n { color: var(--logo-teal); }
.letter-c { color: var(--logo-cyan); }
.letter-u { color: var(--logo-mint); }
.letter-b { color: var(--logo-blue); }
.letter-a2 { color: var(--logo-teal); }
.letter-t { color: var(--logo-cyan); }
.letter-o2 { color: var(--logo-mint); }
.letter-r { color: var(--logo-blue); }

/* Letter animations */
.logo-main span,
.logo-sub span {
    display: inline-block;
    transition: transform 0.2s ease;
}

.logo:hover .letter-s { transform: translateY(-2px); }
.logo:hover .letter-e { transform: translateY(2px); }
.logo:hover .letter-o { transform: translateY(-2px); }
.logo:hover .letter-d { transform: translateY(2px); }
.logo:hover .letter-a { transform: translateY(-2px); }
.logo:hover .letter-y { transform: translateY(2px); }

.logo:hover .letter-i { transform: translateY(-1px); }
.logo:hover .letter-n { transform: translateY(1px); }
.logo:hover .letter-c { transform: translateY(-1px); }
.logo:hover .letter-u { transform: translateY(1px); }
.logo:hover .letter-b { transform: translateY(-1px); }
.logo:hover .letter-a2 { transform: translateY(1px); }
.logo:hover .letter-t { transform: translateY(-1px); }
.logo:hover .letter-o2 { transform: translateY(1px); }
.logo:hover .letter-r { transform: translateY(-1px); }

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Navigation */
.main-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.1), 0 2px 4px -1px rgba(13, 148, 136, 0.06);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.main-nav {
    padding: 1rem 0;
}

.main-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    white-space: nowrap;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--primary-dark);
    background: rgba(13, 148, 136, 0.1);
    transform: translateY(-1px);
}

/* Main Content */
main {
    margin-top: 72px;
    min-height: calc(100vh - 72px - 300px);
    padding: 2rem 0;
}

/* Footer */
.main-footer {
    background: var(--primary-dark);
    color: var(--text-white);
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 0 1rem;
}

.footer-content h3 {
    color: var(--text-white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-content p {
    color: var(--text-white-90);
    margin-bottom: 2rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--text-white-90);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--text-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-section a:hover {
    color: var(--primary-dark);
    transform: translateX(4px);
}

.footer-link {
    color: var(--text-white-90);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    padding: 0.25rem 0;
    position: relative;
}

.footer-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--text-white);
    transition: width 0.3s ease;
}

.footer-link:hover {
    color: var(--text-white);
    transform: translateX(4px);
}

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

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    color: var(--text-color);
    background: var(--card-background);
}

.newsletter-form button {
    padding: 0.5rem 1rem;
    background-color: var(--primary-dark);
    color: var(--text-white);
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.newsletter-form button:hover {
    background-color: var(--primary-color);
}

/* Modern Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    background: var(--card-background);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-dark);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.1);
}

/* Modern Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn:hover::before {
    transform: translateX(100%);
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.2);
    min-width: 200px;
    text-align: center;
    justify-content: center; /* Add this since .btn uses display: inline-flex */
    margin: 10px;
}

.btn-primary:hover {
    box-shadow: 0 6px 8px -1px rgba(13, 148, 136, 0.3);
}

.btn-secondary {
    background: var(--card-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .steps-grid,
    .benefits-grid,
    .models-grid,
    .target-groups-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .hero {
        padding: 4rem 0 3rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-cta,
    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-cta .btn,
    .cta-buttons .btn {
        width: 100%;
        text-align: center;
    }
    
    .steps-grid,
    .benefits-grid,
    .models-grid,
    .target-groups-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .model-card.featured {
        transform: none;
    }
    
    .model-card.featured:hover {
        transform: translateY(-5px);
    }
    
    section {
        padding: 3rem 0;
    }
    
    section h2 {
        font-size: 2rem;
    }
    
    .newsletter-form {
        flex-direction: column;
        gap: 1rem;
    }
    
    .newsletter-form input,
    .newsletter-form button {
        width: 100%;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    section h2 {
        font-size: 1.75rem;
    }
    
    .step,
    .benefit-card,
    .model-card,
    .target-group {
        padding: 1.5rem;
    }
    
    .model-percentage {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.95rem;
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .btn:hover::before {
        display: none;
    }
    
    .step:hover,
    .benefit-card:hover,
    .model-card:hover,
    .target-group:hover {
        transform: none;
    }
    
    .nav-links a:hover {
        transform: none;
    }
}

/* Print Styles */
@media print {
    .hero,
    .newsletter-section,
    .cta-section {
        background: none !important;
        color: var(--text-color) !important;
    }
    
    .btn {
        border: 1px solid var(--text-color);
        background: none !important;
        color: var(--text-color) !important;
    }
    
    .main-header,
    .main-footer {
        display: none;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }

/* Hero Section */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-white-90);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* How It Works Section */
.how-it-works {
    padding: 4rem 0;
    background: var(--light-background);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    padding: 2rem;
    background: var(--card-background);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.05);
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin: 0 auto 1rem;
}

.step h3 {
    color: var(--primary-dark);
}

.step p {
    color: var(--text-light);
}

/* Target Groups Section */
.target-groups {
    padding: 4rem 0;
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.group-card {
    padding: 2rem;
    background: var(--card-background);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.05);
    transition: transform 0.3s ease;
}

.group-card:hover {
    transform: translateY(-5px);
}

.group-card h3 {
    color: var(--primary-dark);
}

.group-card p {
    color: var(--text-light);
}

/* Participation Models Section */
.participation-models {
    padding: 4rem 0;
    background: var(--light-background);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.model-card {
    padding: 2rem;
    background: var(--card-background);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.05);
    transition: transform 0.3s ease;
}

.model-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--primary-color);
    background: linear-gradient(to bottom, var(--card-background), var(--light-background));
}

.model-card:hover {
    transform: translateY(-5px);
}

.model-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.model-card h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.model-card ul {
    list-style: none;
    margin: 1.5rem 0;
}

.model-card ul li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.model-card ul li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Success Stories Section */
.success-stories {
    padding: 4rem 0;
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.story-card {
    padding: 2rem;
    background: var(--card-background);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.05);
}

.story-card blockquote {
    font-style: italic;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.story-card cite {
    color: var(--primary-color);
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    padding: 4rem 0;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-white);
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-white-90);
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Section Headers */
section h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--headline-color);
    letter-spacing: -0.01em;
}

section h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

/* Typography */
h1 {
    color: var(--headline-color);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h2, h3, h4, h5, h6 {
    color: var(--text-color);
    font-weight: 700;
    line-height: 1.2;
}

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

/* Card Styles */
.step, .group-card, .model-card, .story-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.05);
}

.step h3, .group-card h3, .model-card h3 {
    color: var(--primary-dark);
}

.step p, .group-card p, .model-card p {
    color: var(--text-light);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-cta,
    .cta-buttons {
        flex-direction: column;
    }
    
    .model-card.featured {
        transform: none;
    }
    
    .model-card.featured:hover {
        transform: translateY(-5px);
    }
}

/* Benefits Section */
.benefits {
    padding: 4rem 0;
    background: var(--light-background);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.benefit-card {
    padding: 2rem;
    background: var(--card-background);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.05);
    transition: transform 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-5px);
}

.benefit-card h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.benefit-card p {
    color: var(--text-light);
}

/* Model Percentage */
.model-percentage {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 1rem 0;
}

.model-note {
    max-width: 800px;
    margin: 2rem auto;
    text-align: center;
    color: var(--text-light);
}

.model-note p {
    margin-bottom: 1rem;
}

/* Why SEODAY Section */
.why-seoday {
    padding: 4rem 0;
    background: var(--light-background);
}

.why-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

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

.why-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-light);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Newsletter Section */
.newsletter-section {
    padding: 4rem 0;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
}

.newsletter-section h2 {
    color: var(--text-white);
    margin-bottom: 1rem;
}

.newsletter-section p {
    color: var(--text-white-90);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    gap: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.newsletter-form input::placeholder {
    color: var(--text-white-90);
}

.newsletter-form input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
}

.newsletter-form button {
    padding: 0.75rem 1.5rem;
    background: var(--text-white);
    color: var(--primary-dark);
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
    }
    
    .benefits-grid,
    .models-grid,
    .groups-grid {
        grid-template-columns: 1fr;
    }
    
    .model-card.featured {
        transform: none;
    }
    
    .model-card.featured:hover {
        transform: translateY(-5px);
    }
}