/* Globals & Reset */
:root {
    --color-bg: #f8f9fa;
    --color-text: #2c3e50;
    --color-text-light: #5a6c7d;
    --color-border: #e2e8f0;
    
    /* Classic Theme Variables */
    --color-classic-primary: #34495e;
    --color-classic-accent: #eef2f5;
    --color-classic-btn: #3a506b;
    --color-classic-btn-hover: #1c2541;

    /* Modern Theme Variables */
    --color-modern-primary: #2d3748;
    --color-modern-accent: #fdfbf7;
    --color-modern-btn: #4299e1;
    --color-modern-btn-hover: #3182ce;
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-classic: 8px;
    --radius-modern: 24px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: 'Outfit', system-ui, -apple-system, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 500;
}

/* Header */
.site-header {
    text-align: center;
    padding: 6rem 2rem 4rem;
    max-width: 800px;
    margin: 0 auto;
}

.subtle-note {
    display: inline-block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    background: #eef2f5;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    margin-bottom: 2rem;
    font-weight: 600;
}

.headline {
    font-size: 2.75rem;
    margin-bottom: 1.5rem;
    color: #1a202c;
    letter-spacing: -0.02em;
}

.subline {
    font-size: 1.2rem;
    color: var(--color-text-light);
    font-weight: 300;
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.draft-notice {
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 1.5rem 2rem;
    text-align: left;
    font-size: 0.95rem;
    color: #475569;
    border-radius: 8px;
    margin: 0 auto;
    max-width: 750px;
    box-shadow: var(--shadow-sm);
}

.draft-notice p {
    margin: 0;
}

.draft-notice strong {
    color: #0f172a;
    font-weight: 600;
    font-size: 1.05rem;
}

/* Layout */
.concepts-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

/* Card General */
.concept-card {
    display: flex;
    flex-direction: column;
    background: #ffffff;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--color-border);
}

.concept-card:hover {
    transform: translateY(-8px);
}

.card-image-wrapper {
    width: 100%;
    height: 480px; /* Fixed height for image preview window */
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--color-border);
    background-color: #f1f5f9;
}

.concept-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    transition: transform 2s ease;
}

.concept-card:hover .concept-image {
    transform: scale(1.02);
}

.card-content {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: #1a202c;
}

.card-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.card-text {
    font-size: 1rem;
    margin-bottom: 2rem;
    color: var(--color-text-light);
}

.feature-list {
    list-style: none;
    margin-bottom: 3rem;
    flex-grow: 1;
}

.feature-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    color: var(--color-text);
}

.feature-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-text-light);
    font-size: 1.2rem;
    line-height: 1;
    top: -1px;
}

.button-wrapper {
    margin-top: auto;
}

.btn {
    display: inline-block;
    width: 100%;
    text-align: center;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

/* Card 1 - Classic Styling */
.card-classic {
    border-radius: var(--radius-classic);
    box-shadow: var(--shadow-sm);
}

.card-classic:hover {
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.card-classic .btn-classic {
    background-color: var(--color-classic-btn);
    color: #ffffff;
    border-radius: 4px;
}

.card-classic:hover .btn-classic {
    background-color: var(--color-classic-btn-hover);
}

/* Card 2 - Modern Styling */
.card-modern {
    border-radius: var(--radius-modern);
    box-shadow: var(--shadow-lg);
    border: none;
}

.card-modern:hover {
    box-shadow: 0 25px 35px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-modern .card-image-wrapper {
    background-color: var(--color-modern-accent);
    border-bottom: none;
}

.card-modern .btn-modern {
    background-color: #2b6cb0;
    color: #ffffff;
    border-radius: 50px;
}

.card-modern:hover .btn-modern {
    background-color: #1a365d;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 4rem 2rem 6rem;
    border-top: 1px solid var(--color-border);
    background-color: #ffffff;
}

.copyright-notice {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.copyright-notice span {
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.footer-logo {
    height: 35px;
    width: auto;
    opacity: 0.85;
    transition: var(--transition);
    display: block;
    margin-bottom: 0.5rem;
}

.footer-logo:hover {
    opacity: 1;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.footer-content strong {
    color: var(--color-text);
}

/* Responsive */
@media (max-width: 992px) {
    .concepts-container {
        grid-template-columns: 1fr;
        max-width: 700px;
    }
    
    .headline {
        font-size: 2.25rem;
    }
    
    .card-image-wrapper {
        height: 400px;
    }
}

@media (max-width: 600px) {
    .site-header {
        padding: 4rem 1.5rem 3rem;
    }
    
    .headline {
        font-size: 1.75rem;
    }
    
    .card-content {
        padding: 2rem 1.5rem;
    }
    
    .card-image-wrapper {
        height: 300px;
    }
}