:root {
    /* Light mode */
    --bg-color: #fff;
    --bg-outer: #FF4F00;
    --text-primary: #111111;
    --text-secondary: #888888;
    --link-color: #0099FF;
    --link-nav-color: #0077FF;
    --red-color: #FF6666;
    --input-bg: #EBEBEB;
    --input-text: #616161;
    --border-color: transparent;
    --button-bg: #111111;
    --button-hover: #616161;
}

[data-theme="dark"] {
    /* Dark mode */
    --bg-color: #2A3441;
    --bg-outer: #151B23;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --link-color: #4FC3F7;
    --link-nav-color: #29B6F6;
    --red-color: #FF8A80;
    --input-bg: #1E252D;
    --input-text: #cccccc;
    --border-color: #3A4450;
    --button-bg: #4FC3F7;
    --button-hover: #29B6F6;
}

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

html{
    background-color: var(--bg-outer);
    padding: 20px;
    transition: background-color 0.3s ease;
}

body {
    font-family: 'SF Pro Display', 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    font-size: 20px;
    font-weight: 400;
    letter-spacing: -0.02em;
    border-radius: 10px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

header {
    padding: 20px 0;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: var(--link-nav-color);
    text-decoration: underline;
    font-size: 20px;
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--link-nav-color);
    text-decoration: underline;
    font-size: 20px;
    letter-spacing: -0.02em;
    cursor: pointer;
    font-family: 'SF Pro Display', 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: var(--link-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.text-content {
    max-width: 500px;
}

.text-content h1 {
    font-size: 50px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.03em;
    transition: color 0.3s ease;
}

.text-content p {
    margin-bottom: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    font-size: 20px;
    transition: color 0.3s ease;
}

.text-content p:last-child {
    margin-bottom: 0;
}

/* Links on index page only */
.text-content .link {
    color: var(--link-color);
    text-decoration: underline;
    transition: color 0.3s ease;
}

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

.image-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-image {
    width: 100%;
    max-width: 400px;
    overflow: hidden;
    margin-bottom: 16px;
}

.main-image img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 4/5;
    object-fit: cover;
}

.image-caption {
    margin-bottom: 8px;
}

.image-caption p {
    font-size: 20px;
    color: var(--text-secondary);
    text-align: left;
    margin: 0;
    transition: color 0.3s ease;
}

.email-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 400px;
    margin-top: 16px;
}

.email-input, .message-input {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'SF Pro Display', 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 20px;
    background-color: var(--input-bg);
    color: var(--input-text);
    resize: vertical;
    letter-spacing: -0.01em;
    transition: all 0.3s ease;
}

.email-input:focus, .message-input:focus {
    outline: none;
    border-color: var(--link-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.email-input::placeholder, .message-input::placeholder {
    color: var(--text-secondary);
}

.submit-btn {
    background-color: var(--button-bg);
    color: var(--bg-color);
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-family: 'SF Pro Display', 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 20px;
    font-weight: 500;
    cursor: pointer;
    letter-spacing: -0.01em;
    transition: all 0.3s ease;
}

[data-theme="dark"] .submit-btn {
    color: #151B23;
}

.submit-btn:hover {
    background-color: var(--button-hover);
}



/* Responsive Design */
@media (max-width: 768px) {    
    html{
        padding: 0px;
        background-color: unset;
    }

    body{
        border-radius: 0px;
    }

    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .text-content {
        max-width: 100%;
    }
    
    .text-content h1 {
        font-size: 40px;
    }
    
    nav {
        flex-wrap: wrap;
        gap: 6px;
    }
    
    .container {
        padding: 30px 20px;
    }
    
    .image-content {
        padding: 0;
    }
    
    .main-image {
        max-width: 90%;
        margin-bottom: 16px;
    }
    
    .email-form {
        max-width: 90%;
        margin-top: 16px;
    }
}

@media (max-width: 480px) {
    .text-content h1 {
        font-size: 32px;
    }
    
    .container {
        padding: 20px 15px;
    }
    
    .image-content {
        padding: 0 15px;
    }
    
    .main-image {
        max-width: 95%;
    }
    
    .email-form {
        max-width: 95%;
    }
    
    .text-content p {
        font-size: 18px;
    }
    
    .nav-link {
        font-size: 18px;
    }
    
    .email-input, .message-input {
        font-size: 18px;
    }
    
    .submit-btn {
        font-size: 18px;
    }
}

/* Content Page Styles */
.content-page {
    max-width: 600px;
}

.content-page h1 {
    font-size: 50px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.03em;
    transition: color 0.3s ease;
}

.content-page p {
    margin-bottom: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    font-size: 20px;
    transition: color 0.3s ease;
}

.red-text {
    color: var(--red-color);
    transition: color 0.3s ease;
}

/* Content page links default styling */
.content-page .link {
    color: var(--text-primary);
    text-decoration: underline;
    transition: color 0.3s ease;
}

.content-page .link:hover {
    color: var(--text-secondary);
}

/* Red links on content page */
.content-page .link.red-text {
    color: var(--red-color);
}

.content-page .link.red-text:hover {
    opacity: 0.8;
}

.content-list {
    margin-top: 12px;
    margin-bottom: 12px;
}

.content-item {
    margin-bottom: 8px;
}

.content-item:last-child {
    margin-bottom: 0;
}

.video-link {
    cursor: pointer;
    display: inline-block;
}

.video-container {
    margin-top: 16px;
}

.video-container iframe {
    width: 100%;
    max-width: 560px;
    height: 315px;
    border-radius: 8px;
}

.external-link {
    font-size: 20px;
    line-height: 1.6;
}

/* Responsive for content page */
@media (max-width: 768px) {
    .content-page h1 {
        font-size: 40px;
    }
    
    .video-container iframe {
        height: 240px;
    }
}

@media (max-width: 480px) {
    .content-page h1 {
        font-size: 32px;
    }
    
    .content-page p {
        font-size: 18px;
    }
    
    .video-container iframe {
        height: 200px;
    }
    
    .external-link {
        font-size: 18px;
    }
}