:root {
    --bg-color: #FFFFFF;
    --text-color: #111111;
    --text-light: #555555;
    --border-color: #E0E0E0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    --hover-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    --primary-color: #000000;
    --accent-color: #F8F9FA;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

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

/* Header */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 32px;
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.logo-placeholder {
    width: 160px;
    height: 48px;
    border: 1px dashed #CCCCCC;
    background-color: #FDFDFD;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #AAAAAA;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--text-color);
}

/* About Section */
.about-section {
    padding: 100px 0 60px;
    text-align: center;
    background-color: var(--bg-color);
}

.about-section h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
    color: var(--text-color);
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    font-size: 20px;
    color: var(--text-light);
    line-height: 1.8;
    font-weight: 300;
}

/* News Feed Section */
.news-feed-section {
    padding: 40px 0 100px;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 40px;
}

.news-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
}

.news-thumbnail {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background-color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
}

.news-content {
    padding: 28px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.news-source {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.news-headline {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
    line-height: 1.35;
    letter-spacing: -0.5px;
}

.news-snippet {
    font-size: 15px;
    color: var(--text-light);
    flex-grow: 1;
    line-height: 1.6;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 48px 0;
    background-color: var(--bg-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.link-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.copyright {
    font-size: 14px;
    color: #888888;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.modal.show {
    display: block;
    opacity: 1;
}

.modal-content {
    background-color: var(--bg-color);
    margin: 8% auto;
    padding: 48px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 90%;
    max-width: 680px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    position: relative;
    transform: translateY(20px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.close {
    color: var(--text-light);
    position: absolute;
    top: 32px;
    right: 32px;
    font-size: 28px;
    line-height: 1;
    font-weight: 300;
    cursor: pointer;
    transition: var(--transition);
}

.close:hover,
.close:focus {
    color: var(--text-color);
    transform: scale(1.1);
}

.modal-content h2 {
    margin-bottom: 24px;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.modal-body {
    max-height: 55vh;
    overflow-y: auto;
    padding-right: 16px;
    color: var(--text-light);
    font-size: 16px;
    line-height: 1.7;
}

.modal-body h3 {
    margin: 24px 0 12px;
    color: var(--text-color);
    font-size: 18px;
    font-weight: 700;
}

.modal-body p {
    margin-bottom: 16px;
}

.modal-body ul {
    margin-bottom: 16px;
    padding-left: 24px;
}

.modal-body li {
    margin-bottom: 8px;
}

.modal-body .last-updated {
    font-size: 14px;
    color: #888888;
    margin-bottom: 24px;
}

.modal-body a {
    color: var(--text-color);
    text-decoration: underline;
}

.modal-body::-webkit-scrollbar {
    width: 8px;
}

.modal-body::-webkit-scrollbar-track {
    background: #F1F1F1;
    border-radius: 4px;
}

.modal-body::-webkit-scrollbar-thumb {
    background: #CCCCCC;
    border-radius: 4px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: #999999;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 16px 20px;
    }
    .about-section {
        padding: 80px 0 40px;
    }
    .about-section h1 {
        font-size: 40px;
    }
    .about-text {
        font-size: 18px;
    }
    .news-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .modal-content {
        margin: 15% auto;
        padding: 32px 24px;
    }
}