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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --success-color: #10b981;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-color) 0%, #1a1f35 100%);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

body.light-theme {
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.theme-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: 50%;
    background: var(--surface-color);
}

.theme-toggle:hover {
    color: var(--primary-color);
    transform: rotate(20deg);
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 6rem 2rem;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% {
        filter: hue-rotate(0deg);
    }
    50% {
        filter: hue-rotate(20deg);
    }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.tag {
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    transition: var(--transition);
    cursor: pointer;
}

.tag:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
    border-color: var(--primary-color);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.3;
    animation: float 8s ease-in-out infinite;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: var(--primary-color);
    top: -150px;
    left: -150px;
    animation-delay: 0s;
}

.circle-2 {
    width: 250px;
    height: 250px;
    background: var(--secondary-color);
    bottom: -125px;
    right: -125px;
    animation-delay: 2s;
}

.circle-3 {
    width: 200px;
    height: 200px;
    background: var(--accent-color);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-50px, 50px) scale(0.9);
    }
}

/* Search Section */
.search-section {
    padding: 2rem;
    display: flex;
    justify-content: center;
}

.search-container {
    max-width: 600px;
    width: 100%;
    position: relative;
}

.search-container i {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

#searchInput {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Main Content */
.main-content {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.posts-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Post Card */
.post-card {
    background: var(--surface-color);
    border-radius: 20px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    animation: scaleIn 0.4s ease-out;
}

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.post-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.post-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.post-card:hover .post-image {
    transform: scale(1.1);
}

.post-content {
    padding: 1.5rem;
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.post-category {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.category-tech {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
}

.category-life {
    background: rgba(236, 72, 153, 0.2);
    color: var(--accent-color);
}

.category-travel {
    background: rgba(139, 92, 246, 0.2);
    color: var(--secondary-color);
}

.category-politics {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.category-games {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.post-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.post-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.post-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.post-stats {
    display: flex;
    gap: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--surface-color);
    border-radius: 20px;
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.4s ease-out;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    to {
        transform: translateY(50px) scale(0.95);
        opacity: 0;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    color: var(--text-color);
    cursor: pointer;
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border-radius: 50%;
    transition: var(--transition);
}

.close-modal:hover {
    transform: rotate(90deg);
    background: var(--primary-color);
}

.modal-header {
    position: relative;
    overflow: hidden;
}

.modal-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.modal-body {
    padding: 2rem;
    padding-bottom: 120px; /* Space for fixed buttons */
}

.modal-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.modal-category {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.modal-date {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.modal-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.modal-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Likes Section */
.likes-section {
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 2rem;
    background: var(--surface-color);
    border-top: 2px solid var(--border-color);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.2);
    margin-top: auto;
    border-radius: 0 0 20px 20px;
}

.like-btn {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    padding: 0.8rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-weight: 600;
}

.like-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: scale(1.05);
}

.like-btn.liked {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.like-btn.liked i {
    animation: heartBeat 0.5s ease-out;
}

@keyframes heartBeat {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.3);
    }
    50% {
        transform: scale(1.1);
    }
    75% {
        transform: scale(1.2);
    }
}

.comment-btn {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    padding: 0.8rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-weight: 600;
}

.comment-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.05);
}

/* Comments Section */
.comments-section {
    margin-top: 2rem;
    margin-bottom: 0;
}

.comments-section h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.comment-form input,
.comment-form textarea {
    padding: 0.8rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.comment-form textarea {
    min-height: 100px;
    resize: vertical;
}

.submit-comment {
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    align-self: flex-start;
}

.submit-comment:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.comment {
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.comment-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.comment-author {
    font-weight: 600;
    color: var(--primary-color);
}

.comment-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.comment-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--surface-color);
    padding: 3rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--bg-color);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-link:hover {
    transform: translateY(-5px);
    background: var(--primary-color);
    color: white;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .posts-container {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
    }

    .modal-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

    .modal-body {
        padding: 1rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.no-scroll {
    overflow: hidden;
}