:root {
    --bg-main: #0d1117;
    --bg-card: #161b22;
    --bg-nav: #161b22;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border: #30363d;
    --shadow: rgba(0, 0, 0, 0.4);
    --success: #3fb950;
    --error: #f85149;
    --warning: #d29922;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(22, 27, 34, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--accent);
}

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.2s ease;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

main {
    flex: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    width: 100%;
}

.hero {
    text-align: center;
    padding: 3rem 1rem;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.hero .accent-line {
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: 1.5rem auto 0;
    border-radius: 2px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.section-header .view-all {
    font-size: 0.9rem;
    font-weight: 500;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--shadow);
    border-color: var(--accent);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--border);
}

.project-content {
    padding: 1.5rem;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.project-title a {
    color: inherit;
    text-decoration: none;
}

.project-title a:hover {
    color: var(--accent);
}

.project-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-full-content {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    line-height: 1.8;
}

.project-full-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 1rem 0;
}

.project-full-content video {
    max-width: 100%;
    border-radius: 8px;
    margin: 1rem 0;
}

.project-full-content iframe {
    max-width: 100%;
    border-radius: 8px;
    margin: 1rem 0;
}

.project-full-content p {
    margin-bottom: 1rem;
}

.project-full-content h1,
.project-full-content h2,
.project-full-content h3 {
    margin: 1.5rem 0 0.75rem;
    color: var(--text-primary);
}

.project-full-content ul,
.project-full-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.project-full-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.project-full-content code {
    background: var(--bg-main);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.project-full-content pre {
    background: var(--bg-main);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

.project-full-content pre code {
    background: none;
    padding: 0;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 0.95rem;
}

footer {
    background: var(--bg-nav);
    border-top: 1px solid var(--border);
    padding: 2rem 1.5rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

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

.social-links a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.social-links a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-main);
    transform: translateY(-2px);
}

footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.admin-body {
    background: var(--bg-main);
    min-height: 100vh;
}

.admin-header {
    background: var(--bg-nav);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-header .nav-container {
    max-width: 900px;
}

.admin-main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.admin-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.admin-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-section h2::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--accent);
    border-radius: 2px;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-main);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--border);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-sm {
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
}

.status-message {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: none;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
}

.status-message.show {
    display: flex;
}

.status-success {
    background: rgba(63, 185, 80, 0.15);
    border: 1px solid var(--success);
    color: var(--success);
}

.status-error {
    background: rgba(248, 81, 73, 0.15);
    border: 1px solid var(--error);
    color: var(--error);
}

.status-info {
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.status-warning {
    background: rgba(210, 153, 34, 0.15);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.tox-tinymce {
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
    background: var(--bg-main) !important;
}

.tox .toolbar {
    background: var(--bg-nav) !important;
    border-bottom: 1px solid var(--border) !important;
}

.tox .toolbar button {
    color: var(--text-primary) !important;
}

.tox .toolbar button:hover {
    background: var(--border) !important;
}

.tox .toolbar button:focus {
    box-shadow: 0 0 0 2px var(--accent) !important;
}

.tox .tox-edit-area__iframe {
    background: var(--bg-main) !important;
}

.tox-statusbar {
    background: var(--bg-nav) !important;
    border-top: 1px solid var(--border) !important;
}

.tox-statusbar a,
.tox-statusbar span {
    color: var(--text-secondary) !important;
}

.tox .tox-dialog {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
}

.tox .tox-dialog__header {
    background: var(--bg-nav) !important;
    border-bottom: 1px solid var(--border) !important;
}

.tox .tox-dialog__body {
    background: var(--bg-card) !important;
}

.tox .tox-dialog__footer {
    background: var(--bg-nav) !important;
    border-top: 1px solid var(--border) !important;
}

.tox .tox-textfield,
.tox .tox-listboxfield select {
    background: var(--bg-main) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-primary) !important;
}

.tox .tox-button--primary {
    background: var(--accent) !important;
    color: var(--bg-main) !important;
    border: none !important;
}

.tox .tox-button--primary:hover {
    background: var(--accent-hover) !important;
}

.tox .tox-menu {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
}

.tox .tox-collection__item {
    color: var(--text-primary) !important;
}

.tox .tox-collection__item:hover {
    background: var(--border) !important;
}

.login-form {
    max-width: 450px;
    margin: 0 auto;
}

.login-form .form-group {
    margin-bottom: 1rem;
}

.login-form .btn {
    width: 100%;
    margin-top: 0.5rem;
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.project-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color 0.2s ease;
}

.project-list-item:hover {
    border-color: var(--accent);
}

.project-list-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.project-list-info .project-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.project-list-actions {
    display: flex;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-nav);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
        display: none;
        gap: 0.5rem;
    }

    .nav-links.open {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .admin-section {
        padding: 1.5rem;
    }

    .project-list-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .project-list-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

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

    main,
    .admin-main {
        padding: 1.5rem 1rem;
    }

    .admin-section {
        padding: 1.25rem;
    }
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Project Detail Page */
.project-detail {
    max-width: 800px;
    margin: 0 auto;
}

.project-detail-header {
    margin-bottom: 2rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1rem;
    transition: color 0.2s ease;
}

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

.project-detail-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-detail-date {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.project-detail-content {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.project-detail-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.project-detail-content video {
    max-width: 100%;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.project-detail-content iframe {
    max-width: 100%;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.project-detail-content p {
    margin-bottom: 1.25rem;
}

.project-detail-content h1,
.project-detail-content h2,
.project-detail-content h3 {
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.project-detail-content ul,
.project-detail-content ol {
    margin: 1.25rem 0;
    padding-left: 1.5rem;
}

.project-detail-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1.25rem;
    margin: 1.5rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.project-detail-content code {
    background: var(--bg-main);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.project-detail-content pre {
    background: var(--bg-main);
    padding: 1.25rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
    border: 1px solid var(--border);
}

.project-detail-content pre code {
    background: none;
    padding: 0;
}