/* Office Tips Admin - Excel 2019 Soft Style */
:root {
    --primary: #217346;
    --primary-light: #4ea86e;
    --primary-dark: #185c37;
    --primary-soft: #e8f5ed;
    --sidebar-bg: #ffffff;
    --sidebar-text: #4a5a52;
    --sidebar-active: #217346;
    --sidebar-border: #e8ebe9;
    --content-bg: #f7f9f8;
    --card-bg: #ffffff;
    --text-primary: #2d3b35;
    --text-secondary: #6b7c73;
    --border: #e0e8e4;
    --success: #28a879;
    --warning: #f5a623;
    --danger: #e25c5c;
    --info: #5b8def;
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--content-bg);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Layout */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    border-right: 1px solid var(--sidebar-border);
    box-shadow: 2px 0 8px rgba(0,0,0,0.03);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
    color: #fff;
}

.sidebar-logo span {
    font-size: 1.1rem;
    font-weight: 600;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-section {
    padding: 0.5rem 1.5rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sidebar-text);
    opacity: 0.7;
    margin-top: 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--primary-soft);
    color: var(--sidebar-active);
}

.nav-item.active {
    background: var(--primary-soft);
    color: var(--sidebar-active);
    border-left-color: var(--primary);
    font-weight: 500;
}

.nav-icon {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 2rem;
}

/* Header */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-card-icon.primary { background: rgba(33, 115, 70, 0.1); color: var(--primary); }
.stat-card-icon.success { background: rgba(27, 197, 189, 0.1); color: var(--success); }
.stat-card-icon.warning { background: rgba(255, 168, 0, 0.1); color: var(--warning); }
.stat-card-icon.info { background: rgba(137, 80, 252, 0.1); color: var(--info); }

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-card-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    text-align: left;
    padding: 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: var(--content-bg);
    border-bottom: 1px solid var(--border);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

.table tr:hover {
    background: var(--content-bg);
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 6px;
}

.badge-primary { background: rgba(33, 115, 70, 0.1); color: var(--primary); }
.badge-success { background: rgba(27, 197, 189, 0.1); color: var(--success); }
.badge-warning { background: rgba(255, 168, 0, 0.1); color: var(--warning); }
.badge-info { background: rgba(137, 80, 252, 0.1); color: var(--info); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-light {
    background: var(--content-bg);
    color: var(--text-primary);
}

.btn-light:hover {
    background: var(--border);
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Search */
.search-box {
    position: relative;
    max-width: 300px;
}

.search-box input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.875rem;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-box::before {
    content: "🔍";
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.875rem;
}

/* Article List */
.article-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.article-item:hover {
    background: var(--content-bg);
}

.article-item:last-child {
    border-bottom: none;
}

.article-icon {
    width: 40px;
    height: 40px;
    background: var(--content-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.article-info {
    flex: 1;
}

.article-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.article-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

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

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #e8f5e9;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 304 304' width='304' height='304'%3E%3Cpath fill='%23217346' fill-opacity='0.15' d='M44.1 224a5 5 0 1 1 0 2H0v-2h44.1zm160 48a5 5 0 1 1 0 2H82v-2h122.1zm57.8-46a5 5 0 1 1 0-2H304v2h-42.1zm0 16a5 5 0 1 1 0-2H304v2h-42.1zm6.2-114a5 5 0 1 1 0 2h-86.2a5 5 0 1 1 0-2h86.2zm-256-48a5 5 0 1 1 0 2H0v-2h12.1zm185.8 34a5 5 0 1 1 0-2h86.2a5 5 0 1 1 0 2h-86.2zM258 12.1a5 5 0 1 1-2 0V0h2v12.1zm-64 208a5 5 0 1 1-2 0v-54.2a5 5 0 1 1 2 0v54.2zm48-198.2V80h62v2h-64V21.9a5 5 0 1 1 2 0zm16 16V64h46v2h-48V37.9a5 5 0 1 1 2 0zm-128 96V208h16v12.1a5 5 0 1 1-2 0V210h-16v-76.1a5 5 0 1 1 2 0zm-5.9-21.9a5 5 0 1 1 0 2H114v48H85.9a5 5 0 1 1 0-2H112v-48h12.1zm-6.2 130a5 5 0 1 1 0-2H176v-74.1a5 5 0 1 1 2 0V242h-60.1zm-16-64a5 5 0 1 1 0-2H114v48h10.1a5 5 0 1 1 0 2H112v-48h-10.1zM66 284.1a5 5 0 1 1-2 0V274H50v30h-2v-32h18v12.1zM236.1 176a5 5 0 1 1 0 2H226v94h48v32h-2v-30h-48v-98h12.1zm25.8-30a5 5 0 1 1 0-2H274v44.1a5 5 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0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM17 180a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM17 84a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32 64a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6z'%3E%3C/path%3E%3C/svg%3E");
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(33, 115, 70, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.login-page::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(26, 92, 56, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    bottom: -80px;
    left: -80px;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.login-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(33, 115, 70, 0.3);
    position: relative;
    z-index: 10;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    width: 60px;
    height: 60px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: bold;
    color: #fff;
    margin: 0 auto 1rem;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.login-btn {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
}

/* Alert */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-danger {
    background: rgba(246, 78, 96, 0.1);
    color: var(--danger);
    border: 1px solid rgba(246, 78, 96, 0.2);
}

.alert-success {
    background: rgba(27, 197, 189, 0.1);
    color: var(--success);
    border: 1px solid rgba(27, 197, 189, 0.2);
}

/* Editor */
.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    min-height: 500px;
}

.editor-panel {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
}

.editor-panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.editor-textarea {
    flex: 1;
    width: 100%;
    padding: 1rem;
    border: none;
    resize: none;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    background: #fafbfa;
}

.editor-textarea:focus {
    outline: none;
}

.editor-preview {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    background: #fff;
}

.editor-preview h1 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--primary); }
.editor-preview h2 { font-size: 1.25rem; margin: 1.5rem 0 0.75rem; color: var(--text-primary); }
.editor-preview p { margin-bottom: 1rem; line-height: 1.7; }
.editor-preview ul, .editor-preview ol { margin: 1rem 0; padding-left: 1.5rem; }
.editor-preview li { margin-bottom: 0.5rem; }
.editor-preview code { background: var(--primary-soft); padding: 0.2rem 0.4rem; border-radius: 4px; font-size: 0.9em; }
.editor-preview pre { background: #2d3b35; color: #e8f5ed; padding: 1rem; border-radius: 8px; overflow-x: auto; margin: 1rem 0; }
.editor-preview pre code { background: transparent; padding: 0; }

.editor-toolbar {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--content-bg);
}

.editor-toolbar button {
    padding: 0.4rem 0.6rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
}

.editor-toolbar button:hover {
    background: var(--primary-soft);
    border-color: var(--primary);
}

select.form-control {
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 1000;
        transition: transform 0.3s;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

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