/* =====================================================
   LICENSE MANAGER - MODERN RESPONSIVE STYLESHEET
   ===================================================== */

:root {
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --secondary: #764ba2;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --dark: #343a40;
    --light: #f8f9fa;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --topbar-height: 65px;
    --border-radius: 12px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

/* =====================================================
   SIDEBAR
   ===================================================== */

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
}

.logo i {
    font-size: 24px;
}

.sidebar.collapsed .logo span,
.sidebar.collapsed .sidebar-menu span,
.sidebar.collapsed .sidebar-footer span {
    display: none;
}

.sidebar-toggle {
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    width: 35px;
    height: 35px;
    border-radius: 8px;
    cursor: pointer;
    display: none;
}

.sidebar-menu {
    list-style: none;
    padding: 15px 0;
    flex: 1;
    overflow-y: auto;
}

.sidebar-menu li {
    margin: 4px 12px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    transition: var(--transition);
    font-weight: 500;
}

.sidebar-menu a:hover,
.sidebar-menu li.active a {
    background: rgba(255,255,255,0.15);
}

.sidebar-menu i {
    width: 20px;
    text-align: center;
    font-size: 18px;
}

.sidebar-footer {
    padding: 15px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    transition: var(--transition);
    opacity: 0.8;
}

.sidebar-footer a:hover {
    background: rgba(255,255,255,0.1);
    opacity: 1;
}

/* =====================================================
   MAIN CONTENT
   ===================================================== */

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: var(--transition);
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed);
}

/* =====================================================
   TOPBAR
   ===================================================== */

.topbar {
    position: sticky;
    top: 0;
    height: var(--topbar-height);
    background: var(--white);
    display: flex;
    align-items: center;
    padding: 0 25px;
    gap: 20px;
    box-shadow: var(--shadow);
    z-index: 100;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--gray-700);
    cursor: pointer;
    padding: 8px;
}

.search-box {
    flex: 1;
    max-width: 400px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
}

.search-box input {
    width: 100%;
    padding: 10px 15px 10px 45px;
    border: 2px solid var(--gray-200);
    border-radius: 25px;
    font-size: 14px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.notifications {
    position: relative;
    cursor: pointer;
    font-size: 20px;
    color: var(--gray-600);
}

.notifications .badge {
    position: absolute;
    top: -5px;
    right: -8px;
    background: var(--danger);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.user-menu img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.user-menu span {
    font-weight: 500;
    color: var(--gray-700);
}

/* =====================================================
   CONTENT
   ===================================================== */

.content {
    padding: 25px;
}

.page-header {
    margin-bottom: 25px;
}

.page-header h1 {
    font-size: 28px;
    color: var(--gray-800);
    margin-bottom: 5px;
}

.page-header p {
    color: var(--gray-600);
}

/* =====================================================
   STATS CARDS
   ===================================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-card.primary .stat-icon { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.stat-card.success .stat-icon { background: linear-gradient(135deg, #28a745, #20c997); }
.stat-card.warning .stat-icon { background: linear-gradient(135deg, #ffc107, #fd7e14); }
.stat-card.danger .stat-icon { background: linear-gradient(135deg, #dc3545, #e83e8c); }

.stat-info h3 {
    font-size: 28px;
    color: var(--gray-800);
    margin-bottom: 5px;
}

.stat-info p {
    color: var(--gray-600);
    font-size: 14px;
}

/* =====================================================
   QUICK ACTIONS
   ===================================================== */

.quick-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.action-btn.warning {
    background: var(--warning);
    color: var(--gray-800);
}

.action-btn.secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* =====================================================
   CARDS
   ===================================================== */

.card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    overflow: hidden;
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 18px;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 25px;
}

.btn-link {
    color: var(--primary);
    font-weight: 500;
    font-size: 14px;
}

.btn-link:hover {
    text-decoration: underline;
}

/* =====================================================
   DASHBOARD GRID
   ===================================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 25px;
}

/* =====================================================
   TABLE
   ===================================================== */

.table-responsive {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-100);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    color: var(--gray-700);
    font-size: 14px;
}

.table tbody tr:hover {
    background: var(--gray-50);
}

code {
    background: var(--gray-100);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    color: var(--primary);
}

/* =====================================================
   BADGES
   ===================================================== */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-active { background: #d4edda; color: #155724; }
.badge-expired { background: #f8d7da; color: #721c24; }
.badge-revoked { background: #d6d8db; color: #383d41; }
.badge-warning { background: #fff3cd; color: #856404; }

/* =====================================================
   EMPTY STATE
   ===================================================== */

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 15px;
}

/* =====================================================
   EXPIRING LIST
   ===================================================== */

.expiring-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.expiring-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    background: var(--gray-100);
    border-radius: 10px;
}

.expiring-info strong {
    display: block;
    color: var(--gray-800);
    margin-bottom: 3px;
}

.expiring-info small {
    color: var(--gray-500);
    font-size: 12px;
}

.expiring-days {
    background: var(--warning);
    color: var(--gray-800);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.expiring-days.critical {
    background: var(--danger);
    color: white;
}

/* =====================================================
   MONTHLY STATS
   ===================================================== */

.monthly-stats {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.monthly-stat {
    padding: 20px;
}

.monthly-value {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.monthly-label {
    color: var(--gray-600);
    font-size: 14px;
}

/* =====================================================
   FORMS
   ===================================================== */

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    font-size: 14px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-control::placeholder {
    color: var(--gray-400);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236c757d' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

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

/* =====================================================
   BUTTONS
   ===================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-warning { background: var(--warning); color: var(--gray-800); }
.btn-secondary { background: var(--gray-200); color: var(--gray-700); }

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* =====================================================
   UTILITIES
   ===================================================== */

.text-center { text-align: center; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* =====================================================
   LOGIN PAGE
   ===================================================== */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 420px;
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header .logo-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.login-header .logo-icon i {
    font-size: 32px;
    color: white;
}

.login-header h1 {
    font-size: 24px;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--gray-500);
}

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar.collapsed {
        transform: translateX(-100%);
    }
    
    .main-content,
    .main-content.expanded {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .topbar {
        padding: 0 15px;
    }
    
    .search-box {
        display: none;
    }
    
    .user-menu span {
        display: none;
    }
    
    .content {
        padding: 15px;
    }
    
    .page-header h1 {
        font-size: 22px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .stat-card {
        padding: 15px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .stat-info h3 {
        font-size: 24px;
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .action-btn {
        justify-content: center;
    }
    
    .monthly-stats {
        flex-direction: column;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .login-box {
        padding: 25px;
    }
}

/* =====================================================
   GENERATE PAGE SPECIFIC
   ===================================================== */

.generate-form {
    max-width: 600px;
}

.result-box {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--border-radius);
    padding: 30px;
    color: white;
    text-align: center;
    margin-bottom: 25px;
}

.result-box .license-key {
    font-family: 'Courier New', monospace;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 3px;
    margin: 15px 0;
    padding: 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
}

.result-box .copy-btn {
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.result-box .copy-btn:hover {
    background: rgba(255,255,255,0.3);
}

.output-section {
    background: #1e1e1e;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 20px;
}

.output-header {
    background: #2d2d2d;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.output-header h4 {
    color: #4ec9b0;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.output-body {
    padding: 20px;
}

.output-body pre {
    color: #d4d4d4;
    font-size: 13px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
}