/**
 * Docker Image Downloader - Velzon Inspired Dashboard
 * Modern, Professional Dashboard with Dark/Light Mode Support
 */

/* ========================================
   CSS Variables - Theme System
   ======================================== */

:root {
    /* Light Mode Colors */
    --primary-color: #405189;
    --secondary-color: #3577f1;
    --success-color: #0ab39c;
    --danger-color: #f06548;
    --warning-color: #f7b84b;
    --info-color: #299cdb;

    /* Background Colors */
    --body-bg: #f3f6f9;
    --card-bg: #ffffff;
    --sidebar-bg: #ffffff;
    --header-bg: #ffffff;

    /* Text Colors */
    --text-primary: #212529;
    --text-secondary: #878a99;
    --text-muted: #878a99;

    /* Border Colors */
    --border-color: #e9ebec;
    --border-light: #f3f6f9;

    /* Shadow */
    --box-shadow: 0 1px 2px rgba(56, 65, 74, 0.15);
    --box-shadow-lg: 0 0.75rem 1.5rem rgba(18, 38, 63, 0.15);

    /* Sidebar */
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 70px;

    /* Topbar */
    --topbar-height: 70px;

    /* Fonts */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 0.9375rem;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-color: #556ee6;
    --secondary-color: #4a90e2;

    --body-bg: #0d1117;
    --card-bg: #161b22;
    --sidebar-bg: #161b22;
    --header-bg: #161b22;

    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #8b949e;

    --border-color: #30363d;
    --border-light: #21262d;

    --box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    --box-shadow-lg: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.4);
}

/* ========================================
   Base Styles
   ======================================== */

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background-color: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease;
}

/* ========================================
   Layout Structure
   ======================================== */

.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    overflow-y: auto;
    transition: all 0.3s ease;
    z-index: 1000;
}

.sidebar-brand {
    padding: 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand-icon {
    font-size: 2rem;
}

.sidebar-brand-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-menu {
    padding: 1.5rem 0;
}

.menu-title {
    padding: 0.5rem 1.5rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    gap: 12px;
    cursor: pointer;
}

.menu-item:hover {
    background-color: var(--border-light);
    color: var(--text-primary);
}

.menu-item.active {
    background-color: rgba(64, 81, 137, 0.1);
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.menu-item-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 999;
}

.topbar-start {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.topbar-end {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background-color: var(--border-light);
    border-color: var(--text-secondary);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: 1.5rem;
}

/* ========================================
   Dashboard Grid
   ======================================== */

.dashboard-header {
    margin-bottom: 1.5rem;
}

.dashboard-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.dashboard-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Stats Cards Row */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.stat-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.stat-card-info {
    flex: 1;
}

.stat-card-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-weight: 500;
}

.stat-card-value {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-card-icon.primary {
    background: rgba(64, 81, 137, 0.1);
    color: var(--primary-color);
}

.stat-card-icon.success {
    background: rgba(10, 179, 156, 0.1);
    color: var(--success-color);
}

.stat-card-icon.info {
    background: rgba(41, 156, 219, 0.1);
    color: var(--info-color);
}

.stat-card-icon.warning {
    background: rgba(247, 184, 75, 0.1);
    color: var(--warning-color);
}

.stat-card-trend {
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.stat-card-trend.up {
    color: var(--success-color);
}

.stat-card-trend.down {
    color: var(--danger-color);
}

/* ========================================
   Cards
   ======================================== */

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

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

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

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

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--border-light);
    border-top: 1px solid var(--border-color);
}

/* ========================================
   Forms
   ======================================== */

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

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

.form-control {
    width: 100%;
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: var(--text-primary);
    background-color: var(--card-bg);
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(64, 81, 137, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.form-select {
    width: 100%;
    padding: 0.625rem 2.25rem 0.625rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23878a99' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-select:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(64, 81, 137, 0.25);
}

.form-text {
    margin-top: 0.25rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-block;
    font-weight: 500;
    line-height: 1.5;
    color: #fff;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    border-radius: 6px;
    transition: all 0.15s ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background-color: #364574;
    border-color: #364574;
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    background-color: #099885;
    border-color: #099885;
}

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-danger:hover {
    background-color: #e84a2e;
    border-color: #e84a2e;
}

.btn-secondary {
    background-color: var(--text-secondary);
    border-color: var(--text-secondary);
    color: #fff;
}

.btn-secondary:hover {
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: transparent;
}

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ========================================
   Tables
   ======================================== */

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    margin-bottom: 0;
    color: var(--text-primary);
    border-collapse: collapse;
}

.table thead th {
    padding: 0.75rem 1rem;
    background-color: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    text-align: left;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: var(--border-light);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ========================================
   Badges
   ======================================== */

.badge {
    display: inline-block;
    padding: 0.35em 0.65em;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 4px;
}

.badge-primary {
    background-color: var(--primary-color);
}

.badge-success {
    background-color: var(--success-color);
}

.badge-danger {
    background-color: var(--danger-color);
}

.badge-warning {
    background-color: var(--warning-color);
}

.badge-info {
    background-color: var(--info-color);
}

.badge-secondary {
    background-color: var(--text-secondary);
}

.badge-soft-primary {
    background-color: rgba(64, 81, 137, 0.1);
    color: var(--primary-color);
}

.badge-soft-success {
    background-color: rgba(10, 179, 156, 0.1);
    color: var(--success-color);
}

.badge-soft-danger {
    background-color: rgba(240, 101, 72, 0.1);
    color: var(--danger-color);
}

.badge-soft-warning {
    background-color: rgba(247, 184, 75, 0.1);
    color: var(--warning-color);
}

/* ========================================
   Alerts
   ======================================== */

.alert {
    position: relative;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-icon {
    font-size: 1.25rem;
}

.alert-content {
    flex: 1;
}

.alert-success {
    color: #0a7c6a;
    background-color: rgba(10, 179, 156, 0.1);
    border-color: rgba(10, 179, 156, 0.2);
}

.alert-danger {
    color: #c73a1f;
    background-color: rgba(240, 101, 72, 0.1);
    border-color: rgba(240, 101, 72, 0.2);
}

.alert-warning {
    color: #996618;
    background-color: rgba(247, 184, 75, 0.1);
    border-color: rgba(247, 184, 75, 0.2);
}

.alert-info {
    color: #1f7faf;
    background-color: rgba(41, 156, 219, 0.1);
    border-color: rgba(41, 156, 219, 0.2);
}

/* ========================================
   Progress Bar
   ======================================== */

.progress-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--box-shadow);
    display: none;
}

.progress-card.active {
    display: block;
}

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

.progress-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.progress-percentage {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.progress-wrapper {
    position: relative;
    height: 10px;
    background-color: var(--border-light);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar-animated::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.progress-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.progress-stage {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.progress-stage.init {
    background-color: rgba(41, 156, 219, 0.1);
    color: var(--info-color);
}

.progress-stage.download {
    background-color: rgba(10, 179, 156, 0.1);
    color: var(--success-color);
}

.progress-stage.tar {
    background-color: rgba(247, 184, 75, 0.1);
    color: var(--warning-color);
}

/* ========================================
   Empty State
   ======================================== */

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========================================
   Utilities
   ======================================== */

.d-flex {
    display: flex !important;
}

.align-items-center {
    align-items: center !important;
}

.justify-content-between {
    justify-content: space-between !important;
}

.gap-2 {
    gap: 0.5rem !important;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.mt-3 {
    margin-top: 1rem !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

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

    .topbar {
        padding: 0 1rem;
    }

    .page-content {
        padding: 1rem;
    }
}

/* ========================================
   Login Modal & Authentication
   ======================================== */

.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.auth-overlay.hidden {
    display: none;
}

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

.login-modal {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    padding: 0;
    animation: slideUp 0.3s ease;
    overflow: hidden;
}

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

.login-modal-header {
    padding: 2rem 2rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.login-modal-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.login-modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.login-modal-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.login-modal-body {
    padding: 2rem;
}

.login-form-group {
    margin-bottom: 1.5rem;
}

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

.login-form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--body-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease-in-out;
}

.login-form-control:focus {
    color: var(--text-primary);
    background-color: var(--body-bg);
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(64, 81, 137, 0.15);
}

.login-btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(64, 81, 137, 0.3);
}

.login-btn:active {
    transform: translateY(0);
}

.login-error {
    background-color: rgba(240, 101, 72, 0.1);
    border: 1px solid rgba(240, 101, 72, 0.2);
    color: var(--danger-color);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.login-error-icon {
    font-size: 1.25rem;
}

.content-blurred {
    filter: blur(8px);
    pointer-events: none;
    user-select: none;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--border-light);
    border-radius: 8px;
    margin-right: 0.5rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: #fff;
    font-weight: 600;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.btn-logout {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: #fff;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-logout:hover {
    background-color: #e84a2e;
    border-color: #e84a2e;
}

/* ========================================
   Custom Scrollbar (Webkit)
   ======================================== */

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

::-webkit-scrollbar-track {
    background: var(--border-light);
}

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

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