/* ===== CSS Custom Properties ===== */
:root {
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #e0e7ff;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-bg: #f1f5f9;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-border: #e2e8f0;
    --color-table-header: #f8fafc;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --transition: 150ms ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Navigation ===== */
nav {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    height: 56px;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-brand {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    margin-right: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.3px;
    white-space: nowrap;
}

.nav-brand svg {
    flex-shrink: 0;
}

nav a {
    color: #94a3b8;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background-color var(--transition);
}

nav a:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.08);
}

nav a.active {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.12);
}

/* ===== Page Layout ===== */
.page-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.page-header p {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

/* ===== Cards / Containers ===== */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

/* Legacy .container support */
.container {
    max-width: 1200px;
    margin: 24px auto;
    padding: 24px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

/* ===== Stats Row ===== */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.primary { background-color: var(--color-primary-light); color: var(--color-primary); }
.stat-icon.success { background-color: var(--color-success-light); color: var(--color-success); }
.stat-icon.warning { background-color: var(--color-warning-light); color: var(--color-warning); }

.stat-info { flex: 1; }

.stat-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    margin-top: 2px;
}

/* ===== Filter Bar ===== */
.filters {
    background-color: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 16px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 160px;
}

.filters label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filters select,
.filters input[type="datetime-local"],
.filters input[type="text"],
.filters input[type="number"] {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
}

.filters select:focus,
.filters input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.filters select[multiple] {
    min-height: 80px;
}

/* ===== Buttons ===== */
button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-sans);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition), box-shadow var(--transition), transform var(--transition);
    white-space: nowrap;
}

button:active {
    transform: scale(0.98);
}

.btn-primary, button[type="submit"], #updateBtn, #saveTargetsBtn {
    background-color: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover, button[type="submit"]:hover, #updateBtn:hover, #saveTargetsBtn:hover {
    background-color: var(--color-primary-hover);
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.25);
}

.btn-secondary {
    background-color: #f1f5f9;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: #e2e8f0;
}

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

.btn-danger:hover {
    background-color: var(--color-danger-hover);
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.25);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 13px;
}

.btn-icon {
    padding: 6px;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-icon:hover {
    background-color: #f1f5f9;
    color: var(--color-text);
}

/* ===== Tables ===== */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 0;
    font-size: 14px;
}

.table-wrapper {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

table th {
    background-color: var(--color-table-header);
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

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

table tbody tr {
    transition: background-color var(--transition);
}

table tbody tr:hover {
    background-color: #f8fafc;
}

.table-empty {
    text-align: center;
    padding: 40px 16px !important;
    color: var(--color-text-secondary);
}

.table-empty-icon {
    font-size: 32px;
    margin-bottom: 8px;
    opacity: 0.4;
}

/* ===== Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 9999px;
    line-height: 1.5;
}

.badge-success {
    background-color: var(--color-success-light);
    color: #065f46;
}

.badge-warning {
    background-color: var(--color-warning-light);
    color: #92400e;
}

.badge-primary {
    background-color: var(--color-primary-light);
    color: #3730a3;
}

/* ===== Forms ===== */
.form-card {
    background-color: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
}

.form-card h2 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group input::placeholder {
    color: #94a3b8;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 150ms ease;
}

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

@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-content {
    background-color: var(--color-surface);
    margin: 80px auto;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 200ms ease;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.modal-body {
    padding: 20px 24px;
    max-height: 400px;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-table-header);
}

.close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition), color var(--transition);
    line-height: 1;
}

.close:hover {
    background-color: #f1f5f9;
    color: var(--color-text);
}

/* Target list in modal */
#targetList {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

#targetList div {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition);
    margin-bottom: 0;
}

#targetList div:hover {
    background-color: #f8fafc;
}

#targetList input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}

#targetList label {
    font-size: 14px;
    cursor: pointer;
    color: var(--color-text);
}

/* ===== Chart Container ===== */
.chart-container {
    position: relative;
    width: 100%;
    min-height: 350px;
}

.chart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--color-text-secondary);
    text-align: center;
    gap: 8px;
}

.chart-empty svg {
    opacity: 0.3;
    margin-bottom: 8px;
}

.chart-empty p {
    font-size: 14px;
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    animation: toastIn 250ms ease;
    max-width: 360px;
}

.toast-success { background-color: #059669; }
.toast-error { background-color: var(--color-danger); }
.toast-info { background-color: var(--color-primary); }

@keyframes toastIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(12px); }
}

.toast.removing {
    animation: toastOut 200ms ease forwards;
}

/* ===== Loading ===== */
.loading-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 600ms linear infinite;
}

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

.loading-row td {
    text-align: center;
    padding: 32px 16px !important;
    color: var(--color-text-secondary);
}

/* ===== Confirm Dialog ===== */
.confirm-overlay {
    position: fixed;
    z-index: 150;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 150ms ease;
}

.confirm-dialog {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 24px;
    width: 90%;
    max-width: 400px;
    animation: slideUp 200ms ease;
}

.confirm-dialog h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.confirm-dialog p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.confirm-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ===== Mono Text ===== */
.mono {
    font-family: var(--font-mono);
    font-size: 13px;
}

/* ===== Login Page ===== */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #1e293b 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 24px;
}

.login-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 32px;
    animation: slideUp 300ms ease;
}

.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.login-brand svg {
    color: var(--color-primary);
}

.login-header p {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.login-form-group {
    margin-bottom: 18px;
}

.login-form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.login-form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.login-form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.login-form-group input::placeholder {
    color: #94a3b8;
}

.login-error {
    display: none;
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
    font-size: 13px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
}

.login-btn {
    width: 100%;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 600;
    background-color: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition), box-shadow var(--transition);
}

.login-btn:hover {
    background-color: var(--color-primary-hover);
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.25);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* ===== Nav Logout ===== */
.nav-spacer {
    flex: 1;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.nav-username {
    color: #94a3b8;
    font-size: 13px;
    font-weight: 500;
}

.nav-logout {
    color: #94a3b8;
    background: none;
    border: 1px solid rgba(148, 163, 184, 0.3);
    padding: 5px 12px;
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}

.nav-logout:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    nav {
        padding: 0 16px;
        gap: 4px;
    }

    .nav-brand {
        margin-right: 12px;
        font-size: 14px;
    }

    nav a {
        padding: 6px 10px;
        font-size: 13px;
    }

    .page-wrapper {
        padding: 16px;
    }

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

    .filters {
        flex-direction: column;
    }

    .filter-group {
        min-width: 100%;
    }

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

    .modal-content {
        margin: 24px auto;
        width: 95%;
    }

    table {
        font-size: 13px;
    }

    table th, table td {
        padding: 8px 12px;
    }
}

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

    .page-header h1 {
        font-size: 20px;
    }
}