/* ==========================================================================
   Resource Schedule - Base Design System
   Variables, resets, layout, shared components
   ========================================================================== */

/* --- CSS Variables (Design Tokens) --- */
:root {
    /* Primary - muted blue */
    --primary: #4a6da7;
    --primary-dark: #3b5998;
    --primary-light: #dce4f0;
    --primary-bg: #f2f5fa;

    /* Semantic - desaturated */
    --success: #3d8b6e;
    --success-dark: #2d6b54;
    --success-light: #dceee6;

    --warning: #c4933f;
    --warning-dark: #a57a2e;
    --warning-light: #f5ead4;

    --danger: #b85450;
    --danger-dark: #9a3f3c;
    --danger-light: #f0d8d7;

    --info: #6b8db5;
    --info-light: #dfe8f2;

    /* Grays */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Spacing scale */
    --sp-1: 2px;
    --sp-2: 4px;
    --sp-3: 8px;
    --sp-4: 12px;
    --sp-5: 16px;

    /* Font */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 9px;
    --font-size-sm: 10px;
    --font-size-base: 11px;
    --font-size-md: 13px;
    --font-size-lg: 15px;
    --font-size-xl: 20px;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.4;
    color: var(--gray-800);
    background: var(--gray-50);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

input, button, select, textarea {
    font-family: inherit;
    font-size: inherit;
    border-radius: 0;
}

/* --- Header --- */
#app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-3) var(--sp-4);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: var(--sp-1);
}

.header-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

.header-subtitle {
    font-size: var(--font-size-base);
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: var(--sp-2);
}

.header-sep {
    color: var(--gray-300);
}

.header-actions {
    display: flex;
    gap: var(--sp-2);
    align-items: center;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: var(--sp-2) 10px;
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.4;
    border: 1px solid var(--gray-300);
    background: #fff;
    color: var(--gray-700);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.1s, border-color 0.1s;
}

.btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.btn:active {
    background: var(--gray-200);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

.btn-primary:active {
    background: #2f4a80;
}

.btn-default {
    background: #fff;
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-icon {
    flex-shrink: 0;
}

/* --- KPI Bar --- */
#kpi-bar {
    display: flex;
    align-items: center;
    gap: var(--sp-5);
    padding: var(--sp-3) var(--sp-4);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    font-size: var(--font-size-base);
    min-height: 32px;
}

.kpi-item {
    display: flex;
    align-items: baseline;
    gap: var(--sp-2);
}

.kpi-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
}

.kpi-value {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--gray-800);
    font-variant-numeric: tabular-nums;
}

.kpi-value.kpi-warning {
    color: var(--warning-dark);
}

.kpi-value.kpi-danger {
    color: var(--danger-dark);
}

/* --- Filter Bar --- */
#filter-bar {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    padding: var(--sp-3) var(--sp-4);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
}

/* --- Grid Container --- */
#grid-container {
    padding: 0;
    overflow-x: auto;
    flex: 1;
}

/* --- Loading Overlay --- */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
}

#loading-overlay.hidden {
    display: none;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-4);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: var(--font-size-md);
    color: var(--gray-500);
    font-weight: 500;
}

/* --- Session Expired Overlay --- */
#session-expired-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(31, 41, 55, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

#session-expired-overlay.hidden {
    display: none;
}

.session-expired-modal {
    background: #fff;
    padding: 32px 40px;
    text-align: center;
    border: 1px solid var(--gray-200);
    max-width: 400px;
}

.session-expired-modal svg {
    margin-bottom: var(--sp-4);
}

.session-expired-modal h2 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--sp-3);
}

.session-expired-modal p {
    font-size: var(--font-size-md);
    color: var(--gray-500);
    line-height: 1.5;
}

/* --- Toast Container --- */
#toast-container {
    position: fixed;
    bottom: var(--sp-5);
    right: var(--sp-5);
    z-index: 8000;
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-3) var(--sp-4);
    background: #fff;
    border: 1px solid var(--gray-200);
    border-left: 3px solid var(--info);
    font-size: var(--font-size-base);
    color: var(--gray-700);
    max-width: 360px;
    pointer-events: auto;
    animation: toast-slide-in 0.2s ease-out;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.toast.toast-success {
    border-left-color: var(--success);
}

.toast.toast-error {
    border-left-color: var(--danger);
}

.toast.toast-warning {
    border-left-color: var(--warning);
}

.toast.toast-info {
    border-left-color: var(--info);
}

.toast.toast-removing {
    animation: toast-slide-out 0.2s ease-in forwards;
}

@keyframes toast-slide-in {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes toast-slide-out {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* --- Print Dialog --- */
#print-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(31, 41, 55, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 7000;
}

#print-dialog.hidden {
    display: none;
}

.print-dialog-content {
    background: #fff;
    padding: 20px 24px;
    border: 1px solid var(--gray-200);
    min-width: 280px;
}

.print-dialog-content h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--sp-4);
    color: var(--gray-800);
}

.print-options {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    margin-bottom: var(--sp-5);
}

.print-option {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    font-size: var(--font-size-base);
    color: var(--gray-700);
    cursor: pointer;
}

.print-option input[type="radio"] {
    margin: 0;
}

.print-dialog-actions {
    display: flex;
    gap: var(--sp-3);
    justify-content: flex-end;
}

/* --- Utility Classes --- */
.hidden {
    display: none !important;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--gray-500);
}

.text-small {
    font-size: var(--font-size-sm);
}

.font-tabular {
    font-variant-numeric: tabular-nums;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}