/**
 * BIOGAS Plant Management System
 * Main Stylesheet
 * Colors: Black (#000000) & Navy (#0a1628, #1e3a5f)
 * Font: Montserrat
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    /* Primary Colors */
    --color-black: #000000;
    --color-navy-dark: #0a1628;
    --color-navy: #1e3a5f;
    --color-navy-light: #2c5282;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Status Colors */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;

    /* Typography */
    --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   Base Styles
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-navy-dark);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-navy);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-navy-light);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    font-family: var(--font-family);
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--color-navy);
    border-color: var(--color-navy);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-navy-dark);
    border-color: var(--color-navy-dark);
    color: var(--color-white);
}

.btn-secondary {
    background-color: var(--color-gray-600);
    border-color: var(--color-gray-600);
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-gray-700);
    border-color: var(--color-gray-700);
}

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

.btn-outline-primary:hover {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.btn-dark {
    background-color: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
}

.btn-dark:hover {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-800);
}

/* ============================================
   Forms
   ============================================ */
.form-control,
.form-select {
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-300);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-navy);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.15);
}

.form-label {
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: 0.5rem;
}

.form-text {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background-color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-lg);
    font-weight: 600;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    background-color: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
    padding: var(--spacing-md) var(--spacing-lg);
}

/* ============================================
   Tables
   ============================================ */
.table {
    font-size: var(--font-size-sm);
}

.table thead th {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
    font-weight: 600;
    padding: var(--spacing-md);
    border: none;
}

.table tbody td {
    padding: var(--spacing-md);
    vertical-align: middle;
    border-color: var(--color-gray-200);
}

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

/* ============================================
   Badges
   ============================================ */
.badge {
    font-weight: 500;
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-full);
}

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

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

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

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

/* ============================================
   Alerts
   ============================================ */
.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
}

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

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

.alert-danger {
    background-color: var(--color-danger-light);
    color: #991b1b;
}

.alert-info {
    background-color: var(--color-info-light);
    color: #1e40af;
}

/* ============================================
   Utilities
   ============================================ */
.text-navy {
    color: var(--color-navy) !important;
}

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

.bg-navy {
    background-color: var(--color-navy) !important;
}

.bg-navy-dark {
    background-color: var(--color-navy-dark) !important;
}

.border-navy {
    border-color: var(--color-navy) !important;
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-fade-in {
    animation: fadeIn var(--transition-base);
}

.animate-slide-up {
    animation: slideUp var(--transition-base);
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* ============================================
   Loading Spinner
   ============================================ */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-navy);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    background-color: var(--color-white);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15), 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: toastSlideIn 0.3s ease-out;
    min-width: 320px;
    border-left: 4px solid;
}

.toast.toast-hiding {
    animation: toastSlideOut 0.3s ease-in forwards;
}

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

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

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

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

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.toast-success .toast-icon {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

.toast-danger .toast-icon, .toast-error .toast-icon {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

.toast-warning .toast-icon {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.toast-info .toast-icon {
    background-color: var(--color-info-light);
    color: var(--color-info);
}

.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-title {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    margin-bottom: 2px;
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.4;
    word-wrap: break-word;
}

.toast-close {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    color: var(--color-gray-400);
    font-size: 18px;
    line-height: 1;
    transition: color var(--transition-fast);
    flex-shrink: 0;
}

.toast-close:hover {
    color: var(--color-gray-600);
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background-color: currentColor;
    opacity: 0.3;
    border-radius: 0 0 0 var(--radius-lg);
}

@keyframes toastSlideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes toastSlideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ============================================
   Global Modal Styles - Navy & Black Theme
   ============================================ */
.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-header {
    background: linear-gradient(90deg, #e0e0e0 0%, #2d2d2d 50%, #000000 100%) !important;
    color: var(--color-gray-900);
    padding: 1.25rem 1.5rem;
    border-bottom: none;
}

/* Override Bootstrap bg classes on modal headers */
.modal-header.bg-primary,
.modal-header.bg-secondary,
.modal-header.bg-info,
.modal-header.bg-warning,
.modal-header.bg-dark {
    background: linear-gradient(90deg, #e0e0e0 0%, #2d2d2d 50%, #000000 100%) !important;
}

.modal-header.bg-danger {
    background: linear-gradient(90deg, #fca5a5 0%, #dc2626 50%, #7f1d1d 100%) !important;
}

.modal-header.bg-success {
    background: linear-gradient(90deg, #86efac 0%, #16a34a 50%, #14532d 100%) !important;
}

/* Text colors for gradient headers */
.modal-header.bg-primary .modal-title,
.modal-header.bg-secondary .modal-title,
.modal-header.bg-info .modal-title,
.modal-header.bg-warning .modal-title,
.modal-header.bg-dark .modal-title {
    color: #1a1a1a !important;
}

.modal-header.bg-danger .modal-title {
    color: #450a0a !important;
}

.modal-header.bg-success .modal-title {
    color: #052e16 !important;
}

/* Remove Bootstrap text-white class effect on modal headers */
.modal-header.text-white .modal-title,
.modal-header.text-white {
    color: inherit !important;
}

.modal-header .modal-title {
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #1a1a1a;
    text-shadow: none;
}

.modal-header .modal-title i {
    font-size: 1.25rem;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.modal-header .btn-close:hover {
    opacity: 1;
}

.modal-body {
    padding: 1.5rem;
    background: var(--color-gray-50);
}

.modal-footer {
    padding: 1rem 1.5rem;
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
}

/* Form Sections in Modals */
.form-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    height: 100%;
    border: 1px solid var(--color-gray-200);
    transition: box-shadow var(--transition-base);
}

.form-section:hover {
    box-shadow: var(--shadow-md);
}

.form-section-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-navy);
    display: flex;
    align-items: center;
}

.form-section-title i {
    margin-right: 0.5rem;
    font-size: 1rem;
}

/* Modal Form Elements */
.modal .form-label {
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--color-gray-700);
    margin-bottom: 0.35rem;
}

.modal .form-control,
.modal .form-select {
    font-size: 0.9rem;
    padding: 0.6rem 0.875rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-300);
    background-color: var(--color-white);
    transition: all var(--transition-fast);
}

.modal .form-control:focus,
.modal .form-select:focus {
    border-color: var(--color-navy);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.15);
}

.modal .form-control::placeholder {
    color: var(--color-gray-400);
    font-size: 0.85rem;
}

.modal .form-control[readonly] {
    background-color: var(--color-gray-100);
    color: var(--color-navy);
    font-weight: 600;
}

.modal textarea.form-control {
    resize: none;
}

.modal .form-check-input:checked {
    background-color: var(--color-navy);
    border-color: var(--color-navy);
}

.modal .form-check-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.modal .form-text {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

/* Delete/Danger Modal */
.modal-danger .modal-header {
    background: linear-gradient(90deg, #fca5a5 0%, #dc2626 50%, #7f1d1d 100%);
}

.modal-danger .modal-header .modal-title {
    color: #450a0a;
}

/* Success Modal */
.modal-success .modal-header {
    background: linear-gradient(90deg, #86efac 0%, #16a34a 50%, #14532d 100%);
}

.modal-success .modal-header .modal-title {
    color: #052e16;
}

/* Modal Sizes */
.modal-xl .form-section {
    margin-bottom: 0;
}

/* Small Modal (Confirmation dialogs) */
.modal-sm .modal-body {
    text-align: center;
    padding: 2rem 1.5rem;
}

.modal-sm .modal-footer {
    justify-content: center;
    gap: 0.5rem;
}

/* Responsive Modal */
@media (max-width: 991.98px) {
    .modal-xl .form-section {
        margin-bottom: 1rem;
    }

    .modal-xl .modal-body {
        max-height: 70vh;
        overflow-y: auto;
    }
}

@media (max-width: 767.98px) {
    .modal-dialog {
        margin: 0.5rem;
    }

    .modal-header {
        padding: 1rem;
    }

    .modal-body {
        padding: 1rem;
    }

    .form-section {
        padding: 1rem;
    }

    .form-section-title {
        font-size: 0.8rem;
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .btn {
        padding: 0.5rem 1rem;
    }

    .toast-container {
        left: 10px;
        right: 10px;
        max-width: none;
    }

    .toast {
        min-width: auto;
    }
}