/* ======================================== */
/* === Global Styles & Variables ========== */
/* ======================================== */

/* Import modern, clean fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Lato:wght@400;700&display=swap');

:root {
    /* Modern Color Palette - Professional and clean */
    --primary-color: #2563eb; /* Modern blue */
    --primary-hover-color: #1e40af; /* Darker blue */
    --primary-light: #dbeafe; /* Light blue background */
    --secondary-color: #64748b; /* Slate grey */
    --secondary-hover: #475569;
    --accent-color: #8b5cf6; /* Purple accent */
    --accent-hover: #7c3aed;

    /* Neutrals */
    --light-grey: #f8fafc; /* Almost white */
    --medium-grey: #e2e8f0; /* Borders */
    --dark-grey: #334155; /* Text headings */
    --text-color: #1e293b; /* Main text - darker */
    --text-muted: #64748b; /* Muted text */
    --white-color: #ffffff;
    --background-color: #f1f5f9; /* Slightly tinted background */

    /* Feedback Colors */
    --success-bg: #d1fae5;
    --success-border: #6ee7b7;
    --success-text: #065f46;
    --success-color: #10b981;
    --success-hover: #059669;

    --error-bg: #fee2e2;
    --error-border: #fca5a5;
    --error-text: #991b1b;
    --delete-color: #ef4444;
    --delete-hover-color: #dc2626;

    --warning-bg: #fef3c7;
    --warning-border: #fcd34d;
    --warning-text: #92400e;

    --info-color: #06b6d4;
    --info-bg: #cffafe;
    --info-border: #67e8f9;
    --info-text: #164e63;

    --save-color: #10b981;
    --save-hover-color: #059669;

    /* Typography */
    --body-font: 'Inter', 'Lato', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --heading-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --base-font-size: 16px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing & Layout */
    --border-radius: 0.5rem; /* Slightly more rounded */
    --border-radius-lg: 0.75rem;
    --border-radius-sm: 0.375rem;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --box-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --box-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --transition-speed: 0.2s; /* Smooth transitions */
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

*, *::before, *::after {
    box-sizing: border-box; /* Apply border-box universally */
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    font-size: var(--base-font-size);
    font-weight: var(--font-weight-normal);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Overall page container */
.page-container {
    width: 100%;
    max-width: 1320px; /* Generous max-width */
    margin: 0 auto; /* Centers the container */
    padding: 0 15px; /* Horizontal padding */
    flex-grow: 1; /* Allow content area to grow */
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
     font-family: var(--heading-font);
     font-weight: var(--font-weight-bold);
     color: var(--dark-grey);
     margin-top: 1.5em;
     margin-bottom: 0.8em;
     line-height: 1.3;
     letter-spacing: -0.025em;
}

h1 {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
}
h2 {
    font-size: 1.875rem;
    font-weight: var(--font-weight-semibold);
}
h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}
a:hover {
    color: var(--primary-hover-color);
    text-decoration: none;
}
p {
    margin-bottom: 1rem;
}

hr {
    border: none;
    border-top: 1px solid var(--medium-grey);
    margin: 2rem 0;
    opacity: 0.5;
}


/* ======================================== */
/* === Navbar (Integrated & Refined) ===== */
/* ======================================== */

.navbar {
    background-color: var(--white-color);
    padding: 12px 24px;
    position: sticky;
    top: 0;
    z-index: 1030;
    box-shadow: var(--box-shadow);
    border-bottom: 1px solid var(--medium-grey);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

/* Left part of navbar: Hamburger + Menu List */
.navbar-left {
    display: flex;
    align-items: center;
}

/* Main navigation list */
.navbar ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex; /* Horizontal layout by default */
    align-items: center;
}

/* Navigation items */
.navbar ul li {
    margin: 0 8px; /* Consistent spacing between items */
}

/* Inline logo (visible on desktop) */
.navbar ul li.logo {
    margin-right: 15px; /* Space after logo */
    display: block; /* Show by default */
}
.navbar ul li.logo img {
    height: 40px; /* Control logo size */
    width: auto;
    vertical-align: middle; /* Align nicely with text */
}

/* Navigation links */
.navbar ul li a {
    text-decoration: none;
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    display: inline-block;
    font-weight: var(--font-weight-medium);
    font-size: 0.9375rem;
    position: relative;
}
.navbar ul li a:hover,
.navbar ul li a:focus {
    background-color: var(--primary-light);
    color: var(--primary-color);
    text-decoration: none;
    transform: translateY(-1px);
}
.navbar ul li a.active {
    background-color: var(--primary-color);
    color: var(--white-color);
    box-shadow: var(--box-shadow-sm);
}

/* Logout link styling */
.navbar ul li.logout {
    margin-left: auto;
}
.navbar ul li.logout a {
    background-color: var(--secondary-color);
    color: var(--white-color);
    font-weight: var(--font-weight-semibold);
}
.navbar ul li.logout a:hover {
    background-color: var(--secondary-hover);
    color: var(--white-color);
    transform: translateY(-1px);
    box-shadow: var(--box-shadow-sm);
}

/* Hamburger Menu Icon */
.hamburger {
    display: none; /* Hidden by default */
    cursor: pointer;
    padding: 10px; /* Make it easier to tap */
    margin-right: 10px; /* Space between icon and first nav item/logo */
}
.hamburger .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 4px 0; /* Spacing between bars */
    background-color: var(--dark-grey);
    transition: all 0.3s ease-in-out;
}
/* Optional: Add animation for hamburger icon */
.hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active .bar:nth-child(2) { opacity: 0; }
.hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* Top Right Logo (Absolute position, shown on mobile) */
.navbar-logo-right {
    position: absolute;
    top: 10px;
    right: 15px;
    height: 40px;
    width: auto;
    display: none; /* Hidden by default */
    z-index: 1031; /* Ensure above navbar background but potentially below dropdown if needed */
}

/* Navbar Responsive Behavior */
@media (max-width: 768px) {
    .navbar {
        justify-content: flex-start; /* Align hamburger to the very left */
    }
    .hamburger {
        display: block; /* Show hamburger */
    }
    .navbar ul { /* The main menu list */
        flex-direction: column; /* Stack items vertically */
        display: none; /* Hide the menu by default */
        position: absolute; /* Position it absolutely */
        top: 60px; /* Position below navbar */
        left: 0;
        width: 100%;
        background-color: var(--white-color);
        box-shadow: 0px 8px 16px rgba(0,0,0,0.1); /* Add shadow for dropdown */
        padding: 10px 0; /* Vertical padding */
        z-index: 1029; /* Below navbar itself, but above content */
        border-top: 1px solid var(--medium-grey); /* Separator */
    }
    .navbar ul.show {
        display: flex; /* Show the menu when .show class is added by JS */
    }
    .navbar ul li {
        margin: 8px 0; /* Vertical spacing for stacked items */
        width: 100%;
        text-align: center;
    }
    .navbar ul li.logo {
        display: none; /* Hide the inline logo when menu is stacked */
    }
    .navbar ul li.logout {
        margin-left: 0; /* Reset margin */
        margin-top: 15px; /* Add space before logout */
    }
    .navbar-logo-right {
        display: block; /* Show the absolutely positioned logo on mobile */
    }
}


/* ======================================== */
/* === Main Content Area & Containers ===== */
/* ======================================== */

/* General content area within the page container */
.content-area {
    padding: 25px 0; /* Vertical padding */
    flex-grow: 1; /* Takes up remaining space */
}

/* Card-like containers for content sections */
.card,
.dashboard-container,
.content-container,
.login-container {
    background: var(--white-color);
    border: 1px solid var(--medium-grey);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

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

/* Specific Centering for Login Container */
.login-container {
    max-width: 500px; /* Adjust max-width as needed */
    margin-left: auto;
    margin-right: auto;
    margin-top: 40px; /* Add some top margin */
}

.card-header,
.content-container > h1,
.login-container > h1 {
    padding: 1.5rem 2rem;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white-color) 100%);
    border-bottom: 2px solid var(--primary-color);
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    text-align: center;
    letter-spacing: -0.025em;
}
/* Reset margin for other headers within content-container if needed */
.content-container > h2,
.content-container > h3 {
     margin-top: 1.5em; /* Restore default margin */
     text-align: left; /* Keep sub-headers left-aligned */
}

.card-header h2, .card-header h3 { /* Nested headers within a card header */
    font-size: 1.2rem;
    color: var(--dark-grey);
    text-align: left;
    padding: 0;
    margin-bottom: 0;
    border-bottom: none;
    background-color: transparent;
}

/* Padding for container bodies */
.card-body,
.content-container > *:not(h1),
.login-container > *:not(h1) {
    padding: 2rem;
}

/* Remove top margin from first element after a styled header */
.card-header + .card-body > *:first-child,
.content-container > h1 + *,
.login-container > h1 + * {
     margin-top: 0;
}


/* ======================================== */
/* === Buttons (Refined) ================== */
/* ======================================== */

/* Base button style */
.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    text-decoration: none;
    margin: 0.25rem;
    position: relative;
    overflow: hidden;
}

.button::before,
button::before,
input[type="submit"]::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.button:active::before,
button:active::before,
input[type="submit"]:active::before {
    width: 300px;
    height: 300px;
}

.button:focus,
button:focus,
input[type="button"]:focus,
input[type="submit"]:focus {
    outline: 0;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}
input[type="button"], input[type="submit"], input[type="reset"] {
    appearance: button;
}

/* Primary Button */
.button,
button[type="submit"],
input[type="submit"],
.button-primary {
    color: var(--white-color);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow-sm);
}
.button:hover,
button[type="submit"]:hover,
input[type="submit"]:hover,
.button-primary:hover {
    color: var(--white-color);
    background-color: var(--primary-hover-color);
    border-color: var(--primary-hover-color);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* Secondary / Cancel Button */
.button.cancel-button,
button[type="button"],
input[type="button"],
input[type="reset"],
.button-secondary {
    color: var(--text-color);
    background-color: var(--white-color);
    border-color: var(--medium-grey);
    box-shadow: var(--box-shadow-sm);
}
.button.cancel-button:hover,
button[type="button"]:hover,
input[type="button"]:hover,
input[type="reset"]:hover,
.button-secondary:hover {
    color: var(--text-color);
    background-color: var(--light-grey);
    border-color: var(--secondary-color);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* Delete Button */
.button.delete-button,
.button.delete-button-inline,
.button-danger {
    color: var(--white-color);
    background-color: var(--delete-color);
    border-color: var(--delete-color);
    box-shadow: var(--box-shadow-sm);
}
.button.delete-button:hover,
.button.delete-button-inline:hover,
.button-danger:hover {
    color: var(--white-color);
    background-color: var(--delete-hover-color);
    border-color: var(--delete-hover-color);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* Save Button */
.button.save-button,
.button-success {
    color: var(--white-color);
    background-color: var(--save-color);
    border-color: var(--save-color);
    box-shadow: var(--box-shadow-sm);
}
.button.save-button:hover,
.button-success:hover {
    color: var(--white-color);
    background-color: var(--save-hover-color);
    border-color: var(--save-hover-color);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* Smaller Buttons */
.button-sm,
.button.inline-button,
.button.edit-button-inline,
.button.delete-button-inline,
.save-button {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    border-radius: var(--border-radius-sm);
}

/* Button group styling */
.action-buttons,
.action-buttons-inline {
     margin-bottom: 1rem;
     display: flex;
     flex-wrap: wrap;
     gap: 10px;
}
.action-buttons-inline { margin-bottom: 0; }


/* ======================================== */
/* === Forms (Refined) ==================== */
/* ======================================== */

form {
    margin-bottom: 1.5rem;
}

fieldset {
    border: 2px solid var(--medium-grey);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius-lg);
    background-color: var(--light-grey);
    transition: border-color var(--transition-speed) ease;
}

fieldset:focus-within {
    border-color: var(--primary-color);
    background-color: var(--white-color);
}

legend {
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    padding: 0 0.75rem;
    font-size: 1.125rem;
    margin-left: 0.5rem;
    margin-bottom: 1rem;
    background-color: var(--white-color);
    border-radius: var(--border-radius);
}

form label {
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.5rem;
    display: inline-block;
    color: var(--dark-grey);
    font-size: 0.9375rem;
}

form input:not([type="button"]):not([type="submit"]):not([type="reset"]):not([type="checkbox"]):not([type="radio"]),
form textarea,
form select {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--white-color);
    background-clip: padding-box;
    border: 2px solid var(--medium-grey);
    appearance: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    margin-bottom: 1rem;
}

form input:read-only {
    background-color: var(--light-grey);
    cursor: not-allowed;
    opacity: 0.6;
    border-style: dashed;
}

form input:focus,
form textarea:focus,
form select:focus {
    color: var(--text-color);
    background-color: var(--white-color);
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

form textarea {
    min-height: 120px;
    resize: vertical;
    font-family: var(--body-font);
}

form select {
    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='%23343a40' 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;
    padding-right: 2.5rem;
}

form small {
    display: block;
    margin-top: -0.75rem;
    margin-bottom: 1rem;
    font-size: 0.875em;
    color: var(--text-muted);
}

/* ======================================== */
/* === Tables (Refined) =================== */
/* ======================================== */

/* Wrapper for horizontal scrolling */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 1rem;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 0;
    background-color: var(--white-color);
    border: 1px solid var(--medium-grey);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--box-shadow-sm);
}

.data-table th,
.data-table td {
    padding: 0.875rem 1.125rem;
    border: none;
    border-bottom: 1px solid var(--medium-grey);
    text-align: left;
    vertical-align: middle;
    line-height: 1.5;
    overflow-wrap: break-word;
}

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

.data-table thead th {
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--light-grey) 100%);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    vertical-align: middle;
    border-bottom: 2px solid var(--primary-color);
    position: sticky;
    top: 64px;
    z-index: 10;
}

.data-table thead th[data-sortable="true"],
.data-table thead th[data-column] {
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-speed) ease;
}

.data-table thead th[data-sortable="true"]:hover,
.data-table thead th[data-column]:hover {
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-hover-color) 100%);
    color: var(--white-color);
}

/* Row Striping & Hover */
.data-table tbody tr:nth-of-type(odd) {
    background-color: var(--white-color);
}

.data-table tbody tr:nth-of-type(even) {
    background-color: var(--light-grey);
}

.data-table tbody tr {
    transition: all var(--transition-speed) ease;
}

.data-table tbody tr:hover {
    background-color: var(--primary-light);
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
    cursor: pointer;
}

/* Footer styling */
.data-table tfoot td {
    font-weight: var(--font-weight-bold);
    background: linear-gradient(180deg, var(--light-grey) 0%, var(--medium-grey) 100%);
    border-top: 3px solid var(--primary-color);
    color: var(--dark-grey);
    font-size: 0.9375rem;
}

/* Inline Editing Styles */
.data-table td.editing { padding: 0; }
.data-table td .edit-input { width: 100%; box-sizing: border-box; padding: .5rem .75rem; margin: 0; border: 1px solid var(--primary-color); border-radius: 0; font-family: inherit; font-size: inherit; line-height: 1.5; }
.data-table td .edit-input:focus { outline: none; box-shadow: none; }
.data-table td.saving { background-color: var(--warning-bg) !important; }
.data-table td.update-success { background-color: var(--success-bg) !important; transition: background-color 0.5s ease; }
.data-table td.update-error { background-color: var(--error-bg) !important; }
.inline-error-message { color: var(--error-text); font-size: 0.8em; padding: 2px 5px; margin-top: 2px; display: block; }

/* Sorting Indicators */
th .sort-indicator {
    margin-left: 0.375rem;
    font-size: 0.75em;
    color: var(--text-muted);
    transition: color var(--transition-speed) ease;
}

th.sorted-asc .sort-indicator,
th.sorted-desc .sort-indicator {
    color: var(--primary-color);
}

th[data-column]::after {
    content: '⇅';
    margin-left: 0.5rem;
    opacity: 0.3;
    font-size: 0.875rem;
    transition: all var(--transition-speed) ease;
}

th.sorted-asc::after {
    content: '↑';
    opacity: 1;
    color: var(--primary-color);
}

th.sorted-desc::after {
    content: '↓';
    opacity: 1;
    color: var(--primary-color);
}

/* ======================================== */
/* === Messages (Refined) ================= */
/* ======================================== */

.alert {
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    border: 2px solid transparent;
    border-radius: var(--border-radius-lg);
    text-align: left;
    box-shadow: var(--box-shadow-sm);
    position: relative;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-heading {
    color: inherit;
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.5rem;
}

.alert-link {
    font-weight: var(--font-weight-semibold);
}

.alert-success,
.success-message {
    color: var(--success-text);
    background-color: var(--success-bg);
    border-color: var(--success-border);
    border-left-width: 4px;
}

.alert-danger,
.error-message {
    color: var(--error-text);
    background-color: var(--error-bg);
    border-color: var(--error-border);
    border-left-width: 4px;
}

.alert-warning,
.warning-message {
    color: var(--warning-text);
    background-color: var(--warning-bg);
    border-color: var(--warning-border);
    border-left-width: 4px;
}

.alert-info,
.info-message {
    color: var(--info-text);
    background-color: var(--info-bg);
    border-color: var(--info-border);
    border-left-width: 4px;
}

table .error-message, table .alert-danger { background-color: transparent; border: none; padding: 2px; margin: 0; text-align: inherit; font-weight: normal; font-size: 0.9em; }


/* ======================================== */
/* === Specific Component Styles ========== */
/* ======================================== */

/* ======================================== */
/* === Modals ============================= */
/* ======================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
    align-items: center;
    justify-content: center;
}

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

.modal-content {
    background-color: var(--white-color);
    margin: 5% auto;
    padding: 0;
    border: none;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    box-shadow: var(--box-shadow-lg);
    animation: slideDown 0.3s ease;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Modal with header/footer structure - no padding on content */
.modal-content:has(.modal-header) {
    padding: 0;
}

/* Modal without header/footer - apply padding directly */
.modal-content:not(:has(.modal-header)):not(:has(.modal-footer)) {
    padding: 2rem;
}

/* Modal header styling */
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 2px solid var(--medium-grey);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--light-grey);
    flex-shrink: 0;
}

.modal-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
}

.modal-header .close {
    background: none;
    border: none;
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    transition: all var(--transition-speed) ease;
}

.modal-header .close:hover {
    color: var(--delete-color);
    transform: scale(1.1);
}

/* Modal body - scrollable area for form content */
.modal-content form {
    padding: 1.5rem;
    padding-bottom: 0;
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 0;
    background-color: var(--white-color);
}

/* Wrapper for form fields to ensure white background coverage */
.modal-content form > *:not(.modal-footer) {
    background-color: var(--white-color);
}

/* Modal footer styling */
.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--medium-grey);
    background-color: var(--light-grey);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    flex-shrink: 0;
}

/* When modal-footer is inside a form, extend to edges */
.modal-content form .modal-footer {
    margin: 1.5rem -1.5rem 0 -1.5rem;
    padding-bottom: 1.5rem;
}

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

.modal-content h2 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1.25rem;
    font-weight: var(--font-weight-bold);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.75rem;
}

.modal-content ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.modal-content ul li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.close-button {
    color: var(--text-muted);
    float: right;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    line-height: 1;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    margin: 0;
}

.close-button:hover,
.close-button:focus {
    color: var(--delete-color);
    transform: scale(1.2) rotate(90deg);
}

/* ======================================== */
/* === Specific Component Styles ========== */
/* ======================================== */

/* Details Lists (view_client, view_provider) */
.details-section {
    margin-bottom: 1.5rem;
}
.details-section p {
    margin-bottom: 0.75em;
    line-height: 1.5;
    display: flex;
    flex-wrap: wrap;
}
.details-section strong {
    color: var(--dark-grey);
    min-width: 150px;
    flex-shrink: 0;
    margin-right: 10px;
    font-weight: 700;
}

/* Notes Section */
.notes-list { margin-top: 1.5rem; }
.note-entry { border: 1px solid var(--medium-grey); padding: 15px; margin-bottom: 15px; border-radius: var(--border-radius); background-color: var(--white-color); box-shadow: var(--box-shadow-sm); }
.note-meta { font-size: 0.85rem; color: var(--secondary-color); margin-bottom: 8px; border-bottom: 1px dashed var(--medium-grey); padding-bottom: 8px; }
.note-content { margin-bottom: 10px; }
.note-entry .action-buttons-inline { margin-top: 10px; justify-content: flex-end; }

/* Search Container */
.search-container {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--white-color) 0%, var(--light-grey) 100%);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--medium-grey);
    box-shadow: var(--box-shadow);
}

.search-container label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--dark-grey);
    font-size: 1rem;
}

.search-container input[type="search"],
.search-container input[type="text"] {
    display: inline-block;
    width: auto;
    min-width: 300px;
    padding: 0.625rem 0.875rem;
    border: 2px solid var(--medium-grey);
    border-radius: var(--border-radius);
    margin-right: 0.75rem;
    font-size: 0.9375rem;
    transition: all var(--transition-speed) ease;
}

.search-container input[type="search"]:focus,
.search-container input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.search-container .buttons {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Authenticator Store Links */
.store-table { border-collapse: collapse; margin: 20px auto; width: auto; }
.store-table td { border: none; padding: 10px; vertical-align: middle; }
.authenticator-name { font-weight: bold; text-align: right; padding-right: 20px; color: var(--dark-grey); }
.store-links a { margin-right: 10px; display: inline-block; transition: transform 0.2s ease, opacity 0.2s ease; opacity: 0.9; }
.store-links a:hover { transform: scale(1.05); opacity: 1; }
.store-links img { height: 45px; width: auto; vertical-align: middle; }

/* Footer styling */
.footer,
footer {
     background: linear-gradient(135deg, var(--dark-grey) 0%, var(--secondary-color) 100%);
     color: var(--light-grey);
     text-align: center;
     padding: 1.25rem 0;
     margin-top: auto;
     font-size: 0.875rem;
     border-top: 3px solid var(--primary-color);
     box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
}

.footer p,
footer p {
     margin: 0.5rem 0;
     line-height: 1.6;
}

.footer a,
footer a {
     color: var(--primary-light);
     text-decoration: none;
     transition: all var(--transition-speed) ease;
     font-weight: var(--font-weight-medium);
}

.footer a:hover,
footer a:hover {
     color: var(--white-color);
     text-decoration: underline;
}

.version-info {
     font-size: 0.75rem;
     color: var(--medium-grey);
     margin-top: 0.5rem;
     opacity: 0.8;
}

/* ======================================== */
/* === Responsive Adjustments ============ */
/* ======================================== */

@media (max-width: 992px) {
    .page-container { max-width: 960px; }
}

@media (max-width: 768px) {
    body { font-size: 15px; }
    .page-container { padding: 0 10px; }
    .content-area { padding: 15px 0; }

    /* Reduce padding/font size for card/container headers */
    .card-header, .content-container > h1, .login-container > h1 { padding: 0.8rem 1rem; font-size: 1.3rem; }
    /* Reduce padding for container bodies */
    .card-body, .content-container > *:not(h1), .login-container > *:not(h1) { padding: 1rem; }

    /* Reduce button size */
    .button, button, input[type="button"], input[type="submit"] { padding: .375rem .75rem; font-size: 0.9rem; }
    .button-sm, .button.inline-button, .save-button { padding: .2rem .4rem; font-size: .8rem; }

    /* Responsive table adjustments */
    .table-responsive { margin-bottom: 0.5rem; }
    .data-table th, .data-table td { padding: .5rem .5rem; font-size: .85rem; line-height: 1.4; }
    .data-table thead th { font-size: 0.8rem; }

    /* --- Responsive Column Hiding (CHECK INDICES!) --- */
    /* Assuming 13 total columns initially:
       0: Provider, 1: Billed, 2: DOS, 3: Neg, 4: Comm, 5: PayAmt, 6: ApprRed,
       7: ClientChk, 8: CollAmt, 9: CollDate, 10: FirmChk, 11: PayDate, 12: Actions
       Let's hide: ApprRed(6), ClientChk(7), CollDate(9), FirmChk(10)
    */
    #transactionsTable th:nth-child(7), #transactionsTable td:nth-child(7), /* Approved Reduction */
    #transactionsTable th:nth-child(8), #transactionsTable td:nth-child(8), /* Client Check # */
    #transactionsTable th:nth-child(10), #transactionsTable td:nth-child(10),/* Date Collected */
    #transactionsTable th:nth-child(11), #transactionsTable td:nth-child(11) { /* Firm Check # */
        display: none;
    }
    /* Hide corresponding footer cells (check indices carefully) */
     #transactionsTable tfoot td:nth-child(7), /* ApprRed */
     #transactionsTable tfoot td:nth-child(8), /* Client Check Spacer */
     #transactionsTable tfoot td:nth-child(10),/* CollDate Spacer */
     #transactionsTable tfoot td:nth-child(11) { /* FirmCheck Spacer */
         display: none;
     }
    /* Adjust final colspan in footer:
       Original: 13 cols. Hidden 4 = 9 data cols + Actions = 10.
       Footer structure: Totals(1), Billed(1), DOS(1), Neg(1), Comm(1), PayAmt(1), Red(1), Chk#(1), Coll(1), DateColl(1), FirmChk(1), PayDate(1), Act(1)
       Footer w/ hiding: Totals(1), Billed(1), DOS(1), Neg(1), Comm(1), PayAmt(1), Coll(1), PayDate(1), Act(1) = 9 Cells shown
       Need to adjust the final colspan to account for the missing cells.
       Original colspan=3 covered PayDate, Actions + 1 more? Let's assume it should cover the remaining *visible* columns after CollTotal.
       Visible after CollTotal: PayDate(1), Actions(1). Need colspan=1 if we mean the PayDate column.
       Let's simplify and assume the colspan should cover everything after Collected Amount.
       Visible cells: ProviderTotal(1), Billed(1), DOS Spacer(1), Neg(1), Comm(1), PayAmt(1), Red(1), Chk Spacer(1), Coll(1), DateColl Spacer(1), FirmChk Spacer(1), PayDate(1), Action Spacer(1)
       After Hiding (Indices from 1): Billed(2), DOS(3), Neg(4), Comm(5), PayAmt(6), Coll(9), PayDate(12), Actions(13)
       Visible Footer Cells: Totals(1), Billed(2), DOS Spacer(3), Neg(4), Comm(5), PayAmt(6), Coll(9), PayDate(12), Actions(13) + Hidden[Red(7), Chk(8), CollDate(10), FirmChk(11)]
       Structure: td(Totals), td#billed, td(Spacer), td#neg, td#comm, td#pay, td#red(HIDDEN), td(Spacer_Chk)(HIDDEN), td#coll, td(Spacer_CollDate)(HIDDEN), td(Spacer_FirmChk)(HIDDEN), td#paydate(should exist?), td(Actions Spacer?)
       Let's adjust the colspan based on the *updated* number of columns after Commission was added (13 total initially). Hiding 4 leaves 9.
       Structure in HTML: Totals, Billed, Spacer, Neg, Comm, Pay, Red, Spacer, Coll, Spacer*3 = 13.
       Footer cells: 1(Total Label) + 1(Billed) + 1(Spacer) + 1(Neg) + 1(Comm) + 1(Pay) + 1(Red) + 1(Spacer) + 1(Coll) + 3(Colspan) = 12? Let's re-check the PHP.
       PHP tfoot: Totals(1), Billed(1), Spacer(1), Neg(1), Comm(1), Pay(1), Red(1), Spacer(1), Coll(1), colspan="3" (covering DateColl, FirmChk, PayDate, Actions?) -> 1+1+1+1+1+1+1+1+1+3 = 12. Wait, 13 columns in thead.
       thead: Prov, Bill, DOS, Neg, Comm, Pay, ApprRed, ClientChk, CollAmt, CollDate, FirmChk, PayDate, Actions = 13
       tbody: td (Prov), td(Bill), td(DOS), td(Neg), td(Comm), td(Pay), td(ApprRed), td(ClientChk), td(CollAmt), td(CollDate), td(UserChk), td(PayDate), td(Actions) = 13
       tfoot: Totals(1), Billed(1), SpacerDOS(1), Neg(1), Comm(1), Pay(1), Red(1), SpacerChk(1), Coll(1), colspan="3" (Should cover CollDate, FirmChk, PayDate, Actions? - needs colspan 4!)
       Let's assume the initial colspan=3 was wrong and should be 4.
       Now hiding 4 columns (ApprRed(7), ClientChk(8), CollDate(10), FirmChk(11)).
       The corresponding footer cells/spacers: RedTotal(7), SpacerChk(8), SpacerCollDate(10), SpacerFirmChk(11) are hidden.
       Remaining footer: Totals(1), Billed(2), SpacerDOS(3), Neg(4), Comm(5), Pay(6), Coll(9), SpacerPayDate(12?), Actions(13?). Colspan needs adjustment.
       Visible data columns: 1,2,3,4,5,6, 9, 12, 13 (9 columns)
       Visible footer columns: Totals(1), Billed(2), SpacerDOS(3), Neg(4), Comm(5), Pay(6), Coll(9), SpacerPayDate(12), SpacerActions(13)?
       Let's assume the colspan covers the columns starting from Date Collected. Hiding CollDate(10), FirmChk(11). Still visible: PayDate(12), Actions(13). Need colspan=2?
    */
     #transactionsTable tfoot td[colspan="4"], /* Target original colspan */
     #transactionsTable tfoot td[colspan="3"] { /* Or target previous incorrect one */
         colspan: 2; /* Adjust based on PayDate and Actions remaining visible */
     }


    /* Stack details labels/values */
    .details-section p { flex-direction: column; }
    .details-section strong { min-width: unset; margin-bottom: 3px; }
}

@media (max-width: 576px) {
    /* Stack navbar items on very small screens */
    /* .navbar-container { flex-direction: column; align-items: center; } */
    /* .navbar-brand { margin-bottom: 10px; } */
    /* .navbar ul { justify-content: center; width: 100%; } */
    /* .navbar ul li { margin: 3px; } */
    /* Keep mobile toggle behavior from 768px */

    /* Force full width buttons */
    .action-buttons, .search-container .buttons { flex-direction: column; align-items: stretch; }
    .action-buttons .button, .search-container .button { width: 100%; margin-left: 0; margin-right: 0; }

    .login-container { margin: 15px; max-width: none; /* Allow login to fill small screen */ }
}