/* styles.css */

/* 1. CSS Custom Properties (Variables)
-------------------------------------------------------------------------------- */
:root {
    /* Light Theme (Default) */
    --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

    --primary-color: #0d6efd; /* Bootstrap Primary Blue */
    --secondary-color: #6c757d; /* Bootstrap Secondary Gray */
    --accent-color: #007bff; /* A slightly different blue for accents if needed */
    --success-color: #198754; /* Bootstrap Success Green */
    --warning-color: #ffc107; /* Bootstrap Warning Yellow */
    --danger-color: #dc3545; /* Bootstrap Danger Red */
    --info-color: #0dcaf0; /* Bootstrap Info Cyan */

    --body-bg: #f8f9fa;
    --body-color: #212529;
    --text-muted: #6c757d;

    --card-bg: #ffffff;
    --card-border-color: rgba(0, 0, 0, 0.125);
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);

    --border-color: #dee2e6;
    --border-radius-sm: 0.2rem;
    --border-radius: 0.25rem;
    --border-radius-lg: 0.3rem;

    --link-color: var(--primary-color);
    --link-hover-color: #0a58ca; /* Darker primary */

    --input-bg: #fff;
    --input-border-color: #ced4da;
    --input-focus-border-color: #86b7fe; /* Bootstrap focus blue */
    --input-focus-box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);

    --sidebar-bg: #343a40;
    --sidebar-color: #adb5bd;
    --sidebar-link-hover-bg: #495057;
    --sidebar-link-active-bg: var(--primary-color);
    --sidebar-link-active-color: #fff;

    --navbar-bg: #ffffff;
    --navbar-border-color: var(--border-color);

    /* Spacing */
    --spacing-base: 1rem;
    --spacing-xs: calc(var(--spacing-base) * 0.25);
    --spacing-sm: calc(var(--spacing-base) * 0.5);
    --spacing-md: var(--spacing-base);
    --spacing-lg: calc(var(--spacing-base) * 1.5);
    --spacing-xl: calc(var(--spacing-base) * 3);

    /* Transitions */
    --transition-base: all 0.2s ease-in-out;
}

/* Changed from .dark-mode to [data-bs-theme="dark"] for Bootstrap 5 compatibility */
[data-bs-theme="dark"] {
    --primary-color: #0d6efd; /* Keep primary consistent or adjust if needed */
    --secondary-color: #adb5bd;
    --accent-color: #3B82F6; /* A lighter blue for dark mode accents */
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;

    --body-bg: #1a1a1a; /* Darker background */
    --body-color: #e0e0e0; /* Lighter text */
    --text-muted: #8c8c8c;

    --card-bg: #2c2c2c; /* Dark card background */
    --card-border-color: #444444;
    --card-shadow: 0 0.125rem 0.25rem rgba(255, 255, 255, 0.05);

    --border-color: #495057;

    --link-color: var(--accent-color);
    --link-hover-color: #60A5FA; /* Lighter accent for hover */

    --input-bg: #343a40;
    --input-border-color: #495057;
    --input-color: #f8f9fa; /* Added for form text color in dark mode */
    --input-focus-border-color: #86b7fe;
    --input-focus-box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);

    --sidebar-bg: #212529;
    --sidebar-color: #adb5bd;
    --sidebar-link-hover-bg: #343a40;
    --sidebar-link-active-bg: var(--accent-color);
    --sidebar-link-active-color: #fff;

    --navbar-bg: #2c2c2c;
    --navbar-border-color: #444444;
}

/* 2. Basic Reset & Global Styles
-------------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family-sans);
    line-height: 1.6;
    background-color: var(--body-bg);
    color: var(--body-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

img,
video {
    max-width: 100%;
    height: auto;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

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

/* 3. Layout Helpers (can be extended or rely on Bootstrap)
-------------------------------------------------------------------------------- */
.container {
    width: 90%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* Example: For a main app layout with sidebar */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px; /* Adjust as needed */
    background-color: var(--sidebar-bg);
    color: var(--sidebar-color);
    padding: var(--spacing-md);
    transition: var(--transition-base);
    /* Add more sidebar styles */
}

.main-content {
    flex-grow: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

/* 4. Basic Component Styles (to complement Bootstrap or for custom elements)
-------------------------------------------------------------------------------- */

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--spacing-md);
    overflow: hidden; /* For clean edges with images/headers */
}

.card-header,
.card-footer {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(0,0,0,0.03); /* Subtle differentiation */
    border-bottom: 1px solid var(--card-border-color);
}
.card-footer {
    border-top: 1px solid var(--card-border-color);
    border-bottom: none;
}

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

/* Buttons (basic structure if not fully relying on Bootstrap for everything) */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body-color);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.btn-primary {
    color: #fff;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: var(--link-hover-color);
    border-color: var(--link-hover-color);
}
/* Add other .btn-secondary, .btn-outline-primary etc. as needed, or let Bootstrap handle them */

/* Forms (basic styling for inputs) */
.form-control {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body-color); /* Will inherit from dark mode too */
    background-color: var(--input-bg);
    background-clip: padding-box;
    border: 1px solid var(--input-border-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border-radius: var(--border-radius);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

/* Changed from .dark-mode to [data-bs-theme="dark"] */
[data-bs-theme="dark"] .form-control {
    color: var(--input-color);
}

.form-control:focus {
    color: var(--body-color);
    background-color: var(--input-bg);
    border-color: var(--input-focus-border-color);
    outline: 0;
    box-shadow: var(--input-focus-box-shadow);
}
/* Changed from .dark-mode to [data-bs-theme="dark"] */
[data-bs-theme="dark"] .form-control:focus {
    color: var(--input-color);
}


/* Tables */
.table {
    width: 100%;
    margin-bottom: var(--spacing-md);
    color: var(--body-color);
    border-collapse: collapse;
}
.table th,
.table td {
    padding: 0.75rem;
    vertical-align: top;
    border-top: 1px solid var(--border-color);
}
.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid var(--border-color);
}

/* Navbar */
.navbar {
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--navbar-border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    /* Add more navbar styles */
}

/* 5. Utility Classes (examples, Bootstrap provides many)
-------------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.mt-1 { margin-top: var(--spacing-xs); }
.mb-1 { margin-bottom: var(--spacing-xs); }
/* ... more spacing, display, or text utilities if needed beyond Bootstrap ... */

/* 6. Theme Toggle Button (Example - actual button needs HTML)
-------------------------------------------------------------------------------- */
.theme-toggle-button {
    cursor: pointer;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    /* Position it as needed */
}

/* 7. Scrollbar Styling (Subtle - Optional)
-------------------------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--body-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Changed from .dark-mode to [data-bs-theme="dark"] */
[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--text-muted);
}
[data-bs-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}


/* Example Chat Interface Styles (very basic, can be expanded significantly) */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px); /* Example height */
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.chat-messages {
    flex-grow: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
    background-color: var(--body-bg);
}

.message {
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-lg);
    max-width: 75%;
    word-wrap: break-word;
}

.message.sent {
    background-color: var(--primary-color);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: var(--border-radius-sm);
}

/* Changed from .dark-mode to [data-bs-theme="dark"] */
[data-bs-theme="dark"] .message.sent {
     background-color: var(--accent-color);
}

.message.received {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    margin-right: auto;
    border-bottom-left-radius: var(--border-radius-sm);
}

/* Changed from .dark-mode to [data-bs-theme="dark"] */
[data-bs-theme="dark"] .message.received {
    color: var(--body-color);
}


.message-meta {
    font-size: 0.75rem;
    color: rgba(0,0,0,0.5);
    margin-top: var(--spacing-xs);
}

/* Changed from .dark-mode to [data-bs-theme="dark"] */
[data-bs-theme="dark"] .message-meta {
    color: rgba(255,255,255,0.5);
}
.message.sent .message-meta {
    color: rgba(255,255,255,0.7);
}


.chat-input {
    display: flex;
    padding: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
}

.chat-input input {
    flex-grow: 1;
    margin-right: var(--spacing-sm);
}