/*
  Modern Minimalist UI Theme
  - CSS Custom Properties for Light/Dark/System
  - Component styles: layout, cards, buttons, forms, toasts
  - Subtle animations and accessibility
*/

/* Theme Variables */
:root {
    /* Palette - Light */
    --bg-primary: #FAFAFA;
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-elev-1: #FFFFFF;
    --bg-elev-2: #F6F7F9;
    --text-primary: #333333;
    --text-secondary: #555555;
    --text-muted: #767676;
    --border-color: #E0E0E0;
    --input-border-color: #6c757d;
    --accent-primary: #E3F2FD; /* pastel blue */
    --accent-secondary: #F3E5F5; /* pastel purple */
    --accent-tertiary: #E8F5E8; /* pastel green */
    --accent-blue-600: #1a73e8;
    --accent-purple-600: #CE93D8;
    --accent-green-600: #A5D6A7;
    --accent-info: #BBDEFB;
    --accent-success: #198754;
    --accent-error: #FFCDD2;
    --shadow-color: 0, 0, 0;

    /* Effects */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(var(--shadow-color), 0.08);
    --shadow-md: 0 4px 16px rgba(var(--shadow-color), 0.12);
    --shadow-lg: 0 8px 24px rgba(var(--shadow-color), 0.16);
    --transition-fast: 0.2s ease;
    --transition-med: 0.3s ease;
}

/* Dark mode via prefers-color-scheme */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #121212;
        --bg-secondary: #161616;
        --bg-card: #1B1B1B;
        --bg-elev-1: #181818;
        --bg-elev-2: #202020;
        --text-primary: #E0E0E0;
        --text-secondary: #CFCFCF;
        --text-muted: #A0A0A0;
        --border-color: #2E2E2E;
        --input-border-color: #6c757d;
        --accent-primary: #BBDEFB;
        --accent-secondary: #E1BEE7;
        --accent-tertiary: #C8E6C9;
            --accent-blue-600: #1a73e8;
    --accent-purple-600: #CE93D8;
    --accent-green-600: #A5D6A7;
    --accent-info: #1a73e8;
    --accent-success: #198754;
    --accent-error: #EF9A9A;
        --shadow-color: 0, 0, 0;
    }
}

/* Explicit class-based dark mode override when body has .theme-dark */
body.theme-dark {
    --bg-primary: #121212;
    --bg-secondary: #161616;
    --bg-card: #1B1B1B;
    --bg-elev-1: #181818;
    --bg-elev-2: #202020;
    --text-primary: #E0E0E0;
    --text-secondary: #CFCFCF;
    --text-muted: #A0A0A0;
    --border-color: #2E2E2E;
    --input-border-color: #6c757d;
    --accent-primary: #BBDEFB;
    --accent-secondary: #E1BEE7;
    --accent-tertiary: #C8E6C9;
    --accent-info: #90CAF9;
    --accent-success: #198754;
    --accent-error: #EF9A9A;
}

/* Global Resets and Typography */
html {
    color-scheme: light dark;
}

body {
    background: linear-gradient(to bottom, var(--bg-primary), var(--bg-elev-2));
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
        Ubuntu, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
    line-height: 1.6;
    transition: background-color var(--transition-med), color var(--transition-med),
        background var(--transition-med);
}

.top-header, footer {
    background-color: var(--bg-secondary) !important;
    color: var(--text-secondary) !important;
    border-color: var(--border-color) !important;
}

.sidebar {
    background-color: var(--bg-elev-1) !important;
    border-right: 1px solid var(--border-color) !important;
}

.sidebar-nav .nav-link {
    color: var(--text-secondary) !important;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link:focus {
    background-color: color-mix(in oklab, var(--accent-primary) 45%, transparent);
    color: var(--text-primary) !important;
}

.sidebar-nav .active-nav-link {
    background-color: color-mix(in oklab, var(--accent-primary) 70%, transparent) !important;
    color: var(--text-primary) !important;
}

.main-wrapper {
    background-color: var(--bg-secondary);
}

/* Workflows page gradient background */
body.workflows-page .main-wrapper {
    background: linear-gradient(
        to bottom,
        color-mix(in oklab, var(--bg-primary) 100%, transparent) 0%,
        color-mix(in oklab, var(--accent-primary) 10%, var(--bg-secondary)) 35%,
        color-mix(in oklab, var(--accent-secondary) 8%, var(--bg-secondary)) 100%
    );
}

/* Cards */
.card, .card-base, .panel, .box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast),
        background-color var(--transition-med), border-color var(--transition-med);
}

.card:hover, .card-base:hover, .panel:hover, .box:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card .card-header, .panel .panel-header {
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: 0.025em;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    background: linear-gradient(to bottom, var(--bg-card), color-mix(in oklab, var(--bg-card) 85%, var(--bg-elev-2)));
}

.card .card-body, .panel .panel-body {
    padding: 1.25rem 1.25rem 1.5rem;
}

/* Subtle gradient for dashboard cards */
.card-gradient {
    background: linear-gradient(
        to bottom right,
        color-mix(in oklab, var(--bg-card) 92%, var(--accent-primary)),
        color-mix(in oklab, var(--bg-card) 96%, var(--accent-secondary))
    );
}

/* Buttons */
.btn, button, .button {
    border-radius: var(--radius-sm) !important;
    transition: background-color var(--transition-fast), color var(--transition-fast),
        box-shadow var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}

.btn-primary, .button-primary {
    background-color: var(--accent-blue-600) !important;
    border-color: var(--accent-blue-600) !important;
    color: white !important;
}

.btn-primary:hover, .button-primary:hover {
    filter: brightness(0.95);
    box-shadow: var(--shadow-sm);
}

.btn-outline-light {
    color: var(--text-secondary) !important;
    border-color: var(--border-color) !important;
}

.btn-outline-light:hover {
    background-color: color-mix(in oklab, var(--accent-primary) 40%, transparent);
}

/* Forms */
input[type="text"],
input[type="password"],
input[type="email"],
textarea,
select {
    background-color: var(--bg-elev-1);
    color: var(--text-primary);
    border: 1px solid var(--input-border-color);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: color-mix(in oklab, var(--accent-primary) 60%, var(--input-border-color));
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent-primary) 25%, transparent);
}

/* Toasts */
#toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 1080;
}

.toast {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transform: translateX(100%);
    opacity: 0;
    animation: toast-in 300ms var(--transition-fast) forwards;
}

.toast.success { border-left: 4px solid var(--accent-success); }
.toast.error { border-left: 4px solid var(--accent-error); }
.toast.info { border-left: 4px solid var(--accent-info); }

.toast .toast-header {
    background: var(--bg-elev-1);
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

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

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

/* Utilities */
.elevate-1 { box-shadow: var(--shadow-sm); }
.elevate-2 { box-shadow: var(--shadow-md); }
.rounded-md { border-radius: var(--radius-md); }
.muted { color: var(--text-muted) !important; }

/* Accessibility */
:focus-visible {
    outline: 3px solid color-mix(in oklab, var(--accent-primary) 50%, transparent);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

/* Responsive Layout Helpers */
.container-fluid, .container {
    padding-left: 1rem;
    padding-right: 1rem;
}

.grid-auto {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

@media (min-width: 768px) {
    .grid-auto { gap: 1.25rem; }
}

@media (min-width: 1024px) {
    .grid-auto { gap: 1.5rem; }
}

/* Icon styling */
.icon { width: 24px; height: 24px; stroke-width: 1.5; }
.icon-accent { color: var(--accent-blue-600); }
.icon:hover { transform: scale(1.05); filter: brightness(1.05); transition: transform var(--transition-fast), filter var(--transition-fast); }

/* Hero banner */
.hero-banner {
    position: relative;
    background: linear-gradient(90deg,
        color-mix(in oklab, var(--accent-secondary) 55%, var(--bg-secondary)),
        color-mix(in oklab, var(--accent-primary) 55%, var(--bg-secondary)) 50%,
        color-mix(in oklab, var(--accent-tertiary) 55%, var(--bg-secondary)) 100%);
    color: var(--text-primary);
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.hero-banner .display-5 {
    color: var(--text-primary);
}

.hero-banner p { color: var(--text-secondary); }

.hero-banner .btn-primary {
    background-color: var(--accent-blue-600) !important;
    border-color: var(--accent-blue-600) !important;
}

.hero-banner .btn-primary:hover { filter: brightness(0.95); }

/* Basic styles - add more later */
body {
    font-family: sans-serif;
    margin: 20px;
    line-height: 1.6;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 10px;
}

footer {
    margin-top: 40px;
    font-size: 0.8em;
    text-align: center;
}

/* Chat interface specific styles */
.chat-container {
    height: 100vh;
    overflow: hidden;
}

.chat-layout {
    display: flex;
    height: 100vh;
}

/* Override body margins for chat pages */
body.chat-page {
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body.chat-page .main-content {
    min-height: auto;
}

/* Hide footer on chat page */
body.chat-page footer {
    display: none;
}

/* Enhanced Flash Message Styles */
.alert {
    border: none;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    animation: slideInDown 0.5s ease-out;
    margin-bottom: 1rem;
}

.alert-success {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    border-left: 4px solid #155724;
}

.alert-danger {
    background: linear-gradient(135deg, #dc3545, #e74c3c);
    color: white;
    border-left: 4px solid #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, #ffc107, #fd7e14);
    color: var(--text-primary);
    border-left: 4px solid #856404;
}

.alert-info {
    background: linear-gradient(135deg, #17a2b8, #6f42c1);
    color: white;
    border-left: 4px solid #0c5460;
}

.alert .btn-close {
    filter: invert(1);
    opacity: 0.8;
}

.alert .btn-close:hover {
    opacity: 1;
}

/* Animation for flash messages */
@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Auto-hide animation */
.alert.auto-hide {
    animation: slideOutUp 0.5s ease-in forwards;
    animation-delay: 3s;
}

@keyframes slideOutUp {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(-100%);
        opacity: 0;
    }
}

/* Toast Notification Styles */
.toast-container {
    z-index: 1055;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    animation: slideInRight 0.3s ease-out;
}

.toast-header {
    background: linear-gradient(135deg, var(--bg-elev-1) 0%, var(--bg-elev-2) 100%);
    border-bottom: 1px solid var(--border-color);
    border-radius: 12px 12px 0 0;
    color: var(--text-primary);
}

.toast-body {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-radius: 0 0 12px 12px;
}

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

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