/*
File: css/style.css
Date: 2025-04-08 16:26
Description: Modernized CSS styles for the Simulated Index Dashboard with Dark Mode.
*/

/* Using Inter font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

/* Visually hidden class for accessibility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}


/* CSS Variables for Theming */
:root {
    /* Light Mode Defaults */
    --bg-primary: #f8f9fa; /* Slightly off-white */
    --bg-secondary: #ffffff; /* Card background */
    --text-primary: #212529; /* Dark grey */
    --text-secondary: #6c757d; /* Medium grey */
    --border-color: #dee2e6; /* Light grey border */
    --shadow-color: rgba(0, 0, 0, 0.05);
    --accent-color: #007bff; /* Example blue accent */
    --accent-hover: #0056b3;
    --gain-color: #28a745;
    --gain-bg: rgba(40, 167, 69, 0.1);
    --loss-color: #dc3545;
    --loss-bg: rgba(220, 53, 69, 0.1);
    --neutral-color: #6c757d;
    --neutral-bg: rgba(108, 117, 125, 0.1);
    --chart-line-default: rgba(0, 123, 255, 0.8);
    --chart-fill-default: rgba(0, 123, 255, 0.1);
    --chart-line-gain: rgba(40, 167, 69, 0.8);
    --chart-fill-gain: rgba(40, 167, 69, 0.1);
    --chart-line-loss: rgba(220, 53, 69, 0.8);
    --chart-fill-loss: rgba(220, 53, 69, 0.1);

    --font-family-base: 'Inter', sans-serif;
    --border-radius: 8px;
    --transition-speed: 0.2s;
}

/* Dark Mode Overrides */
body.dark-mode {
    --bg-primary: #1a1a1a; /* Very dark grey */
    --bg-secondary: #2c2c2c; /* Dark card background */
    --text-primary: #e9ecef; /* Light grey text */
    --text-secondary: #adb5bd; /* Medium grey text */
    --border-color: #495057; /* Darker border */
    --shadow-color: rgba(0, 0, 0, 0.2);
    --accent-color: #0d6efd; /* Slightly brighter blue */
    --accent-hover: #3b82f6;
    --gain-color: #34d399; /* Brighter green */
    --gain-bg: rgba(52, 211, 153, 0.15);
    --loss-color: #f87171; /* Brighter red */
    --loss-bg: rgba(248, 113, 113, 0.15);
    --neutral-color: #9ca3af; /* Lighter grey for neutral */
    --neutral-bg: rgba(156, 163, 175, 0.15);
    --chart-line-default: rgba(13, 110, 253, 0.8);
    --chart-fill-default: rgba(13, 110, 253, 0.15);
    --chart-line-gain: rgba(52, 211, 153, 0.8);
    --chart-fill-gain: rgba(52, 211, 153, 0.15);
    --chart-line-loss: rgba(248, 113, 113, 0.8);
    --chart-fill-loss: rgba(248, 113, 113, 0.15);
}

/* Basic Reset & Body */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-family-base);
    line-height: 1.6;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Header */
.dashboard-header {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping */
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.dashboard-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-right: 1.5rem; /* Space between title and controls */
    margin-bottom: 0.5rem; /* Space below title when wrapped */
}

.controls {
    display: flex;
    flex-wrap: wrap; /* Allow control groups to wrap */
    gap: 1rem; /* Space between control groups */
    align-items: center;
}

.control-group {
    display: flex;
    gap: 0.5rem; /* Space within a control group */
}

.controls select,
.control-button {
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.controls select:focus,
.control-button:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(var(--accent-color-rgb, 0, 123, 255), 0.25); /* Requires accent color in RGB */
}


.control-button {
    background-color: var(--accent-color);
    color: white; /* Typically white text on accent buttons */
    border-color: var(--accent-color);
}

.control-button:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

#dark-mode-toggle {
     background-color: var(--bg-secondary);
     color: var(--text-secondary);
     border: 1px solid var(--border-color);
}
#dark-mode-toggle:hover {
    background-color: var(--bg-primary); /* Subtle hover */
}

/* Main Content Area */
.dashboard-main {
    flex-grow: 1;
    padding: 1.5rem;
    width: 100%;
}

/* Grid Layout */
.index-grid {
    display: grid;
    /* More dynamic column width */
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem; /* Increased gap */
}

/* Index Card Styling */
.index-card {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-color);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease, background-color var(--transition-speed) ease;
    opacity: 1; /* For animations */
    transform: scale(1); /* For animations */
}
/* Adding fade-in animation */
@keyframes fadeIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
.index-card.fade-in { animation: fadeIn 0.3s ease-out forwards; }
/* Adding fade-out animation (applied before removal via JS) */
@keyframes fadeOut { from { opacity: 1; transform: scale(1); } to { opacity: 0; transform: scale(0.95); } }
.index-card.fade-out { animation: fadeOut 0.3s ease-in forwards; }


.index-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 12px var(--shadow-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) ease;
}

.index-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    flex-grow: 1;
    margin: 0 0.5rem;
}

/* Icons (using text symbols - replace with Font Awesome/SVG classes if desired) */
.pin-icon, .drag-handle, .close-card {
    cursor: pointer;
    font-size: 1rem; /* Adjust if using font icons */
    padding: 0.3rem;
    color: var(--text-secondary);
    transition: color var(--transition-speed) ease;
    line-height: 1; /* Prevent extra space */
    border-radius: 50%; /* Make icon background circular on hover */
}
.pin-icon:hover, .drag-handle:hover, .close-card:hover {
    color: var(--accent-color);
    background-color: rgba(var(--accent-color-rgb, 0, 123, 255), 0.1); /* Needs RGB */
}
.pin-icon.pinned { color: var(--loss-color); /* Use loss color for pinned state */ }
.drag-handle { cursor: grab; font-size: 1.2rem; }
.close-card { font-size: 1.1rem; }


.index-card.pinned {
    border-left: 4px solid var(--loss-color); /* Pinned indicator */
}
.index-card.pinned .card-header {
     border-bottom-color: var(--loss-color); /* Subtle header indicator */
}


.card-body { flex-grow: 1; display: flex; flex-direction: column; }

.index-value {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1rem;
}

.current-value {
    font-size: 1.8rem; /* Larger value */
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    transition: color 0.3s ease; /* Transition color on update */
}
/* Add pulse effect on update */
.current-value.update-pulse {
    animation: pulse 0.5s ease-out;
}
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.05); } 100% { transform: scale(1); } }


.change {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    color: #fff; /* White text usually works best */
    transition: background-color var(--transition-speed) ease;
}
.change.gain { background-color: var(--gain-color); }
.change.loss { background-color: var(--loss-color); }
.change.neutral { background-color: var(--neutral-color); }

.chart-container {
    flex-grow: 1;
    min-height: 120px; /* Adjusted height */
    position: relative;
    margin-top: auto; /* Push chart to bottom */
}
.index-chart { display: block; width: 100%; height: 100%; }

/* SortableJS Styles */
.index-card.sortable-ghost { opacity: 0.5; background: var(--accent-color); }
.index-card.sortable-drag { opacity: 0.95; cursor: grabbing !important; }

/* Loading Indicator */
#loading-indicator { /* ... (same as before or enhance) ... */ }

/* Footer */
.dashboard-footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: 1rem;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}
#last-updated { margin-top: 0.5rem; font-style: italic; }


/* Responsive Adjustments */
@media (max-width: 768px) {
    .dashboard-header { flex-direction: column; align-items: flex-start; }
    .dashboard-title { margin-bottom: 1rem; }
    .controls { width: 100%; justify-content: space-between; }
    .control-group { flex-grow: 1; justify-content: center;}
    .controls select, .control-button { flex-grow: 1; text-align: center; }
    .index-grid { grid-template-columns: 1fr; gap: 1rem; } /* Stack cards */
    .dashboard-main { padding: 1rem; }
}

@media (max-width: 480px) {
    .dashboard-title { font-size: 1.4rem; }
    .current-value { font-size: 1.5rem; }
    .index-name { font-size: 1.05rem; }
    .control-group { flex-direction: column; width: 100%; } /* Stack controls vertically */
}