/* General Resets and Base Styles */
:root {
    /* Color Palette - Light Mode Defaults */
    --primary-bg: #f0f2f5;           /* Light grey background */
    --secondary-bg: #ffffff;         /* White card/modal background */
    --text-color: #333333;           /* Dark grey text */
    --text-light: #666666;           /* Lighter grey text */
    --border-color: #e0e0e0;         /* Light grey borders */
    --primary-color: #007bff;        /* Blue for primary actions/links */
    --secondary-color: #6c757d;      /* Grey for secondary actions */
    --success-color: #28a745;        /* Green for positive changes */
    --danger-color: #dc3545;         /* Red for negative changes */
    --warning-color: #ffc107;        /* Yellow for warnings */
    --accent-color: #17a2b8;         /* Teal for accents */

    /* Dark Mode variables (will be overridden by dark-mode.css or JS) */
    --dark-primary-bg: #1a1a2e;
    --dark-secondary-bg: #21213e;
    --dark-text-color: #e0e0e0;
    --dark-text-light: #aaaaaa;
    --dark-border-color: #3a3a5e;

    /* Emergency Alert Colors */
    --emergency-bg: rgba(0, 0, 0, 0.9); /* Dark overlay */
    --emergency-card-bg: #ff4d4f; /* Bright red */
    --emergency-text: #ffffff;
    --emergency-glow: rgba(255, 77, 79, 0.7);
}

/* Dark Mode specific variables (these will be applied when .dark-mode class is active) */
.dark-mode {
    --primary-bg: var(--dark-primary-bg);
    --secondary-bg: var(--dark-secondary-bg);
    --text-color: var(--dark-text-color);
    --text-light: var(--dark-text-light);
    --border-color: var(--dark-border-color);
}


/* Basic Resets */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--primary-bg);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex; /* For sticky footer or overall layout */
    flex-direction: column;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    max-width: 1400px; /* Max width for the app content */
    margin: 0 auto;
    padding: 15px; /* Padding around the main app container */
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    margin-bottom: 0.8em;
    color: var(--text-color);
}

h1 { font-size: 2.2em; }
h2 { font-size: 1.8em; }
h3 { font-size: 1.4em; }

input[type="text"],
input[type="number"],
select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    font-size: 0.95em;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

button, .btn {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.95em;
    transition: background-color 0.2s ease, transform 0.1s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: #5a6268;
    transform: translateY(-1px);
}

.btn-file {
    padding: 8px 12px; /* Slightly smaller for file input button */
}


/* Header Styles */
.app-header {
    background-color: var(--secondary-bg);
    padding: 20px 25px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
    gap: 15px;
}

.header-top h1 {
    margin-bottom: 0;
    color: var(--primary-color);
    font-size: 2em; /* Adjusted for better fit */
}

.header-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.header-controls {
    display: flex;
    flex-wrap: wrap; /* Allow controls to wrap */
    gap: 15px;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap; /* Allow group items to wrap */
}

.control-group label {
    font-weight: 500;
    color: var(--text-light);
}

.control-group input[type="number"] {
    width: 80px; /* Fixed width for number inputs */
    text-align: center;
}

.control-group.checkbox-group {
    gap: 5px;
}
.control-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color); /* Theme checkbox */
}

/* Main Content Area */
.main-content {
    flex-grow: 1; /* Allow main content to take available space */
    margin-bottom: 20px;
}

.coin-list-controls {
    background-color: var(--secondary-bg);
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    justify-content: flex-end; /* Align to right */
}

.coin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); /* Responsive grid */
    gap: 20px;
}

.coin-card {
    background-color: var(--secondary-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid var(--border-color);
}

.coin-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.coin-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.coin-symbol {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--primary-color);
}

/* Specific Toggle Styling */
.coin-alert-toggles {
    display: flex;
    gap: 10px; /* Space between the two toggles */
}

.coin-alert-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
}

.coin-alert-toggle input[type="checkbox"] {
    position: relative;
    width: 40px;
    height: 22px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    outline: none;
    background-color: var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: background-color 0.2s;
    flex-shrink: 0; /* Prevent toggle from shrinking */
}

.coin-alert-toggle input[type="checkbox"]:checked {
    background-color: var(--success-color);
}

.coin-alert-toggle input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: #fff;
    top: 2px;
    left: 2px;
    transition: transform 0.2s;
}

.coin-alert-toggle input[type="checkbox"]:checked::before {
    transform: translateX(18px);
}

.coin-alert-toggle input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}


.coin-price {
    font-size: 1.8em;
    font-weight: 700;
    margin-bottom: 5px;
}

.coin-change {
    font-size: 1.2em;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 8px;
}

.coin-change.positive {
    color: var(--success-color);
}

.coin-change.negative {
    color: var(--danger-color);
}

.coin-details {
    font-size: 0.9em;
    color: var(--text-light);
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--border-color);
}

.coin-details p {
    margin-bottom: 5px;
}

.specific-alert-inputs {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}
.specific-alert-inputs input {
    width: 100%;
    max-width: 150px; /* Limit width */
}
.specific-alert-inputs input:disabled {
    background-color: var(--primary-bg); /* Lighter background for disabled */
    cursor: not-allowed;
}


.loading-message {
    grid-column: 1 / -1; /* Span across all columns */
    text-align: center;
    padding: 50px 0;
    font-size: 1.2em;
    color: var(--text-light);
}

/* Footer Styles */
.app-footer {
    background-color: var(--secondary-bg);
    padding: 15px 25px; /* Reduced top/bottom padding */
    border-radius: 8px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.03);
    margin-top: auto; /* Push footer to the bottom */
    display: flex; /* Flex container for better alignment */
    flex-direction: column; /* Stack status and history */
    gap: 15px; /* Space between sections */
}

.footer-status {
    display: flex; /* Flex for connection status items */
    align-items: center;
    justify-content: flex-start; /* Align to left */
    font-size: 0.9em;
    color: var(--text-light);
    gap: 8px; /* Space between items */
}

.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    /* Removed margin-right: 5px; as gap handles it */
    vertical-align: middle;
}

.status-indicator.connected {
    background-color: var(--success-color);
}

.status-indicator.disconnected {
    background-color: var(--danger-color);
}

.status-indicator.connecting {
    background-color: var(--warning-color);
    animation: pulse 1.5s infinite ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.7; }
    50% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(0.8); opacity: 0.7; }
}

.alert-history-container {
    /* Removed margin-top and padding-top here as gap in .app-footer handles spacing */
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

.alert-history-container h3 {
    text-align: center;
    margin-bottom: 15px;
    color: var(--primary-color);
}

#alert-history {
    list-style: none;
    max-height: 250px; /* Scrollable history */
    overflow-y: auto;
    padding-right: 10px; /* Space for scrollbar */
}

#alert-history li {
    background-color: rgba(0, 123, 255, 0.08); /* Light blue for alert entries */
    border: 1px solid rgba(0, 123, 255, 0.2);
    border-radius: 5px;
    padding: 10px 15px;
    margin-bottom: 8px;
    font-size: 0.9em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    color: var(--text-color);
    word-break: break-word; /* Prevent long words from overflowing */
}
#alert-history li.no-alerts-yet {
    background-color: transparent;
    border: none;
    text-align: center;
    color: var(--text-light);
}


#alert-history li .dismiss-btn {
    background-color: var(--secondary-color);
    color: white;
    padding: 5px 10px;
    font-size: 0.8em;
    white-space: nowrap; /* Prevent "Dismiss" from wrapping */
}

#alert-history li .dismiss-btn:hover {
    background-color: #495057;
}


/* Modal Styles */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1000; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0, 0, 0, 0.6); /* Black w/ opacity */
    justify-content: center;
    align-items: center;
}

.modal.open {
    display: flex; /* Show when open */
}

.modal-content {
    background-color: var(--secondary-bg);
    margin: auto;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 600px;
    position: relative;
    color: var(--text-color);
    animation: fadeIn 0.3s ease-out;
}

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

.modal-content h2 {
    margin-top: 0;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.modal-body {
    padding: 15px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-body .control-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

.modal-body .control-group label {
    width: 100%;
    margin-bottom: 5px;
}

.modal-body .control-group input[type="number"],
.modal-body .control-group select {
    width: 100%; /* Full width within modal */
    max-width: 250px; /* Keep it reasonable */
}

.modal-body .control-group .preset-btn {
    margin-top: 10px;
    margin-right: 10px;
}

.modal-body .help-text {
    font-size: 0.85em;
    color: var(--text-light);
    margin-top: 5px;
}


.modal-footer {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
    text-align: right;
}

.close-button {
    position: absolute;
    top: 15px;
    right: 25px;
    color: var(--text-light);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-button:hover,
.close-button:focus {
    color: var(--danger-color);
    text-decoration: none;
}


/* Utility Classes */
.positive {
    color: var(--success-color);
}

.negative {
    color: var(--danger-color);
}

/* Emergency Alert Overlay Styles */
.emergency-alert-overlay {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--emergency-bg); /* Dark, semi-transparent background */
    z-index: 2000; /* Higher than other modals */
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px); /* Soft blur effect */
    animation: fadeInOverlay 0.3s ease-out;
}

.emergency-alert-overlay.open {
    display: flex; /* Show when alert is active */
}

.emergency-alert-content {
    background-color: var(--emergency-card-bg); /* Bright, alarming red */
    color: var(--emergency-text);
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 0 40px var(--emergency-glow); /* Glowing effect */
    max-width: 500px;
    width: 90%;
    position: relative;
    border: 3px solid var(--emergency-text);
    animation: popIn 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55); /* Bouncy animation */
}

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

@keyframes popIn {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.emergency-alert-content .emergency-close-button {
    position: absolute;
    top: 15px;
    right: 25px;
    color: var(--emergency-text);
    font-size: 36px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s ease;
}

.emergency-alert-content .emergency-close-button:hover {
    color: #ffd700; /* Gold color on hover for close */
}

.emergency-alert-content .alert-icon {
    font-size: 4em;
    margin-bottom: 20px;
    color: #ffeb3b; /* Yellow icon for warning */
    animation: pulseIcon 1.5s infinite;
}

@keyframes pulseIcon {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

#emergency-alert-symbol {
    font-size: 3em;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--emergency-text);
    text-shadow: 2px 2px 5px rgba(0,0,0,0.3);
}

#emergency-alert-message {
    font-size: 1.8em;
    margin-bottom: 15px;
    font-weight: 500;
}

.alert-details {
    font-size: 1.2em;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 25px;
}

.dismiss-emergency-alert {
    background-color: var(--emergency-text); /* White button */
    color: var(--emergency-card-bg); /* Red text */
    font-weight: 700;
    padding: 12px 30px;
    font-size: 1.2em;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: background-color 0.2s, transform 0.2s;
}

.dismiss-emergency-alert:hover {
    background-color: #f0f0f0;
    transform: translateY(-2px);
}


/* Responsive Adjustments */
@media (max-width: 992px) {
    .coin-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    .header-top h1 {
        font-size: 1.8em;
    }
    .app-header, .app-footer {
        padding: 15px 20px;
    }
    #emergency-alert-symbol {
        font-size: 2.5em;
    }
    #emergency-alert-message {
        font-size: 1.5em;
    }
}

@media (max-width: 768px) {
    #app {
        padding: 10px;
    }
    .header-top {
        flex-direction: column;
        align-items: flex-start;
    }
    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }
    .header-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .control-group {
        width: 100%; /* Full width for controls in header */
        justify-content: space-between;
    }
    .control-group label {
        white-space: nowrap;
    }
    .coin-list-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .coin-list-controls label {
        width: 100%;
    }
    .coin-grid {
        grid-template-columns: 1fr; /* Single column on very small screens */
    }
    .header-top h1 {
        font-size: 1.6em;
    }
    .emergency-alert-content {
        padding: 30px;
    }
    .emergency-alert-content .alert-icon {
        font-size: 3em;
    }
    #emergency-alert-symbol {
        font-size: 2em;
    }
    #emergency-alert-message {
        font-size: 1.3em;
    }
    .alert-details {
        font-size: 1em;
    }
}

@media (max-width: 480px) {
    .header-top h1 {
        font-size: 1.4em;
    }
    .app-header, .app-footer {
        padding: 10px 15px;
    }
    .btn {
        padding: 8px 12px;
        font-size: 0.9em;
    }
    .control-group input[type="number"],
    .control-group select {
        width: auto; /* Let content define width */
    }
    .coin-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .coin-alert-toggle {
        margin-left: auto; /* Push to right if header is column */
    }
    .emergency-alert-content {
        padding: 20px;
    }
    .emergency-alert-content .alert-icon {
        font-size: 2.5em;
    }
    #emergency-alert-symbol {
        font-size: 1.8em;
    }
    #emergency-alert-message {
        font-size: 1.1em;
    }
    .dismiss-emergency-alert {
        padding: 10px 20px;
        font-size: 1em;
    }
}