:root {
    --bg-color: #fcfcfd;
    --panel-bg: rgba(255, 255, 255, 0.7);
    --border-color: rgba(0, 0, 0, 0.08);
    --text-main: #2d3748;
    --text-muted: #718096;
    --accent-color: #3182ce;
    --accent-glow: rgba(49, 130, 206, 0.2);
    --success-color: #38a169;
    --danger-color: #e53e3e;
    --font-family: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: radial-gradient(circle at top right, #edf2f7, var(--bg-color));
    color: var(--text-main);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    line-height: 1.6;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    animation: fadeInDown 0.8s ease;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, #3182ce, #805ad5);
    /* Webkit prefix required for text gradient fallback */
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

main {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .app-container {
        padding: 1rem;
        gap: 1rem;
    }

    header h1 {
        font-size: 1.8rem;
    }

    header p {
        font-size: 0.9rem;
    }

    #calendar-container,
    .data-panel {
        padding: 0.8rem;
        border-radius: 12px;
    }

    /* FullCalendar mobile tweaks */
    .fc .fc-toolbar {
        flex-direction: column;
        gap: 0.8rem;
    }

    .fc .fc-toolbar-title {
        font-size: 1.1rem;
        text-align: center;
    }

    .fc .fc-button {
        padding: 0.4rem 0.6rem;
        font-size: 0.85rem;
    }

    .fc .fc-col-header-cell-cushion {
        font-size: 0.75rem;
        padding: 4px 2px !important;
    }

    .stock-meta {
        flex-direction: column;
        gap: 4px;
    }
}

/* Glassmorphism Panels */
#calendar-container,
.data-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    animation: fadeIn 1s ease;
}

/* Calendar Customization */
.fc {
    --fc-border-color: var(--border-color);
    --fc-page-bg-color: transparent;
    --fc-neutral-bg-color: rgba(0, 0, 0, 0.01);
    --fc-today-bg-color: rgba(49, 130, 206, 0.08);
}

.fc-theme-standard .fc-scrollgrid {
    border-radius: 12px;
    overflow: hidden;
}

.holiday-cell {
    background-color: rgba(229, 62, 62, 0.08) !important;
}

.fc .fc-toolbar-title {
    font-weight: 600;
    font-size: 1.4rem;
    color: var(--text-main);
}

.fc .fc-button-primary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    text-transform: capitalize;
    transition: all 0.3s ease;
}

.fc .fc-button-primary:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 0 10px var(--accent-glow);
}

.fc .fc-button-primary:not(:disabled).fc-button-active,
.fc .fc-button-primary:not(:disabled):active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.fc-daygrid-day-number {
    color: var(--text-main);
    font-weight: 500;
}

/* Weekend Coloring */
.fc-day-sat,
.fc-day-sun {
    background-color: rgba(0, 0, 0, 0.015) !important;
}

.fc-day-sat .fc-col-header-cell-cushion,
.fc-day-sun .fc-col-header-cell-cushion {
    color: #e53e3e !important;
    /* Visual cue for holidays/weekends */
}

/* FullCalendar Events */
.fc-event {
    border: none;
    border-radius: 4px;
    padding: 2px 4px;
    font-size: 0.82em;
    font-weight: 600;
    transition: transform 0.2s ease;
    cursor: default;
    overflow: hidden;
}

.fc-event:hover {
    transform: scale(1.02);
}


.event-stock {
    background: linear-gradient(90deg, rgba(49, 130, 206, 0.1), rgba(49, 130, 206, 0.2)) !important;
    border-left: 5px solid var(--accent-color) !important;
    color: var(--text-main) !important;
    /* Synced with panel name color */
    font-weight: 600;
}

.event-stock .fc-event-title,
.event-stock .fc-event-main {
    background: transparent !important;
    color: inherit !important;
}

.event-sum {
    background: rgba(0, 0, 0, 0.02) !important;
    color: var(--success-color) !important;
    /* Synced with panel price color */
    font-weight: 800 !important;
    text-align: right;
    padding: 4px 8px !important;
    margin-top: 4px;
    border-top: 1px dotted var(--border-color);
    font-size: 0.85em !important;
}

.event-sum .fc-event-title,
.event-sum .fc-event-main {
    background: transparent !important;
    color: inherit !important;
}

/* Data Panel Settings */
.data-panel h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* Logic Selector Styling */
.logic-selector-container {
    margin-bottom: 2rem;
    padding: 1.2rem;
    background: rgba(49, 130, 206, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.logic-question {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.logic-options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.logic-option {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.2s;
    user-select: none;
}

.logic-option:hover {
    color: var(--accent-color);
}

.logic-option input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
    flex-shrink: 0;
}

.logic-option input[type="radio"]:checked {
    border-color: var(--accent-color);
    background: white;
}

.logic-option input[type="radio"]:checked::after {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-color);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.loading {
    color: var(--accent-color);
    font-style: italic;
    animation: pulse 1.5s infinite;
}

.stock-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* Stock Item Design */
.stock-item {
    display: flex;
    align-items: center;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.stock-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-color);
    transform: translateY(-2px);
}

/* Custom Checkbox */
.stock-item input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    margin-right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.stock-item input[type="checkbox"]:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-glow);
}

.stock-item input[type="checkbox"]:checked::after {
    content: '✓';
    color: #fff;
    font-size: 12px;
    font-weight: bold;
}

.stock-info {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.stock-name {
    font-weight: 600;
    color: var(--text-main);
    font-size: 1rem;
}

.stock-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    margin-top: 4px;
}

.stock-price {
    color: var(--success-color);
    font-weight: 500;
}

footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: auto;
    padding-top: 1rem;
}

/* Keyframes */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        opacity: 0.6;
    }

    50% {
        opacity: 1;
    }

    100% {
        opacity: 0.6;
    }
}