/* ==========================================================================
   calendar.css — Calendar feature styles
   Part of the v2.0 CSS modularization.

   Contents: carrier color classes, calendar grid, month tile, day cell,
   day-off highlights, T6 route number, schedule letter, NALC label,
   traditional view, calendar main nav (year controls), carrier color
   buttons, T6 / letter schedule inputs, user-control filter nav box,
   opacity slider, customizer UI (HSL sliders, font color buttons).
   ========================================================================== */

/* ==========================================================================
   Carrier Colors & Calendar Highlights
   ========================================================================== */
.carrier-black { background-color: var(--carrier-black-bg); color: var(--carrier-black-text); }
.carrier-yellow { background-color: var(--carrier-yellow-bg); color: var(--carrier-yellow-text); }
.carrier-blue { background-color: var(--carrier-blue-bg); color: var(--carrier-blue-text); }
.carrier-green { background-color: var(--carrier-green-bg); color: var(--carrier-green-text); }
.carrier-brown { background-color: var(--carrier-brown-bg); color: var(--carrier-brown-text); }
.carrier-red { background-color: var(--carrier-red-bg); color: var(--carrier-red-text); }
.carrier-sunday { background-color: var(--sunday-highlight-bg); color: var(--sunday-highlight-text); }

.text-calendar-heading-black { color: #000; }
.text-calendar-heading-yellow { color: #ffea00; }
.text-calendar-heading-blue { color: #1f51ff; }
.text-calendar-heading-green { color: green; }
.text-calendar-heading-brown { color: #7b3f00; }
.text-calendar-heading-red { color: red; }
.text-calendar-heading-all { color: var(--sunday-highlight-bg); }
.text-calendar-heading-none { color: var(--light-text); }
.theme-dark .text-calendar-heading-none { color: var(--dark-text); }

.day-off-highlight {
    box-shadow: inset 0 0 0 2px var(--highlight-outline-light);
}

.theme-dark .day-off-highlight {
    box-shadow: inset 0 0 0 2px var(--highlight-outline-dark);
}

/* Calendar Number & Text Specific Colors */
.calendar-day.carrier-black .day-number, .calendar-day.carrier-black .nalc-label { color: var(--carrier-black-day-cell-text); opacity: 1; }
.calendar-day.carrier-yellow .day-number, .calendar-day.carrier-yellow .nalc-label { color: var(--carrier-yellow-day-cell-text); opacity: 1; }
.calendar-day.carrier-blue .day-number, .calendar-day.carrier-blue .nalc-label { color: var(--carrier-blue-day-cell-text); opacity: 1; }
.calendar-day.carrier-green .day-number, .calendar-day.carrier-green .nalc-label { color: var(--carrier-green-day-cell-text); opacity: 1; }
.calendar-day.carrier-brown .day-number, .calendar-day.carrier-brown .nalc-label { color: var(--carrier-brown-day-cell-text); opacity: 1; }
.calendar-day.carrier-red .day-number, .calendar-day.carrier-red .nalc-label { color: var(--carrier-red-day-cell-text); opacity: 1; }
.calendar-day.carrier-sunday .day-number, .calendar-day.carrier-sunday .nalc-label { color: var(--sunday-highlight-text); opacity: 1; }

/* ==========================================================================
   Calendar Grid & Elements
   ========================================================================== */
.calendar-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0.5rem;
    min-width: 0;
}

.calendar-month-tile {
    display: flex;
    flex-direction: column;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    background-color: var(--light-card-bg);
    min-width: 0;
}

.theme-dark .calendar-month-tile {
    background-color: var(--dark-card-bg);
}

.calendar-header {
    font-weight: 700;
    font-size: 1.125rem;
    text-align: center;
    padding: 0.75rem 0;
    height: auto;
    position: relative;
    color: #fff;
}

.calendar-header-accent-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--accent-red);
    height: 2px;
}

.calendar-day-names,
.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar-day-names {
    text-align: center;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

.theme-dark .calendar-day-names {
    border-bottom-color: var(--border-dark);
}

.calendar-day,
.calendar-days {
    flex-grow: 1;
}

.calendar-day {
    display: block;
    position: relative;
    min-height: 40px;
    aspect-ratio: 1/1;
    padding: clamp(4px, 1.5vw, 6px);
    box-sizing: border-box;
    cursor: pointer;
    border-radius: 0.5rem;
    transition: background-color 0.15s ease, color 0.15s ease;
    flex-shrink: 0;
}

.calendar-day:hover:not(.day-off-highlight) {
    background-color: rgba(0, 0, 0, 0.05);
}

.theme-dark .calendar-day:hover:not(.day-off-highlight) {
    background-color: rgba(255, 255, 255, 0.05);
}

.calendar-day .day-number,
.event-icon-container {
    position: absolute;
    top: clamp(4px, 1.5vw, 6px);
    z-index: 2;
}

.calendar-day .day-number {
    right: clamp(4px, 1.5vw, 6px);
    font-weight: 700;
    font-size: clamp(0.8rem, 3vw, 1.1rem);
}

.event-icon-container {
    left: clamp(4px, 1.5vw, 6px);
    display: flex;
    gap: 2px;
}

.event-icon {
    width: clamp(0.8rem, 3.5vw, 1.6em);
    height: auto;
}

.payday-symbol,
.t6-route-number {
    position: absolute;
    bottom: clamp(4px, 1.5vw, 6px);
    z-index: 1;
}

.payday-symbol {
    right: clamp(4px, 1.5vw, 6px);
    width: clamp(1rem, 4.5vw, 2em);
}

.t6-route-number {
    left: clamp(4px, 1.5vw, 6px);
    font-weight: 700;
    font-size: clamp(0.7rem, 2.5vw, 0.9rem);
}

.schedule-letter {
    position: absolute;
    top: clamp(4px, 1.5vw, 6px);
    left: clamp(4px, 1.5vw, 6px);
    font-weight: 700;
    font-size: clamp(0.8rem, 3vw, 1.1rem);
    z-index: 2;
}

.nalc-label {
    position: absolute;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    font-size: clamp(0.6rem, 2vw, 0.75rem);
    font-weight: 700;
    color: var(--light-text);
    opacity: 0.85;
    z-index: 2;
    pointer-events: none;
}

.theme-dark .nalc-label {
    color: var(--dark-text);
}

.calendar-day.today {
    border: 2px solid var(--primary-blue) !important;
    box-shadow: 0 0 5px rgba(13, 110, 253, 0.5) !important;
}

.theme-dark .calendar-day.today {
    border-color: var(--dark-text) !important;
    box-shadow: 0 0 5px rgba(248, 248, 248, 0.5) !important;
}

.calendar-day.flash-highlight-calendar {
    animation: flash-effect 500ms ease-out 3;
}

.calendar-day.has-event-bg::before {
    content: "";
    position: absolute;
    top: 0.2em;
    left: 0.2em;
    right: 0.2em;
    bottom: 0.2em;
    background-image: var(--event-bg-image);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: var(--event-bg-opacity, 0.25);
    z-index: 0;
    border-radius: inherit;
    transition: opacity 0.3s ease-in-out;
    pointer-events: none;
}

/* Traditional View Option */
.calendar-grid.traditional-view .calendar-days {
    gap: 0;
}

.calendar-grid.traditional-view .calendar-day {
    border: 1px solid var(--border-light);
    border-radius: 0;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.05);
}

.theme-dark .calendar-grid.traditional-view .calendar-day {
    border-color: var(--border-dark);
}

.calendar-grid.traditional-view .day-off-highlight:not(.carrier-sunday) {
    background-color: transparent !important;
    color: inherit !important;
    box-shadow: inset 0 0 0 2px var(--primary-blue);
}

/* ==========================================================================
   Carrier Settings & Controls
   ========================================================================== */
.calendar-main-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 0 1rem;
    overflow-x: auto;
}

.calendar-main-nav .current-year-display,
.calendar-main-nav .nav-button {
    flex-shrink: 0;
}

.current-year-display {
    border: 1px solid var(--border-light);
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
    background-color: var(--light-bg);
    color: var(--light-text);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.theme-dark .current-year-display,
.theme-dark .settings-accordion-toggle {
    background-color: var(--dark-card-bg);
    color: var(--dark-text);
    border-color: var(--border-dark);
}

.carrier-buttons-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.theme-dark .carrier-buttons-grid {
    background-color: var(--dark-card-bg);
}

.carrier-color-button {
    flex-grow: 1;
    flex-basis: calc(25% - 1rem);
    min-width: 60px;
    height: 3rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
    white-space: nowrap;
    font-size: clamp(0.7rem, 2.5vw, 0.9rem);
}

.carrier-color-button.selected {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.theme-dark .carrier-color-button.selected {
    border-color: var(--dark-text);
}

.carrier-color-button:active {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.carrier-color-button.carrier-sunday-button {
    background-color: var(--sunday-highlight-bg);
    color: var(--sunday-highlight-text);
}

.theme-dark .carrier-color-button.carrier-black {
    border: 1px solid #fff;
}

.carrier-none {
    background-color: #fff;
    color: #333;
    border: 1px solid #ccc;
}

.theme-dark .carrier-none {
    background-color: var(--dark-bg);
    color: var(--dark-text);
    border-color: var(--border-dark);
}

.carrier-color-button.customizing {
    border-color: var(--accent-red) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.5) !important;
    transform: translateY(-2px) scale(1.05);
}

/* T6 Route & Letter Inputs */
.letter-schedule-inputs,
.t6-route-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-top: 1rem;
}

.letter-schedule-input,
.t6-route-input {
    width: 100%;
    text-align: center;
    font-weight: 700;
    border: 1px solid var(--border-light);
    border-radius: 0.375rem;
    background-color: var(--light-bg);
    color: var(--light-text);
    transition: all 0.2s ease;
    padding: 0.75rem 0.25rem;
    font-size: clamp(0.9rem, 4vw, 1.2rem);
}

.letter-schedule-input::placeholder,
.t6-route-input::placeholder {
    color: var(--light-text);
    font-weight: 500;
    opacity: 0.6;
}

.theme-dark .letter-schedule-input,
.theme-dark .t6-route-input {
    background-color: var(--dark-bg);
    color: var(--dark-text);
    border-color: var(--border-dark);
}

.theme-dark .letter-schedule-input::placeholder,
.theme-dark .t6-route-input::placeholder {
    color: var(--dark-text);
    opacity: 0.7;
}

.t6-route-inputs-wrapper {
    padding: 0 0.5rem;
}

/* User Controls Nav Box */
.user-control-nav-box {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.user-control-nav-box .nav-button {
    padding: 0.5rem 0.4rem;
    font-size: clamp(0.7rem, 3vw, 0.8rem);
    flex-grow: 1;
    text-align: center;
    flex-shrink: 1;
    min-width: 0;
}

.user-control-nav-box .nav-button .short-text {
    display: none;
}

.user-control-nav-box .nav-button .full-text {
    display: inline;
}

.user-control-nav-box .nav-button.selected {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.5);
    background-color: rgba(13, 110, 253, 0.1);
}

.theme-dark .user-control-nav-box .nav-button.selected {
    border-color: var(--dark-text);
    box-shadow: 0 0 0 2px rgba(248, 248, 248, 0.5);
    background-color: rgba(248, 248, 248, 0.1);
}

/* Opacity Slider */
.opacity-slider-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 0;
    margin-top: 1rem;
}

.opacity-slider-container label {
    font-weight: 500;
}

.opacity-slider-container input[type=range] {
    flex-grow: 1;
    cursor: pointer;
}

.opacity-slider-container #opacity-value-display {
    font-weight: 600;
    min-width: 35px;
    text-align: right;
}

/* Customizer UI */
.color-customizer-ui {
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-light);
    margin-top: 0.5rem;
}

.theme-dark .color-customizer-ui {
    border-top-color: var(--border-dark);
}

.color-customizer-ui.hidden {
    display: none;
}

.color-preview-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

#color-preview-box {
    width: 30px;
    height: 30px;
    border-radius: 0.375rem;
    border: 1px solid var(--border-dark);
    flex-shrink: 0;
}

.theme-dark #color-preview-box {
    border-color: var(--border-light);
}

.sliders-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slider-group label {
    font-weight: 500;
    min-width: 15px;
}

.slider-group input[type=range] {
    flex-grow: 1;
    cursor: pointer;
}

.slider-group span {
    font-weight: 600;
    min-width: 30px;
    text-align: right;
}

#reset-colors-btn {
    width: 100%;
    margin-top: 1rem;
}

.custom-input-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
}

.custom-input-group label {
    font-weight: 500;
    white-space: nowrap;
    flex-basis: 90px;
}

.custom-input-group input[type=text] {
    padding: 0.25rem 0.5rem;
    font-size: 0.9rem;
    flex-grow: 1;
}

.font-color-group {
    margin-top: 0.5rem;
}

.font-color-options {
    display: flex;
    gap: 0.5rem;
}

.font-color-btn {
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    border: 1px solid var(--border-light);
    background-color: var(--light-bg);
    cursor: pointer;
}

.font-color-btn.selected {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.5);
}

.theme-dark .font-color-btn {
    background-color: var(--dark-card-bg);
    border-color: var(--border-dark);
}

.font-color-btn.light-btn {
    background-color: #fff;
    color: #000;
}

.font-color-btn.dark-btn {
    background-color: #333;
    color: #fff;
}