/* ============================================
   The Bach Academy - Main Stylesheet
   ============================================ */

/* Import design tokens - single source of truth for all design values */
@import url('tokens.css');

/* Reset & Base Styles
   -------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* Focus Styles for Accessibility */
:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Container
   -------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* Header
   -------------------------------------------- */
.header {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
}

.header__logo {
    text-align: center;
}

.header__title {
    font-family: var(--font-primary);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
}

.header__tagline {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* Main Content
   -------------------------------------------- */
.main {
    flex: 1;
    padding: var(--spacing-2xl) 0;
}

/* Progress Bar
   -------------------------------------------- */
.progress-bar {
    margin-bottom: var(--spacing-2xl);
}

.progress-bar__list {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: var(--spacing-sm);
}

.progress-bar__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    max-width: 120px;
    position: relative;
}

.progress-bar__item::after {
    content: '';
    position: absolute;
    top: 16px;
    left: 50%;
    width: 100%;
    height: var(--size-progress-line);
    background-color: var(--color-border);
    z-index: -1;
}

.progress-bar__item:last-child::after {
    display: none;
}

.progress-bar__item--active::after,
.progress-bar__item--completed::after {
    background-color: var(--color-primary);
}

.progress-bar__number {
    width: var(--size-progress-number);
    height: var(--size-progress-number);
    border-radius: var(--radius-full);
    background-color: var(--color-border);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-base);
}

.progress-bar__item--active .progress-bar__number {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.progress-bar__item--completed .progress-bar__number {
    background-color: var(--color-success);
    color: var(--color-white);
}

.progress-bar__label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: center;
}

.progress-bar__item--active .progress-bar__label,
.progress-bar__item--completed .progress-bar__label {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
}

/* Booking Container
   -------------------------------------------- */
.booking-container {
    max-width: var(--width-booking-container);
    margin: 0 auto;
}

/* Booking Step
   -------------------------------------------- */
.booking-step {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.booking-step[hidden] {
    display: none;
}

.booking-step__title {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.booking-step__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.booking-step__actions {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.booking-step__actions .btn:only-child {
    margin-left: auto;
}

/* Instrument Grid
   -------------------------------------------- */
.instrument-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.instrument-card {
    padding: var(--spacing-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background-color: var(--color-white);
}

.instrument-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.instrument-card--selected {
    border-color: var(--color-primary);
    background-color: var(--color-primary-tint-5);
}

.instrument-card__icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.instrument-card__name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

/* Duration Options
   -------------------------------------------- */
.duration-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.duration-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.duration-card:hover {
    border-color: var(--color-primary-light);
}

.duration-card--selected {
    border-color: var(--color-primary);
    background-color: var(--color-primary-tint-5);
}

.duration-card__info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.duration-card__minutes {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.duration-card__label {
    color: var(--color-text-light);
}

.duration-card__price {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
}

.duration-travel-notice {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-md);
    font-style: italic;
}

.makeup-notice {
    background-color: var(--color-info-light);
    border: var(--border-width-thin) solid var(--color-info);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.makeup-notice__text {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    margin: 0;
    line-height: 1.5;
}

/* Date Picker
   -------------------------------------------- */
.date-picker {
    margin-bottom: var(--spacing-lg);
}

.date-picker__label {
    display: block;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-sm);
}

.date-picker__input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    width: 100%;
    max-width: 200px;
}

.help-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* Timeslot Grid
   -------------------------------------------- */
.timeslot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.timeslot-placeholder {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

.timezone-notice {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-background-alt);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.timeslot-loading {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
    font-style: italic;
}

.timeslot-card {
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.timeslot-card:hover {
    border-color: var(--color-primary-light);
}

.timeslot-card--selected {
    border-color: var(--color-primary);
    background-color: var(--color-primary);
    color: var(--color-white);
}

.timeslot-card__time {
    font-weight: var(--font-weight-semibold);
}

.timeslot-card__instructor {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.timeslot-card--selected .timeslot-card__instructor {
    color: var(--color-overlay-white-80);
}

.timeslot-card__price {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
    margin-top: var(--spacing-xs);
}

.timeslot-card--selected .timeslot-card__price {
    color: var(--color-overlay-white-90);
}

.timeslot-card__locations {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    margin-top: var(--spacing-xs);
}

.location-badge {
    display: inline-block;
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-location-badge);
    border-radius: var(--radius-lg);
    color: var(--color-text-muted);
}

.location-badge--multi {
    background-color: var(--color-location-multi);
    color: var(--color-location-multi-text);
}

.timeslot-card--selected .location-badge {
    background-color: var(--color-overlay-white-20);
    color: var(--color-overlay-white-90);
}

/* Filters
   -------------------------------------------- */
.filters-panel {
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.filters-toggle {
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-base);
    color: var(--color-text);
}

.filters-toggle:hover {
    background-color: var(--color-background-alt);
}

.filters-toggle__icon {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.filters-content {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    align-items: end;
}

.filters-content[hidden] {
    display: none;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.filter-select {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
}

/* Booking Summary
   -------------------------------------------- */
.booking-summary,
.contact-summary {
    background-color: var(--color-background-alt);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.booking-summary__title,
.contact-summary__title {
    font-family: var(--font-primary);
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.booking-summary__list {
    display: grid;
    gap: var(--spacing-sm);
}

.booking-summary__item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.booking-summary__item:last-child {
    border-bottom: none;
}

.booking-summary__item dt {
    color: var(--color-text-light);
}

.booking-summary__item dd {
    font-weight: var(--font-weight-medium);
}

.booking-summary__item--total {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-primary);
    border-bottom: none;
}

.booking-summary__item--total dt,
.booking-summary__item--total dd {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.contact-summary p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

/* Confirmation Card
   -------------------------------------------- */
.confirmation-card {
    max-width: var(--width-confirmation-card);
    margin: 0 auto;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.confirmation-card__icon {
    margin-bottom: var(--spacing-lg);
}

.confirmation-card__icon--success {
    color: var(--color-success);
}

.confirmation-card__icon--cancelled {
    color: var(--color-error);
}

.confirmation-card__title {
    font-family: var(--font-primary);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.confirmation-card__message {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.confirmation-card__actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Footer
   -------------------------------------------- */
.footer {
    background-color: var(--color-text);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer__text {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.footer__nav {
    display: flex;
    gap: var(--spacing-lg);
}

.footer__link {
    color: var(--color-white);
    font-size: var(--font-size-sm);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.footer__link:hover {
    opacity: 1;
    color: var(--color-white);
}

/* Loading Spinner
   -------------------------------------------- */
.loading-spinner {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    grid-column: 1 / -1;
}

/* Show spinner when parent has is-loading class */
.is-loading .loading-spinner {
    display: flex;
}

/* Hide form/content when loading */
.is-loading .details-form,
.is-loading .logged-in-banner,
.is-loading .student-selection > :not(.loading-spinner) {
    display: none;
}

.spinner {
    width: var(--height-spinner);
    height: var(--height-spinner);
    border: var(--border-width-thick) solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin var(--animation-spin-duration) linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Modal
   -------------------------------------------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal[hidden] {
    display: none;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background-color: var(--color-overlay-dark);
}

.modal__content {
    position: relative;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: var(--width-modal);
    width: 90%;
    text-align: center;
}

.modal__title {
    font-family: var(--font-primary);
    color: var(--color-error);
    margin-bottom: var(--spacing-md);
}

.modal__message {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* Location Picker Modal */
.modal--location-picker .modal__overlay {
    position: absolute;
    inset: 0;
    background-color: var(--color-overlay-dark);
}

.modal--location-picker .modal__content {
    max-width: var(--width-modal);
    text-align: center;
}

.modal--location-picker h3 {
    font-family: var(--font-primary);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.modal--location-picker p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.location-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.location-option {
    padding: var(--spacing-md);
    border: var(--border-width-medium) solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-family: var(--font-secondary);
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.location-option:hover {
    border-color: var(--color-primary);
    background-color: var(--color-hover-light);
}

.location-option:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Responsive Design
   -------------------------------------------- */
@media (max-width: 576px) {
    :root {
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.25rem;
    }

    .progress-bar__label {
        display: none;
    }

    .progress-bar__item {
        max-width: none;
    }

    .booking-step {
        padding: var(--spacing-lg);
    }

    .booking-step__actions {
        flex-direction: column;
    }

    .booking-step__actions .btn {
        width: 100%;
    }

    .duration-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }

    .filters-content {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) {
    .header__title {
        font-size: var(--font-size-3xl);
    }

    .footer .container {
        flex-direction: row;
        justify-content: space-between;
    }

    .confirmation-card__actions {
        flex-direction: row;
        justify-content: center;
    }
}