:root {
    --green-dark: #1B3B36;
    --green-mid: #2D5A4E;
    --green-light: #BBD1C8;
    --green-pale: #E8F0EC;
    --white: #FFFFFF;
    --grey-light: #F5F5F5;
    --grey-mid: #999;
    --grey-dark: #333;
    --red: #D32F2F;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font);
    color: var(--grey-dark);
    background: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--green-pale);
}

.logo img {
    height: 40px;
}

/* Main */
main {
    flex: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    width: 100%;
}

/* Footer */
footer {
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--grey-mid);
    border-top: 1px solid var(--green-pale);
}

footer a {
    color: var(--green-mid);
}

/* Screens */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* Typography */
h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--green-dark);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--grey-mid);
    margin-bottom: 1.5rem;
}

/* Booking type cards */
.card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.booking-card {
    background: var(--white);
    border: 2px solid var(--green-light);
    border-radius: 12px;
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
}

.booking-card:hover {
    border-color: var(--green-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(27, 59, 54, 0.1);
}

.card-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.75rem;
}

.booking-card h2 {
    font-size: 1.2rem;
    color: var(--green-dark);
    margin-bottom: 0.5rem;
}

.card-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--green-mid);
    margin-bottom: 0.5rem;
}

.card-desc {
    font-size: 0.85rem;
    color: var(--grey-mid);
}

/* Back button */
.back-btn {
    background: none;
    border: none;
    color: var(--green-mid);
    font-family: var(--font);
    font-size: 0.95rem;
    cursor: pointer;
    margin-bottom: 1rem;
    padding: 0;
}

.back-btn:hover {
    color: var(--green-dark);
}

/* Calendar */
.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.calendar-nav button {
    background: none;
    border: 1px solid var(--green-light);
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--font);
    color: var(--green-dark);
}

.calendar-nav span {
    font-weight: 600;
    font-size: 1.1rem;
    min-width: 160px;
    text-align: center;
}

.calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 1.5rem;
}

.cal-header {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--grey-mid);
    padding: 0.5rem 0;
}

.cal-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    background: var(--grey-light);
    font-family: var(--font);
    transition: all 0.15s;
}

.cal-day:hover:not(.disabled):not(.empty) {
    background: var(--green-light);
}

.cal-day.selected {
    background: var(--green-dark);
    color: var(--white);
    font-weight: 600;
}

.cal-day.disabled {
    color: var(--grey-mid);
    opacity: 0.4;
    cursor: default;
}

.cal-day.empty {
    background: transparent;
    cursor: default;
}

.cal-day.today {
    border: 2px solid var(--green-mid);
}

/* Selection summary */
.selection-summary {
    background: var(--green-pale);
    border-radius: 10px;
    padding: 1.25rem;
    margin-top: 1rem;
}

.selection-summary.hidden {
    display: none;
}

.summary-total {
    font-size: 1.2rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--green-light);
}

/* Room cards */
.room-type-select {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.room-card {
    background: var(--white);
    border: 2px solid var(--green-light);
    border-radius: 10px;
    padding: 1.25rem;
    text-align: center;
    cursor: pointer;
    font-family: var(--font);
    transition: all 0.2s;
}

.room-card:hover {
    border-color: var(--green-dark);
}

.room-card.selected {
    border-color: var(--green-dark);
    background: var(--green-pale);
}

.room-card h3 {
    color: var(--green-dark);
    margin-bottom: 0.25rem;
}

.room-card p {
    font-size: 0.85rem;
    color: var(--grey-mid);
}

/* Time slots */
.slot-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    margin-bottom: 1rem;
}

.slot-btn {
    padding: 0.6rem 0.4rem;
    border: 1px solid var(--green-light);
    border-radius: 6px;
    background: var(--white);
    cursor: pointer;
    font-size: 0.8rem;
    font-family: var(--font);
    transition: all 0.15s;
    text-align: center;
}

.slot-btn:hover:not(.unavailable) {
    border-color: var(--green-dark);
    background: var(--green-pale);
}

.slot-btn.selected {
    background: var(--green-dark);
    color: var(--white);
    border-color: var(--green-dark);
}

.slot-btn.unavailable {
    background: var(--grey-light);
    color: var(--grey-mid);
    cursor: default;
    text-decoration: line-through;
}

/* Forms */
.account-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--green-light);
}

.tab {
    flex: 1;
    padding: 0.75rem;
    background: none;
    border: none;
    font-family: var(--font);
    font-size: 1rem;
    cursor: pointer;
    color: var(--grey-mid);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}

.tab.active {
    color: var(--green-dark);
    border-bottom-color: var(--green-dark);
    font-weight: 600;
}

.account-form {
    max-width: 400px;
}

.account-form.hidden {
    display: none;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
    color: var(--green-dark);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"],
.form-group input[type="date"] {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--green-light);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font);
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--green-dark);
}

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

.form-group.checkbox label {
    margin-bottom: 0;
    font-weight: 400;
}

.form-group.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--green-dark);
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--green-dark);
    color: var(--white);
    border: none;
    border-radius: 8px;
    padding: 0.8rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    text-align: center;
    margin-top: 0.5rem;
}

.btn-primary:hover {
    background: var(--green-mid);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: default;
}

.btn-secondary {
    display: inline-block;
    background: none;
    color: var(--green-dark);
    border: 2px solid var(--green-dark);
    border-radius: 8px;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    margin-top: 0.5rem;
}

.btn-secondary:hover {
    background: var(--green-pale);
}

/* Error */
.error {
    color: var(--red);
    font-size: 0.9rem;
    margin-top: 0.75rem;
}

.error.hidden {
    display: none;
}

/* Logged in card */
.logged-in-card {
    background: var(--green-pale);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.hidden {
    display: none !important;
}

/* Processing / spinner */
.processing {
    text-align: center;
    padding: 3rem 0;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--green-light);
    border-top-color: var(--green-dark);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}

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

/* Confirmation page */
.confirmation {
    text-align: center;
    padding: 2rem 0;
}

.confirm-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--green-dark);
    color: var(--white);
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.confirm-icon.error-icon {
    background: var(--red);
}

.confirm-details {
    background: var(--green-pale);
    border-radius: 10px;
    padding: 1.25rem;
    margin: 1.5rem 0;
    text-align: left;
}

.pin-section {
    margin: 1.5rem 0;
}

.pin-section h2 {
    font-size: 1.1rem;
    color: var(--green-dark);
    margin-bottom: 0.75rem;
}

.pin-display {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--green-dark);
    background: var(--green-pale);
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
}

.pin-note {
    font-size: 0.85rem;
    color: var(--grey-mid);
    margin-top: 0.75rem;
}

.confirm-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    margin-top: 2rem;
}

/* Date input */
input[type="date"] {
    width: auto;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--green-light);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font);
}

label[for="room-date"] {
    font-weight: 500;
    margin-right: 0.5rem;
}

/* Responsive */
@media (max-width: 600px) {
    main {
        padding: 1.5rem 1rem;
    }

    .card-grid,
    .room-type-select {
        grid-template-columns: 1fr;
    }

    .slot-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    h1 {
        font-size: 1.4rem;
    }
}