/* ============================================
   BOOKING PAGE — Conversational Form
   ============================================ */

.book-back {
    position: fixed;
    top: 32px;
    left: 32px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gray-500);
    z-index: 100;
    transition: color var(--duration-fast) ease;
}

.book-back:hover {
    color: var(--white);
}

.book-page {
    min-height: 100vh;
    display: flex;
    align-items: stretch;
}

.book-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    min-height: 100vh;
}

/* ---- Left: Intro ---- */
.book-intro {
    display: flex;
    align-items: center;
    padding: clamp(60px, 6vw, 100px);
    border-right: 1px solid var(--black-border);
}

.book-intro-content {
    max-width: 440px;
}

.book-label {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    opacity: 0.6;
    display: block;
    margin-bottom: 24px;
}

.book-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 400;
    line-height: 1.2;
    color: var(--white);
    margin-bottom: 20px;
}

.book-desc {
    font-size: 15px;
    color: var(--gray-400);
    line-height: 1.8;
    margin-bottom: 40px;
}

.book-promise {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.promise-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--gray-500);
}

.promise-item svg {
    color: var(--accent);
    opacity: 0.6;
    flex-shrink: 0;
}

/* ---- Right: Form ---- */
.book-form-wrap {
    display: flex;
    align-items: center;
    padding: clamp(60px, 6vw, 100px);
    position: relative;
}

.book-form {
    width: 100%;
    max-width: 480px;
    position: relative;
}

/* Progress Bar */
.form-progress {
    position: absolute;
    top: -40px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--black-border);
}

.form-progress-bar {
    height: 100%;
    background: var(--accent);
    width: 25%;
    transition: width 0.6s var(--ease-out);
}

/* Steps */
.form-step {
    display: none;
    animation: fadeInStep 0.5s var(--ease-out);
}

.form-step.active {
    display: block;
}

@keyframes fadeInStep {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-label {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gray-600);
    display: block;
    margin-bottom: 16px;
}

.step-title {
    font-family: var(--font-display);
    font-size: clamp(22px, 2.5vw, 28px);
    font-weight: 400;
    line-height: 1.3;
    color: var(--white);
    margin-bottom: 32px;
}

/* Form Fields */
.form-fields {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 32px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--gray-400);
}

.optional {
    color: var(--gray-600);
    font-weight: 400;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 300;
    color: var(--white);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--gray-800);
    padding: 12px 0;
    outline: none;
    transition: border-color var(--duration-fast) ease;
    border-radius: 0;
    -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-700);
}

.form-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    padding-right: 20px;
}

.form-group select option {
    background: var(--black-card);
    color: var(--white);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    border: 1px solid var(--gray-800);
    padding: 16px;
    border-radius: 2px;
}

.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group input[type="date"] {
    color-scheme: dark;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* Radio Cards */
.radio-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.radio-card {
    cursor: pointer;
}

.radio-card input {
    display: none;
}

.radio-card-inner {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px;
    border: 1px solid var(--gray-800);
    transition: all var(--duration-fast) ease;
}

.radio-card input:checked + .radio-card-inner {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.radio-card:hover .radio-card-inner {
    border-color: var(--gray-600);
}

.radio-card-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--white);
}

.radio-card-desc {
    font-size: 11px;
    color: var(--gray-500);
}

/* Checkbox Cards */
.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.check-card {
    cursor: pointer;
}

.check-card input {
    display: none;
}

.check-card-inner {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border: 1px solid var(--gray-800);
    font-size: 13px;
    color: var(--gray-400);
    transition: all var(--duration-fast) ease;
}

.check-card input:checked + .check-card-inner {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--white);
}

.check-card:hover .check-card-inner {
    border-color: var(--gray-600);
}

/* Navigation */
.form-nav {
    display: flex;
    gap: 12px;
}

.form-prev {
    padding: 16px 24px;
}

/* Error State */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #e54d4d;
}

.form-error {
    font-size: 11px;
    color: #e54d4d;
    margin-top: 4px;
    display: none;
}

.form-group.error .form-error {
    display: block;
}

/* Success State */
.form-success {
    display: none;
    text-align: center;
    padding: 40px 0;
    animation: fadeInStep 0.6s var(--ease-out);
}

.form-success.active {
    display: block;
}

.success-icon {
    color: var(--accent);
    margin-bottom: 24px;
}

.success-title {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 400;
    color: var(--white);
    margin-bottom: 16px;
}

.success-text {
    font-size: 14px;
    color: var(--gray-400);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 380px;
    margin-left: auto;
    margin-right: auto;
}

/* Loading State */
.btn.loading {
    pointer-events: none;
    opacity: 0.6;
}

.btn.loading span {
    opacity: 0;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .book-container {
        grid-template-columns: 1fr;
    }

    .book-intro {
        border-right: none;
        border-bottom: 1px solid var(--black-border);
        padding: 100px 32px 48px;
    }

    .book-form-wrap {
        padding: 48px 32px;
    }

    .radio-group,
    .checkbox-group {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .book-back {
        top: 20px;
        left: 20px;
    }
}