:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-button-color: #2aabee;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f4f4f5;
    --tg-theme-hint-color: #707579;
    --tg-theme-link-color: #2aabee;
    --tg-theme-header-bg-color: #4f545c;
    --tg-theme-accent-text-color: #2aabee;
    --tg-theme-section-bg-color: #f4f4f5;
    --tg-theme-section-header-text-color: #707579;
    --tg-theme-subtitle-text-color: #707579;
    --tg-theme-destructive-text-color: #ff3b30;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    line-height: 1.5;
    padding: 16px;
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

h2 {
    font-size: 18px;
    margin: 20px 0 10px;
}

.tariffs {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.tariff-card {
    flex: 1;
    min-width: 100px;
    padding: 16px 12px;
    border-radius: 12px;
    background: var(--tg-theme-secondary-bg-color);
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.tariff-card.selected {
    border-color: var(--tg-theme-button-color);
    background: rgba(42, 171, 238, 0.1);
}

.tariff-card h3 {
    font-size: 16px;
    margin-bottom: 4px;
}

.tariff-card p {
    font-size: 14px;
    color: var(--tg-theme-hint-color);
}

.best-value {
    position: absolute;
    top: 0;
    right: -20px;
    background: #ff9500;
    color: white;
    font-size: 10px;
    padding: 2px 24px;
    transform: rotate(45deg);
    transform-origin: center;
    width: 80px;
    text-align: center;
    margin-top: 10px;
}

.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
}

input[type="text"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #e1e3e6;
    border-radius: 10px;
    font-size: 16px;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.char-counter {
    text-align: right;
    font-size: 13px;
    color: var(--tg-theme-hint-color);
    margin-top: 4px;
}

.char-counter.warning {
    color: var(--tg-theme-destructive-text-color);
}

.contact-input .telegram-input {
    position: relative;
    display: flex;
    align-items: center;
}

.contact-prefix {
    position: absolute;
    left: 12px;
    color: var(--tg-theme-hint-color);
    pointer-events: none;
}

.contact-input input {
    padding-left: 24px;
    width: 100%;
}

/* Hide number input arrows */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

/* Custom select arrow */
select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 36px;
}

/* Focus states */
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
    box-shadow: 0 0 0 2px rgba(42, 171, 238, 0.2);
}

/* Error state */
input:invalid,
select:invalid,
textarea:invalid {
    border-color: var(--tg-theme-destructive-text-color);
}

/* Hide the main button initially - it will be controlled by Telegram WebApp */
#main-button {
    display: none;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .tariffs {
        flex-direction: column;
    }
    
    .tariff-card {
        width: 100%;
    }
}