:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2481cc;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f4f4f5;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
}

header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--tg-theme-text-color);
}

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

/* Menu */
.menu {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.calc-btn {
    background: var(--tg-theme-secondary-bg-color);
    border: none;
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.calc-btn:active {
    transform: scale(0.98);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.calc-btn .icon {
    font-size: 32px;
}

.calc-btn .title {
    font-size: 14px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
}

/* Calculator */
.calculator {
    animation: slideIn 0.3s ease;
}

.calculator.hidden {
    display: none;
}

.menu.hidden {
    display: none;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.calc-header {
    margin-bottom: 24px;
}

.back-btn {
    background: var(--tg-theme-secondary-bg-color);
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 14px;
    color: var(--tg-theme-link-color);
    cursor: pointer;
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.back-btn:active {
    transform: scale(0.98);
}

.calc-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--tg-theme-text-color);
}

.calc-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Input Group */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
}

.input-group input,
.input-group select {
    background: var(--tg-theme-secondary-bg-color);
    border: 2px solid transparent;
    border-radius: 10px;
    padding: 14px;
    font-size: 16px;
    color: var(--tg-theme-text-color);
    transition: all 0.2s ease;
    width: 100%;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
    background: var(--tg-theme-bg-color);
}

.input-group input::placeholder {
    color: var(--tg-theme-hint-color);
}

/* Result */
.result {
    background: linear-gradient(135deg, var(--tg-theme-button-color), #1a6bb3);
    border-radius: 16px;
    padding: 24px;
    margin-top: 20px;
    color: white;
    box-shadow: 0 4px 16px rgba(36, 129, 204, 0.3);
    animation: fadeIn 0.3s ease;
}

.result.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    opacity: 0.9;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.result-item:last-child {
    border-bottom: none;
}

.result-item .label {
    font-size: 14px;
    opacity: 0.9;
}

.result-item .value {
    font-size: 18px;
    font-weight: 700;
}

.result-total {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-total .label {
    font-size: 16px;
    font-weight: 600;
}

.result-total .value {
    font-size: 24px;
    font-weight: 700;
}

.result-status {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 12px;
    background: rgba(255, 255, 255, 0.2);
}

.result-status.positive {
    background: rgba(76, 217, 100, 0.3);
}

.result-status.negative {
    background: rgba(255, 59, 48, 0.3);
}

/* Schedule Table */
.schedule-table {
    margin-top: 16px;
}

.schedule-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 14px;
}

.schedule-row:last-child {
    border-bottom: none;
}

.schedule-row .number {
    font-weight: 600;
    min-width: 30px;
}

.schedule-row .date {
    flex: 1;
    text-align: center;
}

.schedule-row .amount {
    font-weight: 600;
    text-align: right;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 16px;
    }

    .menu {
        gap: 10px;
    }

    .calc-btn {
        padding: 16px;
    }

    .calc-btn .icon {
        font-size: 28px;
    }

    .calc-btn .title {
        font-size: 13px;
    }

    header h1 {
        font-size: 24px;
    }

    .result {
        padding: 20px;
    }
}

/* Dark theme support */
@media (prefers-color-scheme: dark) {
    :root {
        --tg-theme-bg-color: #1c1c1e;
        --tg-theme-text-color: #ffffff;
        --tg-theme-hint-color: #8e8e93;
        --tg-theme-link-color: #0a84ff;
        --tg-theme-button-color: #0a84ff;
        --tg-theme-button-text-color: #ffffff;
        --tg-theme-secondary-bg-color: #2c2c2e;
    }
}