:root {
    --bg-primary: #f2f2f7;
    --bg-card: #ffffff;
    --bg-input: #f2f2f7;
    --bg-input-focus: #e8e8ed;
    --text-primary: #1c1c1e;
    --text-secondary: #8e8e93;
    --text-tertiary: #c7c7cc;
    --accent: #0A84FF;
    --accent-disabled: #a0c4ff;
    --danger: #FF3B30;
    --success: #34C759;
    --warning: #FF9500;
    --radius-card: 20px;
    --radius-input: 12px;
    --radius-button: 14px;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 20px 0;
}

.header {
    text-align: center;
    margin-bottom: 24px;
    padding-top: 20px;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.header p {
    font-size: 15px;
    color: var(--text-secondary);
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-card);
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border-radius: var(--radius-input);
    padding: 0 16px;
}

.input-wrapper .currency {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-right: 8px;
}

.input-wrapper input[type="number"],
.input-wrapper input[type="text"] {
    width: 100%;
    padding: 16px 0;
    font-size: 20px;
    font-weight: 600;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
}

.input-wrapper input::placeholder {
    color: var(--text-tertiary);
}

/* --- Категории (редактируемые) --- */
.categories-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.categories-header label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-add-category {
    background: none;
    border: none;
    color: var(--accent);
    font-size: 22px;
    font-weight: 600;
    cursor: pointer;
    padding: 0 4px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--bg-primary);
}

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

.category-item .emoji-picker {
    font-size: 24px;
    cursor: pointer;
    width: 36px;
    text-align: center;
    user-select: none;
}

.category-item .cat-name {
    flex: 1;
    min-width: 0;
}

.category-item .cat-name input {
    width: 100%;
    padding: 6px 8px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    background: var(--bg-input);
    border-radius: 8px;
    outline: none;
    font-family: inherit;
}

.category-item .cat-name input:focus {
    background: var(--bg-input-focus);
}

.category-item .cat-percent {
    display: flex;
    align-items: center;
    gap: 4px;
}

.category-item .cat-percent input {
    width: 52px;
    padding: 6px 8px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    border: none;
    background: var(--bg-input);
    border-radius: 8px;
    outline: none;
    font-family: inherit;
}

.category-item .cat-percent input:focus {
    background: var(--bg-input-focus);
}

.category-item .cat-percent span {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.category-item .btn-remove {
    background: none;
    border: none;
    color: var(--danger);
    font-size: 20px;
    cursor: pointer;
    padding: 0 4px;
    opacity: 0.6;
}

.category-item .btn-remove:active {
    opacity: 1;
}

.total-percent {
    display: flex;
    justify-content: space-between;
    padding: 12px 0 4px;
    font-size: 14px;
    font-weight: 600;
}

.total-percent .ok { color: var(--success); }
.total-percent .err { color: var(--danger); }

/* --- Шаг округления --- */
.rounding-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.rounding-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.rounding-group select {
    flex: 1;
    padding: 10px 12px;
    font-size: 15px;
    font-weight: 500;
    background: var(--bg-input);
    border: none;
    border-radius: 10px;
    outline: none;
    font-family: inherit;
    color: var(--text-primary);
    cursor: pointer;
}

.btn {
    width: 100%;
    padding: 16px;
    font-size: 17px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-button);
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:active {
    transform: scale(0.97);
    opacity: 0.8;
}

.btn-primary:disabled {
    background: var(--accent-disabled);
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--accent);
    margin-top: 12px;
}

.btn-secondary:active {
    transform: scale(0.97);
    opacity: 0.8;
}

.result {
    display: none;
}

.result.show {
    display: block;
}

.result-header {
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    padding-top: 8px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--bg-primary);
}

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

.result-item .left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-item .icon {
    font-size: 22px;
}

.result-item .info .name {
    font-size: 15px;
    font-weight: 500;
}

.result-item .info .percent {
    font-size: 12px;
    color: var(--text-secondary);
}

.result-item .amount {
    font-size: 17px;
    font-weight: 700;
}

.result-item.remainder .amount {
    color: var(--warning);
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.loading.show {
    display: block;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-primary);
    border-top: 4px solid var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

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

.error {
    display: none;
    text-align: center;
    padding: 20px;
    color: var(--danger);
}

.error.show {
    display: block;
}

.error-icon {
    font-size: 40px;
    margin-bottom: 8px;
}

.footer {
    text-align: center;
    padding: 20px;
    font-size: 12px;
    color: var(--text-tertiary);
}

@supports (padding: max(0px)) {
    body {
        padding-left: max(20px, env(safe-area-inset-left));
        padding-right: max(20px, env(safe-area-inset-right));
        padding-bottom: max(20px, env(safe-area-inset-bottom));
    }
}

.header-top {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.btn-back {
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    padding: 6px 0;
}

.btn-back:active {
    opacity: 0.7;
}

.btn-link {
    display: block;
    text-align: center;
    padding: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    margin-top: 4px;
    border-radius: var(--radius-button);
    background: transparent;
}

.btn-link:active {
    background: var(--bg-input);
}