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

:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f0f0f0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    padding: 0;
    min-height: 100vh;
}

#app {
    max-width: 600px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: 72px;
}

#nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 50;
    display: flex;
    gap: 4px;
    background: var(--tg-theme-secondary-bg-color);
    padding: 8px 16px;
    padding-bottom: calc(8px + var(--tg-safe-area-inset-bottom, 0px));
    box-shadow: 0 -1px 4px rgba(0,0,0,0.1);
}

.nav-btn {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--tg-theme-hint-color);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn.active {
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

.view {
    display: none;
}

.view.active {
    display: block;
}

h2 {
    font-size: 20px;
    margin-bottom: 12px;
}

form {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

input {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 10px;
    font-size: 16px;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.2s;
}

button:active {
    opacity: 0.7;
}

form button, .btn-primary {
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

.card {
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 8px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.card-title {
    font-weight: 600;
    font-size: 16px;
}

.card-subtitle {
    color: var(--tg-theme-hint-color);
    font-size: 13px;
}

.card-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--tg-theme-button-color);
}

.btn-delete {
    background: #ff3b30;
    color: #fff;
    padding: 6px 12px;
    font-size: 12px;
}

#modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 100;
}

#modal-overlay.hidden {
    display: none;
}

#modal {
    background: var(--tg-theme-bg-color);
    border-radius: 16px 16px 0 0;
    padding: 20px;
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

#modal h3 {
    margin-bottom: 16px;
}

#modal label {
    display: block;
    margin-bottom: 4px;
    font-size: 14px;
    color: var(--tg-theme-hint-color);
}

#modal input, #modal select {
    width: 100%;
    margin-bottom: 12px;
}

#modal .btn-row {
    display: flex;
    gap: 8px;
}

#modal .btn-row button {
    flex: 1;
}

.btn-cancel {
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
}

.empty {
    text-align: center;
    padding: 32px 16px;
    color: var(--tg-theme-hint-color);
}
.hidden {
    display: none;
}

.btn-group {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.btn-group .btn-primary,
.btn-group .btn-photo {
    flex: 1;
}

.btn-photo {
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    border: 2px dashed var(--tg-theme-button-color);
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    gap: 12px;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--tg-theme-secondary-bg-color);
    border-top: 3px solid var(--tg-theme-button-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.photo-source-btns {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.photo-source-btns .btn-source {
    flex: 1;
    padding: 12px;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    border: 2px dashed var(--tg-theme-button-color);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
}

.photo-preview {
    width: 100%;
    max-height: 200px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 12px;
}

#modal .btn-row .btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    z-index: 200;
    animation: fadeInUp 0.3s ease, fadeOut 0.3s ease 2.7s;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}