/**
 * COMPONENTS.CSS - Компоненты UI
 */

/* ============================================
   LOADER
   ============================================ */

.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.loader.active {
    opacity: 1;
    visibility: visible;
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loader-logo {
    width: 80px;
    height: 80px;
    animation: pulse 2s ease-in-out infinite;
}

.loader-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-light);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loader-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   HEADER
   ============================================ */

.header {
    height: var(--header-height);
    padding: 0 16px;
    padding-top: var(--safe-area-top);
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-logo {
    width: 32px;
    height: 32px;
}

.header-title {
    display: none;
}

.header-spacer {
    flex: 1;
}

/* ============================================
   TAB BAR
   ============================================ */

.tabbar {
    display: flex;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding-bottom: var(--safe-area-bottom);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    max-width: 480px;
    margin: 0 auto;
}

.tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 4px;
    color: var(--text-tertiary);
    transition: var(--transition-fast);
}

.tab svg {
    width: 22px;
    height: 22px;
}

.tab span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.tab.active {
    color: var(--accent-primary);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: var(--font-size-md);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #000;
}

.btn-primary:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
}

.btn-outline {
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.btn-full {
    width: 100%;
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-md);
    background: var(--bg-input);
}

/* ============================================
   INPUTS
   ============================================ */

.input-row {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition-fast);
}

.input-row:focus-within {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.input-row input {
    flex: 1;
    padding: 14px 16px;
    font-size: var(--font-size-xl);
    font-weight: 600;
    min-width: 0;
}

.currency-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    font-weight: 600;
    border-left: 1px solid var(--border-color);
}

.currency-btn .chevron {
    width: 16px;
    height: 16px;
    opacity: 0.6;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    border: 1px solid var(--border-color);
}

/* ============================================
   MODALS
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-width: 480px;
    max-height: 80vh;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    transform: translateY(100%);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.modal-overlay.active .modal,
.modal.active {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--bg-input);
    font-size: 18px;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.modal-search {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

/* ============================================
   CURRENCY LIST
   ============================================ */

.currency-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.currency-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-input);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.currency-item:active {
    background: var(--bg-tertiary);
}

.currency-icon {
    font-size: 24px;
}

.currency-code {
    font-weight: 600;
}

/* ============================================
   TOASTS
   ============================================ */

.toasts {
    position: fixed;
    top: calc(var(--header-height) + var(--safe-area-top) + 16px);
    left: 16px;
    right: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 2000;
    pointer-events: none;
    max-width: 448px;
    margin: 0 auto;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: auto;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-icon {
    font-size: 18px;
}

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--error); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info { border-left: 3px solid var(--info); }

/* ============================================
   LOADING SPINNER
   ============================================ */

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-light);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 40px auto;
}

/* ============================================
   EMPTY STATE
   ============================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    color: var(--text-secondary);
}

/* ============================================
   TOGGLE
   ============================================ */

.toggle-btn {
    width: 48px;
    height: 28px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    padding: 3px;
    position: relative;
    transition: var(--transition-fast);
}

.toggle-thumb {
    width: 22px;
    height: 22px;
    background: var(--text-secondary);
    border-radius: 50%;
    display: block;
    transition: var(--transition-fast);
}

body[data-theme="dark"] .toggle-btn {
    background: var(--accent-primary);
}

body[data-theme="dark"] .toggle-thumb {
    transform: translateX(20px);
    background: #000;
}

/* ============================================
   COPY BUTTON
   ============================================ */

.copy-btn {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    transition: var(--transition-fast);
}

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