/* ==========================================================================
   Transliterator Module - Modern 2026 Design
   Адаптив: mobile-first, идеально на всех устройствах
   ========================================================================== */

:root {
    --transliterator-bg: var(--white);
    --transliterator-border: var(--gray-200);
    --transliterator-hover: var(--gray-50);
    --transliterator-focus: var(--primary-50);
    --transliterator-panel-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.1);
    --transliterator-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --panel-min-height: clamp(150px, 40vh, 250px);
}

/* ==========================================================================
   Layout - Mobile First
   ========================================================================== */
.transliterator {
    padding: clamp(16px, 5vw, 40px) 0;
    min-height: calc(100vh - 80px - 200px);
}

@media (min-width: 768px) {
    .page-description {
        padding: 0;
    }
}

/* ==========================================================================
   Main Grid - Mobile First
   ========================================================================== */
.transliterator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(12px, 3vw, 20px);
    margin-bottom: clamp(20px, 5vw, 32px);
}

@media (min-width: 768px) {
    .transliterator-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }
}

/* ==========================================================================
   Panels Common - Mobile First
   ========================================================================== */
.input-panel,
.output-panel {
    background: var(--transliterator-bg);
    border: 1px solid var(--transliterator-border);
    border-radius: clamp(16px, 4vw, 24px);
    overflow: hidden;
    box-shadow: var(--transliterator-panel-shadow);
    transition: var(--transliterator-transition);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.98);
    height: fit-content;
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .input-panel,
    .output-panel {
        border-radius: var(--border-radius-xl);
    }
}

.input-panel:hover,
.output-panel:hover {
    border-color: var(--primary-300);
    box-shadow: 0 25px 50px -15px rgba(79, 70, 229, 0.2);
}

@media (hover: none) and (pointer: coarse) {
    .input-panel:hover,
    .output-panel:hover {
        border-color: var(--transliterator-border);
        box-shadow: var(--transliterator-panel-shadow);
    }
}

/* ==========================================================================
   Panel Headers - Mobile First
   ========================================================================== */
.panel-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: clamp(12px, 3vw, 16px) clamp(16px, 4vw, 24px);
    border-bottom: 1px solid var(--transliterator-border);
    background: linear-gradient(to right, var(--gray-50), transparent);
    gap: 8px;
}

@media (min-width: 480px) {
    .panel-header {
        flex-wrap: nowrap;
    }
}

.panel-title {
    display: flex;
    align-items: center;
    gap: clamp(4px, 2vw, 8px);
    font-weight: 600;
    color: var(--gray-700);
    font-size: clamp(0.875rem, 3vw, 1rem);
}

.panel-title ion-icon {
    font-size: clamp(1rem, 4vw, 1.25rem);
    color: var(--primary-500);
    flex-shrink: 0;
}

.panel-actions {
    display: flex;
    gap: 4px;
    margin-left: auto;
}

@media (max-width: 480px) {
    .panel-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* ==========================================================================
   Icon Buttons - Mobile First
   ========================================================================== */
.icon-button {
    background: transparent;
    border: none;
    padding: clamp(6px, 2vw, 8px);
    border-radius: var(--border-radius-full);
    color: var(--gray-500);
    cursor: pointer;
    transition: var(--transliterator-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(32px, 8vw, 40px);
    height: clamp(32px, 8vw, 40px);
    min-width: 32px;
    min-height: 32px;
}

@media (min-width: 768px) {
    .icon-button {
        width: 36px;
        height: 36px;
    }
}

.icon-button:hover {
    background: var(--gray-100);
    color: var(--primary-600);
    transform: scale(1.05);
}

.icon-button:active {
    transform: scale(0.95);
}

.icon-button ion-icon {
    font-size: clamp(1rem, 4vw, 1.25rem);
    pointer-events: none;
}

/* Touch optimization */
@media (hover: none) and (pointer: coarse) {
    .icon-button {
        -webkit-tap-highlight-color: transparent;
    }
    
    .icon-button:active {
        background: var(--gray-100);
        transform: none;
    }
}

/* ==========================================================================
   Input/Output Areas - Mobile First
   ========================================================================== */
.input-wrapper,
.output-wrapper {
    padding: clamp(16px, 4vw, 24px);
    min-height: var(--panel-min-height);
    flex: 1;
}

.transliterator-textarea {
    width: 100%;
    min-height: clamp(120px, 30vh, 200px);
    border: none;
    outline: none;
    font-family: var(--font-primary);
    font-size: clamp(0.875rem, 3vw, 1rem);
    line-height: 1.7;
    color: var(--gray-900);
    background: transparent;
    resize: vertical;
    padding: 0;
}

@media (min-width: 768px) {
    .transliterator-textarea {
        min-height: 200px;
    }
}

.transliterator-textarea::placeholder {
    color: var(--gray-400);
    font-style: italic;
}

/* ==========================================================================
   Output Content - Mobile First
   ========================================================================== */
.output-content {
    font-family: var(--font-primary);
    font-size: clamp(0.875rem, 3vw, 1rem);
    line-height: 1.7;
    color: var(--gray-900);
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: clamp(120px, 30vh, 200px);
}

.output-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(8px, 2vw, 12px);
    color: var(--gray-400);
    pointer-events: none;
    transition: var(--transliterator-transition);
    width: 100%;
    padding: 16px;
    text-align: center;
}

.output-placeholder ion-icon {
    font-size: clamp(2rem, 8vw, 2.5rem);
    opacity: 0.5;
}

.output-placeholder span {
    font-size: clamp(0.75rem, 3vw, 0.9375rem);
    font-style: italic;
}

.output-wrapper {
    position: relative;
}

.output-wrapper:not(:empty) + .output-placeholder {
    opacity: 0;
    visibility: hidden;
}

/* ==========================================================================
   Footers - Mobile First
   ========================================================================== */
.input-footer,
.output-footer {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: clamp(8px, 2vw, 12px) clamp(16px, 4vw, 24px);
    background: var(--gray-50);
    border-top: 1px solid var(--transliterator-border);
    font-size: clamp(0.75rem, 3vw, 0.875rem);
    color: var(--gray-600);
}

@media (min-width: 480px) {
    .input-footer,
    .output-footer {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.direction-badge {
    background: var(--white);
    padding: 4px clamp(8px, 3vw, 12px);
    border-radius: var(--border-radius-full);
    border: 1px solid var(--gray-200);
    font-weight: 500;
    font-size: clamp(0.75rem, 2.5vw, 0.875rem);
    white-space: nowrap;
}

.stats {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

#char-count {
    font-weight: 600;
    color: var(--primary-600);
}

/* ==========================================================================
   Settings Panel - Mobile First
   ========================================================================== */
.settings-panel {
    background: var(--white);
    border: 1px solid var(--transliterator-border);
    border-radius: clamp(16px, 4vw, 24px);
    padding: clamp(16px, 4vw, 24px);
    margin-bottom: clamp(16px, 4vw, 24px);
    box-shadow: var(--transliterator-panel-shadow);
    transition: var(--transliterator-transition);
}

@media (min-width: 768px) {
    .settings-panel {
        border-radius: var(--border-radius-xl);
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }
}

.settings-panel:hover {
    border-color: var(--primary-300);
}

.settings-header {
    display: flex;
    align-items: center;
    gap: clamp(4px, 2vw, 8px);
    margin-bottom: clamp(16px, 4vw, 24px);
    font-weight: 600;
    color: var(--gray-700);
    font-size: clamp(0.9375rem, 3vw, 1rem);
}

.settings-header ion-icon {
    font-size: clamp(1rem, 4vw, 1.25rem);
    color: var(--primary-500);
    flex-shrink: 0;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(4px, 2vw, 8px);
}

@media (min-width: 640px) {
    .settings-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .settings-grid {
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
        gap: 5px;
    }
}

.setting-item {
    display: flex;
    align-items: center;
    gap: clamp(8px, 2vw, 12px);
    cursor: pointer;
    padding: clamp(8px, 2vw, 12px) clamp(8px, 2vw, 16px);
    border-radius: clamp(8px, 2vw, 12px);
    transition: var(--transliterator-transition);
    min-height: 44px;
}

@media (min-width: 768px) {
    .setting-item {
        min-height: auto;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

.setting-item:hover {
    background: var(--gray-50);
}

.setting-item input[type="checkbox"] {
    display: none;
}

.setting-checkbox {
    width: clamp(18px, 5vw, 22px);
    height: clamp(18px, 5vw, 22px);
    min-width: 18px;
    min-height: 18px;
    border: 2px solid var(--gray-300);
    border-radius: 6px;
    display: inline-block;
    position: relative;
    transition: var(--transliterator-transition);
}

.setting-item input[type="checkbox"]:checked + .setting-checkbox {
    background: var(--primary-600);
    border-color: var(--primary-600);
}

.setting-item input[type="checkbox"]:checked + .setting-checkbox::after {
    content: '';
    position: absolute;
    left: calc(50% - 5px);
    top: calc(50% - 2px);
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-50%, -50%);
}

.setting-label {
    color: var(--gray-700);
    font-size: clamp(0.875rem, 3vw, 0.9375rem);
    line-height: 1.4;
    flex: 1;
}

/* Touch optimization for settings */
@media (hover: none) and (pointer: coarse) {
    .setting-item {
        background: var(--white);
        border: 1px solid var(--gray-200);
        margin-bottom: 4px;
    }
    
    .setting-item:active {
        background: var(--gray-50);
    }
}

/* ==========================================================================
   Hints Panel - Mobile First
   ========================================================================== */
.hints-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(8px, 2vw, 12px);
    margin-top: clamp(20px, 5vw, 32px);
}

@media (min-width: 640px) {
    .hints-panel {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .hints-panel {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-md);
        margin-top: var(--spacing-xl);
    }
}

.hint-item {
    display: flex;
    align-items: center;
    gap: clamp(8px, 2vw, 12px);
    padding: clamp(10px, 3vw, 14px) clamp(12px, 4vw, 20px);
    background: var(--gray-50);
    border-radius: var(--border-radius-full);
    color: var(--gray-600);
    font-size: clamp(0.75rem, 3vw, 0.875rem);
    border: 1px solid var(--gray-200);
    transition: var(--transliterator-transition);
    min-height: 44px;
}

@media (min-width: 768px) {
    .hint-item {
        min-height: auto;
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

.hint-item:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
    color: var(--primary-700);
}

.hint-item ion-icon {
    color: var(--primary-500);
    font-size: clamp(0.875rem, 3vw, 1rem);
    flex-shrink: 0;
}

/* ==========================================================================
   Notifications - Mobile First
   ========================================================================== */
.notification-container {
    position: fixed;
    bottom: clamp(10px, 3vw, 20px);
    right: clamp(10px, 3vw, 20px);
    left: clamp(10px, 3vw, 20px);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

@media (min-width: 640px) {
    .notification-container {
        left: auto;
        width: auto;
        max-width: 320px;
    }
}

.notification {
    background: var(--gray-900);
    color: var(--white);
    padding: clamp(10px, 3vw, 14px) clamp(16px, 4vw, 24px);
    border-radius: var(--border-radius-full);
    font-size: clamp(0.75rem, 3vw, 0.875rem);
    display: flex;
    align-items: center;
    gap: clamp(8px, 2vw, 12px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    animation: slideIn 0.3s ease-out;
    max-width: 100%;
    backdrop-filter: blur(10px);
    background: rgba(15, 23, 42, 0.95);
    pointer-events: auto;
}

@media (min-width: 640px) {
    .notification {
        max-width: 300px;
    }
}

.notification.success {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.notification.error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.notification ion-icon {
    font-size: clamp(1rem, 4vw, 1.25rem);
    flex-shrink: 0;
}

.notification.fade-out {
    animation: fadeOut 0.3s ease-out forwards;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ==========================================================================
   Loading State
   ========================================================================== */
.transliterator.loading .output-content {
    position: relative;
    color: transparent;
}

.transliterator.loading .output-content::after {
    content: '';
    position: absolute;
    width: clamp(16px, 5vw, 20px);
    height: clamp(16px, 5vw, 20px);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid var(--gray-200);
    border-top-color: var(--primary-600);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* ==========================================================================
   Focus States
   ========================================================================== */
.transliterator-textarea:focus {
    outline: none;
}

.setting-item input[type="checkbox"]:focus + .setting-checkbox {
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

/* ==========================================================================
   Touch Device Optimizations
   ========================================================================== */
@media (hover: none) and (pointer: coarse) {
    .icon-button,
    .setting-item,
    .hint-item {
        cursor: default;
        -webkit-tap-highlight-color: transparent;
    }
    
    .icon-button:active {
        background: var(--gray-100);
        transform: none;
    }
    
    .hint-item:active {
        background: var(--primary-50);
        border-color: var(--primary-300);
    }
    
    .transliterator-textarea {
        font-size: 16px; /* Предотвращает зум на iOS */
    }
}

/* ==========================================================================
   Landscape Mode Optimization
   ========================================================================== */
@media (max-height: 600px) and (orientation: landscape) {
    .input-wrapper,
    .output-wrapper {
        min-height: 120px;
    }
    
    .transliterator-textarea {
        min-height: 100px;
    }
    
    .output-content {
        min-height: 100px;
    }
    
    .settings-panel {
        max-height: 200px;
        overflow-y: auto;
    }
}

/* ==========================================================================
   Small Height Devices
   ========================================================================== */
@media (max-height: 700px) {
    .page-header {
        margin-bottom: 16px;
    }
    
    .transliterator-grid {
        gap: 12px;
    }
    
    .input-wrapper,
    .output-wrapper {
        min-height: 120px;
    }
}

/* ==========================================================================
   High-DPI Screens
   ========================================================================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .input-panel,
    .output-panel,
    .settings-panel {
        border-width: 0.5px;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .transliterator {
        padding: 0;
    }

    .settings-panel,
    .hints-panel,
    .panel-actions,
    .icon-button,
    .notification-container {
        display: none;
    }

    .input-panel,
    .output-panel {
        box-shadow: none;
        border: 1px solid #000;
        break-inside: avoid;
    }
    
    .page-title {
        -webkit-text-fill-color: initial;
        background: none;
        color: #000;
    }
}