/* Style Design for UniversalTranslate */

/* ==========================================================================
   CSS Variables & Themes
   ========================================================================== */
:root[data-theme="dark"] {
    --bg-primary: #0b0f19;
    --bg-secondary: rgba(17, 24, 39, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #a855f7; /* Purple/Violet */
    --accent-glow: rgba(99, 102, 241, 0.15);
    
    --card-bg: rgba(15, 23, 42, 0.65);
    --input-bg: rgba(3, 7, 18, 0.4);
    
    --blob-1: rgba(99, 102, 241, 0.2);
    --blob-2: rgba(168, 85, 247, 0.15);
    --blob-3: rgba(236, 72, 153, 0.15);
    
    --shadow-main: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --shadow-focus: 0 0 20px 2px rgba(99, 102, 241, 0.25);
    --btn-hover: rgba(255, 255, 255, 0.05);
}

:root[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: rgba(241, 245, 249, 0.7);
    --border-color: rgba(0, 0, 0, 0.06);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-primary: #4f46e5;
    --accent-secondary: #9333ea;
    --accent-glow: rgba(79, 70, 229, 0.1);
    
    --card-bg: rgba(255, 255, 255, 0.75);
    --input-bg: rgba(248, 250, 252, 0.6);
    
    --blob-1: rgba(99, 102, 241, 0.1);
    --blob-2: rgba(168, 85, 247, 0.08);
    --blob-3: rgba(236, 72, 153, 0.08);
    
    --shadow-main: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
    --shadow-focus: 0 0 20px 2px rgba(79, 70, 229, 0.15);
    --btn-hover: rgba(0, 0, 0, 0.03);
}

/* ==========================================================================
   Global Reset & Layouts
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: background-color 0.4s ease, border-color 0.4s ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 1.5rem;
    max-width: 1300px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

/* Decorative Drift Blobs */
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: 1;
    pointer-events: none;
    animation: drift 25s infinite alternate ease-in-out;
}

.blob-1 {
    top: 10%;
    left: 15%;
    width: 350px;
    height: 350px;
    background: var(--blob-1);
    animation-delay: 0s;
}

.blob-2 {
    bottom: 15%;
    right: 15%;
    width: 400px;
    height: 400px;
    background: var(--blob-2);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 50%;
    width: 300px;
    height: 300px;
    background: var(--blob-3);
    animation-delay: -10s;
}

@keyframes drift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(5vw, 10vh) scale(1.15);
    }
    100% {
        transform: translate(-5vw, -5vh) scale(0.9);
    }
}

/* ==========================================================================
   Header Elements
   ========================================================================== */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2.5rem;
    position: relative;
    z-index: 11;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-area h1 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.logo-area h1 span {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.icon-btn:hover {
    color: var(--text-primary);
    background: var(--btn-hover);
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

.icon-btn:active {
    transform: translateY(0);
}

#theme-toggle .sun-icon {
    display: none;
}

#theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] #theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] #theme-toggle .moon-icon {
    display: none;
}

/* ==========================================================================
   Translator Card Container
   ========================================================================== */
.translator-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 1.75rem;
    box-shadow: var(--shadow-main);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    margin-bottom: 2rem;
    position: relative;
    z-index: 10;
}

.controls-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.select-wrapper {
    position: relative;
    flex: 1;
}

.select-wrapper select {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 2.5rem 1rem 1.25rem;
    border-radius: 14px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: all 0.3s ease;
}

.select-wrapper select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-focus);
}

.select-arrow {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
}

.swap-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.swap-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
    transform: rotate(180deg) scale(1.05);
    background: var(--btn-hover);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

.swap-btn:active {
    transform: rotate(180deg) scale(0.95);
}

/* ==========================================================================
   Text Boxes Container (Grid layout)
   ========================================================================== */
.text-boxes-container {
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    gap: 0;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--input-bg);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.panel-divider {
    background-color: var(--border-color);
    width: 100%;
    height: 100%;
}

.text-box-wrapper {
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
    min-height: 240px;
    position: relative;
}

.box-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 28px;
    margin-bottom: 0.5rem;
}

.detected-badge {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(99, 102, 241, 0.25);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2px;
}

.clear-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    margin-left: auto;
    transition: all 0.2s ease;
}

.clear-btn:hover {
    color: var(--text-primary);
    background: var(--btn-hover);
}

.text-box-wrapper textarea {
    flex: 1;
    width: 100%;
    height: 100%;
    background: transparent;
    border: none;
    resize: none;
    color: var(--text-primary);
    font-size: 1.15rem;
    line-height: 1.6;
    outline: none;
    padding: 0.5rem 0;
    min-height: 140px;
}

.text-box-wrapper textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.8;
}

.box-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    min-height: 38px;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn:hover {
    color: var(--text-primary);
    background: var(--btn-hover);
}

.char-counter {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.mini-alert {
    font-size: 0.8rem;
    color: #10b981; /* Green */
    font-weight: 600;
    opacity: 0;
    transform: translateY(5px);
    transition: all 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.mini-alert.show {
    opacity: 1;
    transform: translateY(0);
}

.action-btn.listening {
    color: #ef4444; /* Red */
    background: rgba(239, 68, 68, 0.1);
    animation: pulseMic 1.5s infinite;
}

@keyframes pulseMic {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* Skeleton Loading Overlay */
.skeleton-loader {
    position: absolute;
    top: 3.5rem;
    left: 1.25rem;
    right: 1.25rem;
    display: none;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 5;
    pointer-events: none;
}

.skeleton-line {
    height: 1.2rem;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.03) 25%, 
        rgba(255, 255, 255, 0.08) 50%, 
        rgba(255, 255, 255, 0.03) 75%
    );
    background-size: 200% 100%;
    animation: loadingPulse 1.5s infinite linear;
    border-radius: 4px;
}

[data-theme="light"] .skeleton-line {
    background: linear-gradient(90deg, 
        rgba(0, 0, 0, 0.03) 25%, 
        rgba(0, 0, 0, 0.06) 50%, 
        rgba(0, 0, 0, 0.03) 75%
    );
    background-size: 200% 100%;
}

.skeleton-line.line-1 { width: 85%; }
.skeleton-line.line-2 { width: 95%; }
.skeleton-line.line-3 { width: 60%; }

@keyframes loadingPulse {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.target-wrapper.loading textarea {
    color: transparent !important;
}

.target-wrapper.loading .skeleton-loader {
    display: flex;
}

.translate-action-row {
    display: flex;
    justify-content: flex-end;
}

.translate-btn-main {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #ffffff;
    border: none;
    padding: 0.9rem 2rem;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.translate-btn-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45), 0 0 10px rgba(168, 85, 247, 0.2);
}

.translate-btn-main:active {
    transform: translateY(0);
}

.translate-btn-main svg {
    transition: transform 0.3s ease;
}

.translate-btn-main:hover svg {
    transform: translateX(3px);
}

/* ==========================================================================
   History Drawer Panel
   ========================================================================== */
.history-panel {
    position: fixed;
    top: 0;
    right: -360px;
    width: 360px;
    height: 100vh;
    background: var(--card-bg);
    border-left: 1px solid var(--border-color);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.history-panel.open {
    right: 0;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.history-header h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 1.25rem;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.history-list::-webkit-scrollbar,
.text-box-wrapper textarea::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track,
.text-box-wrapper textarea::-webkit-scrollbar-track {
    background: transparent;
}

.history-list::-webkit-scrollbar-thumb,
.text-box-wrapper textarea::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

.history-list::-webkit-scrollbar-thumb:hover,
.text-box-wrapper textarea::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.history-item {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    position: relative;
    cursor: pointer;
    transition: all 0.2s ease;
}

.history-item:hover {
    border-color: var(--accent-primary);
    background: var(--btn-hover);
    transform: translateY(-1px);
}

.item-langs {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-secondary);
    text-transform: uppercase;
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.item-langs svg {
    color: var(--text-muted);
}

.item-text-src {
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.item-text-tgt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-delete-btn {
    position: absolute;
    right: 0.75rem;
    top: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    display: none;
}

.history-item:hover .item-delete-btn {
    display: block;
}

.item-delete-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
}

.no-history-msg {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    padding: 3rem 1.5rem;
    line-height: 1.5;
}

.history-footer {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
}

.text-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.text-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
}

/* ==========================================================================
   Toast Notification Toasts
   ========================================================================== */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 1000;
    pointer-events: none;
}

.toast {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    min-width: 250px;
    max-width: 350px;
    pointer-events: auto;
    animation: toastIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28) forwards;
}

.toast.toast-error {
    border-left: 4px solid #ef4444;
}

.toast.toast-success {
    border-left: 4px solid #10b981;
}

.toast svg {
    flex-shrink: 0;
}

.toast.toast-error svg { color: #ef4444; }
.toast.toast-success svg { color: #10b981; }

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.toast.fade-out {
    animation: toastOut 0.3s ease-in forwards;
}

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

/* ==========================================================================
   Footer Elements
   ========================================================================== */
footer {
    text-align: center;
    padding: 1.5rem 0;
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 850px) {
    .text-boxes-container {
        grid-template-columns: 1fr;
    }
    
    .panel-divider {
        height: 1px;
        width: 100%;
    }
    
    .text-box-wrapper {
        min-height: 200px;
    }
    
    .text-box-wrapper textarea {
        min-height: 100px;
    }
}

@media (max-width: 600px) {
    body {
        padding: 0;
    }
    
    .app-container {
        padding: 1rem;
    }
    
    header {
        margin-bottom: 1.5rem;
    }
    
    .controls-row {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .select-wrapper {
        width: 100%;
    }
    
    .swap-btn {
        transform: rotate(90deg);
        align-self: center;
    }
    
    .swap-btn:hover {
        transform: rotate(270deg) scale(1.05);
    }
    
    .swap-btn:active {
        transform: rotate(270deg) scale(0.95);
    }
    
    .translate-action-row {
        justify-content: stretch;
    }
    
    .translate-btn-main {
        width: 100%;
        justify-content: center;
    }
    
    .history-panel {
        width: 100%;
        right: -100%;
    }
}