/* ==========================================================================
   KUCLAB TRANSLATOR // CYBER-BRUTALIST FRAMED STYLESHEET
   ========================================================================== */

/* DESIGN SYSTEM VARIABLES */
:root {
    --bg-black: #08080a; /* Neutral deep gray-black */
    --bg-dark-gray: #0f0f12; /* Neutral dark gray */
    --bg-panel: #141419; /* Neutral deep gray panels */
    
    --border-color: #ffffff;
    --border-dim: #2f2f3c;
    
    --neon-green: #00ff66;
    --neon-cyan: #00e5ff;
    --neon-yellow: #ffff00;
    --neon-pink: #ff007f;
    --neon-orange: #ff7700;
    --text-white: #ffffff;
    --text-muted: #b8b8d0;
    
    --border-width: 3px;
    --border-width-sm: 2px;
    
    --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --shadow-offset: 5px;
}

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

body {
    background-color: var(--bg-black);
    color: var(--text-white);
    font-family: var(--font-sans);
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px; /* About 1cm margin all around */
    overflow: hidden; /* Hide screen scrollbars on desktop */
    position: relative;
    
    /* Cyber grid lines in subtle neutral gray */
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
    background-size: 30px 30px;
}


/* APP FRAMED CONTAINER */
.app-wrapper {
    width: 100%;
    height: calc(100vh - 40px); /* Stretch to fill available vertical space */
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* HEADER CARD (Glassmorphic) */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: var(--border-width) solid var(--border-color);
    background-color: rgba(20, 20, 25, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 16px 24px;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--neon-cyan);
    flex-shrink: 0;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Brand SVG Logo */
.logo-svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    transform-origin: 50% 50%;
    display: block;
    cursor: pointer;
    will-change: transform;
    backface-visibility: hidden;
    transform: translate3d(0, 0, 0);
    contain: layout paint;
}

@keyframes rotate-logo {
    0% { transform: translate3d(0, 0, 0) rotate(0deg); }
    100% { transform: translate3d(0, 0, 0) rotate(360deg); }
}

/* Spin logo smoothly (duration 0.3s) with GPU acceleration and layout containment */
.logo-svg.rotating {
    animation: rotate-logo 0.3s linear infinite;
}

/* Rotate logo exactly 25 times (9000deg) on click */
@keyframes spin-25-times {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(9000deg); }
}

.logo-svg.spinning-click {
    animation: spin-25-times 3.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.brand-title {
    font-size: 1.7rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    font-family: var(--font-sans);
}

/* FRAMED PANELS GRID */
.translator-grid {
    flex-grow: 1; /* Stretch grid to fill app height */
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
    gap: 20px;
    position: relative;
    height: 0; /* Important flex layout helper to let children scroll */
}

/* PANEL WINDOW CARDS (Glassmorphic) */
.panel {
    display: flex;
    flex-direction: column;
    background-color: rgba(20, 20, 25, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border-width) solid var(--border-color);
    position: relative;
    height: 100%;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.source-panel {
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--neon-green);
}

/* Focused panel states (Orange borders, no offsets, no blur shadow glows!) */
.source-panel:focus-within {
    border-color: var(--neon-orange);
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--neon-green);
    transform: none; /* Disables panel jumping/offset translation */
}

.target-panel {
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--neon-pink);
}

.target-panel:focus-within {
    border-color: var(--border-color); /* Kept white, since target is readonly */
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--neon-pink);
    transform: none; /* Disables panel jumping/offset translation */
}

/* PANEL HEADER */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: var(--border-width) solid var(--border-color);
    padding: 12px 20px;
    background-color: rgba(255, 255, 255, 0.01);
    flex-shrink: 0;
    position: relative;
    z-index: 20;
}

/* CUSTOM SEARCHABLE SELECT DROPDOWN */
.custom-select-container {
    position: relative;
    width: 250px;
}

.custom-select-trigger {
    width: 100%;
    background-color: var(--bg-black);
    color: var(--text-white);
    border: var(--border-width-sm) solid var(--border-color);
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.95rem;
    cursor: pointer;
    outline: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 0;
    transition: border-color 0.15s;
}

.custom-select-trigger:hover, .custom-select-trigger:focus {
    border-color: var(--neon-cyan);
}

.custom-select-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    width: 320px;
    background-color: var(--bg-panel);
    border: var(--border-width) solid var(--border-color);
    z-index: 999;
    display: none; 
    flex-direction: column;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px #000000;
}

.custom-select-dropdown.active {
    display: flex;
}

.dropdown-search-wrapper {
    display: flex;
    align-items: center;
    border-bottom: var(--border-width-sm) solid var(--border-color);
    padding: 8px 12px;
    background-color: var(--bg-black);
    gap: 10px;
}

.search-icon {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.dropdown-search-input {
    background: transparent;
    border: none;
    color: var(--text-white);
    outline: none;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    width: 100%;
}

.dropdown-options {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 280px;
    overflow-y: auto;
}

.dropdown-options li {
    padding: 10px 16px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.1s, color 0.1s;
}

.dropdown-options li:hover {
    background-color: var(--neon-cyan);
    color: #000000;
}

.dropdown-options li.selected {
    background-color: var(--neon-green);
    color: #000000;
}

/* TEXTAREA AREA */
.textarea-container {
    position: relative;
    flex-grow: 1;
    display: flex;
    overflow: hidden;
    min-height: 0; /* Crucial for child scrolling inside flex containers */
}

.textarea-container.drag-over {
    outline: 3px dashed var(--neon-cyan);
    outline-offset: -3px;
}

textarea {
    width: 100%;
    height: 100%;
    resize: none;
    background-color: var(--bg-black);
    color: var(--text-white);
    border: none;
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    line-height: 1.6;
    outline: none;
    overflow-y: auto;
}

textarea::placeholder {
    color: var(--text-muted);
}

textarea::selection {
    background-color: var(--neon-cyan);
    color: #000000;
}

textarea[readonly] {
    background-color: var(--bg-black);
}

/* PANEL FOOTER */
.panel-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: var(--border-width) solid var(--border-color);
    padding: 14px 20px;
    background-color: rgba(255, 255, 255, 0.01);
    flex-shrink: 0;
}

.footer-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.char-count {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 700;
}

.infinity-symbol {
    font-size: 1.2rem;
    vertical-align: middle;
    color: var(--neon-cyan);
}

/* SWAP BUTTON (Floats on border gap) */
.swap-container {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 100;
    pointer-events: none;
}

.swap-btn {
    pointer-events: auto;
    width: 58px;
    height: 58px;
    border: var(--border-width) solid var(--border-color);
    background-color: var(--neon-cyan);
    color: #000000;
    cursor: pointer;
    outline: none;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 4px 4px 0px #ffffff;
    transition: transform 0.1s, box-shadow 0.1s, background-color 0.2s;
    border-radius: 0;
}

.swap-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px #ffffff;
    background-color: var(--neon-yellow);
}

.swap-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px #ffffff;
}

.icon-swap {
    width: 26px;
    height: 26px;
}

/* BRUTALIST BUTTONS */
.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--text-white);
    color: #000000;
    border: var(--border-width-sm) solid var(--border-color);
    padding: 8px 16px;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.85rem;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s, background-color 0.2s;
    box-shadow: 3px 3px 0px var(--neon-cyan);
    border-radius: 0;
}

.action-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0px var(--neon-cyan);
    background-color: var(--neon-green);
}

.action-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--neon-cyan);
}

.action-btn.secondary-btn {
    background-color: var(--bg-black);
    color: var(--text-white);
    border-color: var(--border-dim);
    box-shadow: 3px 3px 0px #333333;
}

.action-btn.secondary-btn:hover {
    background-color: #1a1a2b;
    border-color: var(--border-color);
    box-shadow: 4px 4px 0px var(--text-white);
}

.action-btn.secondary-btn:active {
    box-shadow: 1px 1px 0px var(--text-white);
}

.icon {
    width: 16px;
    height: 16px;
}

/* SPEECH MIC WAVE ANIMATION */
.dictation-wave {
    position: absolute;
    bottom: 24px;
    right: 24px;
    display: none;
    align-items: flex-end;
    gap: 3px;
    height: 30px;
    background: rgba(0, 0, 0, 0.8);
    padding: 8px 12px;
    border: var(--border-width-sm) solid var(--neon-green);
    box-shadow: 3px 3px 0px var(--neon-green);
    z-index: 5;
}

.dictation-wave.active {
    display: flex;
}

.dictation-wave .bar {
    width: 3px;
    height: 4px;
    background-color: var(--neon-green);
    animation: dance 0.8s ease-in-out infinite alternate;
}

.dictation-wave .bar:nth-child(2) { animation-delay: 0.15s; }
.dictation-wave .bar:nth-child(3) { animation-delay: 0.3s; }
.dictation-wave .bar:nth-child(4) { animation-delay: 0.05s; }
.dictation-wave .bar:nth-child(5) { animation-delay: 0.25s; }

@keyframes dance {
    0% { height: 4px; }
    100% { height: 24px; }
}

/* LOADING / TRANSLATING / READING FILE OVERLAYS */
.loader-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(5, 5, 11, 0.85);
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 16px;
    z-index: 10;
}

.loader-overlay.active {
    display: flex;
}

.cyber-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid var(--neon-pink);
    border-top-color: transparent;
    animation: spin-blocky 0.3s linear infinite;
}

@keyframes spin-blocky {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-status {
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.9rem;
    letter-spacing: 2px;
    color: var(--neon-pink);
}

/* TOAST ALERT */
.toast-notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--bg-panel);
    color: var(--neon-green);
    border: var(--border-width) solid var(--neon-green);
    padding: 14px 28px;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    box-shadow: 4px 4px 0px #000000;
    z-index: 10000;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s;
    opacity: 0;
    pointer-events: none;
    border-radius: 0;
}

.toast-notification.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* CUSTOM SCROLLBARS */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-black);
}

::-webkit-scrollbar-thumb {
    background: var(--text-white);
    border: var(--border-width-sm) solid var(--bg-black);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neon-cyan);
}

.dropdown-options::-webkit-scrollbar-track {
    background: var(--bg-panel);
}

.dropdown-options::-webkit-scrollbar-thumb {
    background: #252636;
}

.dropdown-options::-webkit-scrollbar-thumb:hover {
    background: var(--neon-cyan);
}

/* RESPONSIVE SCROLLS & STACKING */
@media (max-width: 900px) and (min-width: 601px) {
    body {
        overflow-y: auto;
        padding: 16px;
        height: auto;
    }
    
    .app-wrapper {
        height: auto;
        gap: 16px;
    }
    
    .translator-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        height: auto;
    }
    
    .panel {
        min-height: 400px;
    }
    
    .swap-container {
        grid-row: 2;
        position: relative;
        left: 0;
        top: 0;
        transform: none;
        display: flex;
        justify-content: center;
        margin: -12px 0;
    }
    
    .swap-btn {
        transform: rotate(90deg);
    }
    
    .swap-btn:hover {
        transform: rotate(90deg) translate(-2px, -2px);
    }
    
    .swap-btn:active {
        transform: rotate(90deg) translate(2px, 2px);
    }
    
    .custom-select-dropdown {
        width: 100%;
        max-width: calc(100vw - 32px);
    }
}

@media (max-width: 600px) {
    body {
        padding: 12px;
        height: auto;
        min-height: 100vh;
        overflow-y: auto;
    }
    
    .app-wrapper {
        height: auto;
        gap: 16px;
    }
    
    /* Mobile Header - Compact but keeps PC styling details */
    .app-header {
        padding: 12px 16px;
    }
    
    .brand-title {
        font-size: 1.25rem;
        letter-spacing: 0.5px;
    }
    
    .logo-svg {
        width: 24px;
        height: 24px;
    }
    
    .translator-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 20px;
        height: auto;
    }
    
    /* Mobile Panels - Keeps PC card borders, backgrounds and shadows */
    .panel {
        height: auto;
        overflow: visible; /* Prevent dropdown clipping */
    }
    
    .panel .textarea-container {
        height: 180px;
    }
    
    /* Compact headers/footers with PC borders */
    .panel-header {
        padding: 10px 16px;
    }
    
    .panel-footer {
        padding: 10px 16px;
    }
    
    .custom-select-container {
        width: 100%;
    }
    
    .custom-select-trigger {
        padding: 6px 10px;
        font-size: 0.85rem;
    }
    
    .custom-select-dropdown {
        width: 100%;
        max-height: 240px;
        box-shadow: var(--shadow-offset) var(--shadow-offset) 0px #000000;
    }
    
    /* Compact Brutalist Action Buttons with full labels */
    .action-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
        gap: 6px;
        box-shadow: 2px 2px 0px var(--neon-cyan);
    }
    
    .action-btn:hover {
        transform: translate(-1px, -1px);
        box-shadow: 3px 3px 0px var(--neon-cyan);
    }
    
    .action-btn:active {
        transform: translate(1px, 1px);
        box-shadow: 1px 1px 0px var(--neon-cyan);
    }
    
    .action-btn.secondary-btn {
        box-shadow: 2px 2px 0px #333333;
    }
    
    .action-btn.secondary-btn:hover {
        box-shadow: 3px 3px 0px var(--text-white);
    }
    
    .action-btn.secondary-btn:active {
        box-shadow: 1px 1px 0px var(--text-white);
    }
    
    .char-count {
        font-size: 0.75rem;
    }
    
    /* Swap button positioned vertically between cards */
    .swap-container {
        position: relative;
        left: 0;
        top: 0;
        transform: none;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 40px;
        margin: -10px 0;
        z-index: 100;
        pointer-events: none;
    }
    
    .swap-btn {
        pointer-events: auto;
        width: 46px;
        height: 46px;
        border: var(--border-width-sm) solid var(--border-color);
        box-shadow: 3px 3px 0px #ffffff;
        background-color: var(--neon-cyan);
        color: #000000;
        transform: rotate(90deg);
        border-radius: 0;
    }
    
    .swap-btn:hover {
        transform: rotate(90deg) translate(-1px, -1px);
        box-shadow: 4px 4px 0px #ffffff;
        background-color: var(--neon-yellow);
    }
    
    .swap-btn:active {
        transform: rotate(90deg) translate(1px, 1px);
        box-shadow: 2px 2px 0px #ffffff;
    }
    
    .icon-swap {
        width: 20px;
        height: 20px;
    }
}