/* === Root Theme Variables === */
:root {
    --bg-dark: #0d1117;
    --bg-light: #f6f8fa;
    --card-dark: #161b22;
    --card-light: #ffffff;
    --border-dark: #30363d;
    --border-light: #d0d7de;
    --text-dark: #e6edf3;
    --text-light: #24292f;
    --text-muted-dark: #7d8590;
    --text-muted-light: #57606a;
    --primary: #58a6ff; /* Blue */
    --green: #2ea043; /* Success */
    --red: #d73a49; /* Error/Danger */
    --blue: #0969da; /* General Blue */
    --orange: #f57c00;
    --purple: #8250df;
    --shadow-dark: rgba(200, 200, 255, 0.1);
    --shadow-light: rgba(27, 31, 35, 0.1);
    --button-shadow-dark: rgba(0, 0, 0, 0.4);
    --button-shadow-light: rgba(0, 0, 0, 0.15);
}

/* === Base Styles === */
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    font-size: 16px;
}
body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.05) 1px, transparent 0);
    background-size: 20px 20px;
}
body.light-mode { background-color: var(--bg-light); color: var(--text-light); }
.container {
    max-width: 1200px;
    margin: 80px auto 20px auto; /* Adjusted top margin for new header height */
    padding: 0 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    box-sizing: border-box;
}

/* === Top Bar & Controls === */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: nowrap;
    gap: 20px;
    margin: 0;
    padding: 10px 20px; /* Reduced padding */
    width: 100%;
    box-sizing: border-box;
    border-bottom: 1px solid var(--border-dark);
    min-height: 50px; /* Reduced min-height */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-dark);
}
body.light-mode .top-bar {
    border-bottom-color: var(--border-light);
    background: var(--bg-light);
}
.logo-title {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    flex: 0 0 auto;
}
.logo-title h1 {
    font-size: 1.6rem;
    margin: 0;
    white-space: nowrap;
}
.header-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
    flex: 0 0 auto;
}

/* === General Button Styles === */
.btn-main {
    padding: 10px 18px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    white-space: nowrap;
    border: 1px solid transparent;
    box-shadow: 0 4px 8px var(--button-shadow-dark);
    color: white;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    box-sizing: border-box;
}
body.light-mode .btn-main {
    box-shadow: 0 4px 8px var(--button-shadow-light);
}
.btn-main:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}
.btn-green { background-color: var(--green); }
.btn-blue { background-color: var(--blue); }
.btn-main:disabled {
    background-color: var(--card-dark) !important;
    color: var(--text-muted-dark) !important;
    cursor: not-allowed;
    border: 1px solid var(--border-dark) !important;
    transform: none !important;
    filter: brightness(0.7) !important;
    box-shadow: none !important;
}
body.light-mode .btn-main:disabled {
    background-color: #f6f8fa !important;
    color: var(--text-muted-light) !important;
    border-color: var(--border-light) !important;
}

/* === Theme Toggle Switch === */
.toggle-switch { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }
.switch { position: relative; display: inline-block; width: 45px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--bg-dark); border: 1px solid var(--border-dark); transition: .4s; border-radius: 24px; }
.slider:before { position: absolute; content: ""; height: 16px; width: 16px; left: 3px; bottom: 3px; background-color: var(--text-muted-dark); transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: var(--primary); border-color: var(--primary); }
input:checked + .slider:before { transform: translateX(20px); background-color: white; }
body.light-mode .slider { background-color: var(--bg-light); border-color: var(--border-light); }
body.light-mode .slider:before { background-color: var(--text-muted-light); }

/* === Main Content Area === */
.main-content-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
    flex-grow: 1;
    align-items: center;
    justify-content: center; /* Added to vertically center the card */
    padding: 20px 0;
    width: 100%;
    box-sizing: border-box;
}

.card {
    background: var(--card-dark);
    border: 1px solid var(--border-dark);
    padding: 30px;
    border-radius: 12px;
    width: 100%;
    max-width: 1100px; /* Increased width */
    box-sizing: border-box;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 5px 15px var(--shadow-dark);
    text-align: center;
}
body.light-mode .card { background: var(--card-light); border: 1px solid var(--border-light); box-shadow: 0 5px 15px var(--shadow-light); }

.card h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.8rem;
    color: var(--primary);
}
.card p {
    margin-top: 0;
    margin-bottom: 30px;
    color: var(--text-muted-dark);
}
body.light-mode .card p {
    color: var(--text-muted-light);
}

/* === Compressor Section === */
.controls-area {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.input-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 1;
    min-width: 0;
}

.file-name-container {
    max-width: 250px;
    overflow: hidden;
    white-space: nowrap;
    height: 40px;
    display: inline-flex;
    align-items: center;
}

.file-name {
    color: var(--text-muted-dark);
    font-style: italic;
    display: inline-block;
    white-space: nowrap;
    will-change: transform;
}

body.light-mode .file-name {
    color: var(--text-muted-light);
}

.file-name.scrolling {
    padding-left: 100%;
    animation: marquee 15s linear infinite;
}

@keyframes marquee {
  0% {
    transform: translateX(0%);
  }
  100% {
    transform: translateX(-200%);
  }
}


/* Compound Input Group for Target Size */
.input-group-compound {
    display: flex;
    align-items: center;
    height: 40px;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    box-sizing: border-box;
    overflow: hidden;
    transition: border-color 0.2s;
}

body.light-mode .input-group-compound {
    background-color: var(--bg-light);
    border-color: var(--border-light);
}

.input-group-compound:focus-within {
    border-color: var(--primary);
}

.input-group-compound .label {
    padding: 0 15px;
    font-weight: 600;
    color: var(--text-muted-dark);
    background-color: var(--card-dark);
    height: 100%;
    display: flex;
    align-items: center;
    border-right: 1px solid var(--border-dark);
}

body.light-mode .input-group-compound .label {
    background-color: #f0f2f5;
    color: var(--text-muted-light);
    border-right-color: var(--border-light);
}

.input-group-compound input[type="number"] {
    height: 100%;
    border: none;
    background: transparent;
    color: var(--text-dark);
    font-size: 1rem;
    text-align: center;
    outline: none;
    padding: 0 10px;
    width: 120px;
    -moz-appearance: textfield;
}

.input-group-compound input[type=number]::-webkit-inner-spin-button,
.input-group-compound input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

body.light-mode .input-group-compound input[type="number"] {
    color: var(--text-light);
}

.select-wrapper {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    border-left: 1px solid var(--border-dark);
}
body.light-mode .select-wrapper {
    border-left-color: var(--border-light);
}

.select-wrapper::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 12px;
    width: 0;
    height: 0;
    border: 5px solid transparent;
    border-top-color: var(--text-muted-dark);
    transform: translateY(-25%);
    pointer-events: none;
    transition: border-color 0.2s;
}
body.light-mode .select-wrapper::after {
    border-top-color: var(--text-muted-light);
}


.input-group-compound select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    height: 100%;
    border: none;
    background-color: var(--card-dark);
    color: var(--text-dark);
    padding: 0 30px 0 15px;
    font-size: 1rem;
    outline: none;
    cursor: pointer;
    font-weight: 600;
}

body.light-mode .input-group-compound select {
    background-color: #f0f2f5;
    color: var(--text-light);
}


.preview-area {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    margin-top: 20px;
    flex-wrap: wrap;
}
.image-container {
    border: 2px dashed var(--border-dark);
    border-radius: 8px;
    padding: 20px;
    width: 100%;
    max-width: 400px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
body.light-mode .image-container {
    border-color: var(--border-light);
}
.image-container h3 {
    margin-top: 0;
    color: var(--primary);
}
.image-container img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 6px;
    margin-bottom: 15px;
}
.image-container p {
    font-weight: bold;
    margin-bottom: 15px;
}

/* === Download Area (New) === */
.download-area {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-top: 15px;
}
.download-area input[type="text"] {
    height: 40px;
    border: 1px solid var(--border-dark);
    background: var(--bg-dark);
    color: var(--text-dark);
    font-size: 1rem;
    outline: none;
    padding: 0 15px;
    border-radius: 6px;
    flex-grow: 1;
    min-width: 0;
    max-width: 250px;
}
body.light-mode .download-area input[type="text"] {
    background: var(--bg-light);
    border-color: var(--border-light);
    color: var(--text-light);
}
.download-area .btn-main {
    flex-shrink: 0;
}


/* Loading Spinner */
.loading-spinner {
    border: 5px solid var(--border-dark);
    border-top: 5px solid var(--primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Message Box */
.message-box {
    padding: 15px;
    border-radius: 6px;
    font-weight: 600;
    margin-bottom: 20px;
}
.message-box.error {
    background-color: rgba(215, 58, 73, 0.2);
    color: var(--red);
    border: 1px solid var(--red);
}
.message-box.success {
    background-color: rgba(46, 160, 67, 0.2);
    color: var(--green);
    border: 1px solid var(--green);
}


/* === Responsive Adjustments === */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
        margin-top: 70px;
    }
    .top-bar {
        padding: 8px 15px;
        min-height: 60px;
    }
    .logo-title h1 {
        font-size: 1.4rem;
    }
    .header-controls {
        gap: 10px;
    }
    .toggle-switch {
        font-size: 0.8rem;
    }
    .switch {
        width: 40px;
        height: 20px;
    }
    .slider:before {
        height: 14px;
        width: 14px;
        left: 2px;
        bottom: 2px;
    }
    input:checked + .slider:before {
        transform: translateX(18px);
    }
    .card {
        padding: 20px 15px;
        margin: 0 10px;
        text-align: center;
    }
    .card h2 {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    .card p {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    .controls-area {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        margin-bottom: 20px;
    }
    .input-group {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        width: 100%;
        max-width: 300px;
    }
    .btn-main {
        width: 100%;
        max-width: 300px;
        height: 45px;
        font-size: 1rem;
        font-weight: 600;
        box-sizing: border-box;
    }
    .file-name-container {
        text-align: center;
        width: 100%;
        max-width: 300px;
    }
    .file-name {
        font-size: 0.9rem;
    }
    .input-group-compound {
        flex-direction: row;
        height: 45px;
        align-items: center;
        width: 100%;
        max-width: 300px;
        box-sizing: border-box;
    }
    .input-group-compound .label {
        border-right: 1px solid var(--border-dark);
        border-bottom: none;
        justify-content: center;
        min-width: 90px;
        flex-shrink: 0;
        font-size: 0.9rem;
        font-weight: 600;
    }
    body.light-mode .input-group-compound .label {
        border-right-color: var(--border-light);
        border-bottom: none;
    }
    .input-group-compound input[type="number"] {
        flex: 1;
        min-width: 80px;
        font-size: 1rem;
    }
    .select-wrapper {
        border-left: 1px solid var(--border-dark);
        min-width: 60px;
    }
    body.light-mode .select-wrapper {
        border-left-color: var(--border-light);
    }
    .input-group-compound select {
        width: 100%;
        text-align: center;
        padding: 0 25px 0 10px;
        font-size: 0.9rem;
        font-weight: 600;
    }
    .preview-area {
        flex-direction: column;
        align-items: center;
        gap: 20px;
        margin-top: 20px;
    }
    .image-container {
        width: 100%;
        max-width: none;
        margin: 0;
        box-sizing: border-box;
    }
    .image-container h3 {
        font-size: 1.3rem;
    }
    .image-container p {
        font-size: 0.9rem;
    }
    .download-area {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        width: 100%;
    }
    .download-area input[type="text"] {
        width: 280px !important;
        max-width: 280px !important;
        height: 40px;
        font-size: 0.9rem;
        text-align: center;
        box-sizing: border-box;
        padding: 0 15px;
        border: 1px solid var(--border-dark);
        border-radius: 6px;
        background: var(--bg-dark);
        color: var(--text-dark);
        outline: none;
    }
    body.light-mode .download-area input[type="text"] {
        background: var(--bg-light);
        border-color: var(--border-light);
        color: var(--text-light);
    }
    .download-area .btn-main {
        width: 280px !important;
        max-width: 280px !important;
        height: 40px;
        font-size: 0.9rem;
        box-sizing: border-box;
    }
}