:root {
    --primary-color: #0f172a;
    --accent-color: #3b82f6;
    --text-main: #334155;
    --text-light: #64748b;
    --bg-app: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --accent-soft: rgba(59, 130, 246, 0.08);
}

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

body,
html {
    height: 100vh;
    overflow: hidden;
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background: var(--bg-app);
}

.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

/* Header & Logo */
header {
    display: flex;
    justify-content: center;
    padding-bottom: 2rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.icon-shape {
    width: 18px;
    height: 18px;
    border: 3px solid #fff;
    border-radius: 2px;
    position: relative;
}

.icon-shape::after {
    content: '';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 10px;
    height: 10px;
    background: var(--accent-color);
    transform: rotate(45deg);
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--accent-color);
}

.version-badge {
    font-size: 0.7rem;
    background: var(--accent-soft);
    color: var(--accent-color);
    padding: 2px 8px;
    border-radius: 5px;
    font-weight: 800;
    position: absolute;
    top: -12px;
    right: -45px;
}

/* Main Content - Central Card */
main {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.utility-card {
    background: white;
    width: 100%;
    max-width: 550px;
    border-radius: 28px;
    padding: 3rem;
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
}

.tool-selector-container {
    margin-bottom: 2rem;
}

.tool-selector-container label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.75rem;
}

.searchable-select {
    position: relative;
}

#tool-search {
    width: 100%;
    padding: 1rem 1.25rem;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    background: #f8fafc;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: all 0.2s;
}

#tool-search:focus {
    border-color: var(--accent-color);
    background: white;
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.dropdown-content {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    max-height: 250px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* Tool Status Badges */
.status-badge {
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    margin-left: 10px;
}

.status-badge.ready {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* Compression Slider */
.compression-container {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.compression-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.slider {
    width: 100%;
    height: 6px;
    background: #cbd5e1;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

/* Tool Options */
.tool-options {
    margin-bottom: 2rem;
}

.option-group {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.option-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.text-input-bar {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: all 0.2s;
}

.text-input-bar:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.slider {
    width: 100%;
    height: 6px;
    background: #cbd5e1;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.dropdown-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* File List Styles */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
    max-height: 200px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.file-item {
    display: flex;
    align-items: center;
    background: #f8fafc;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    position: relative;
    transition: all 0.2s;
}

.file-item:hover {
    border-color: var(--accent-color);
    background: white;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.file-icon {
    width: 24px;
    height: 24px;
    margin-right: 0.75rem;
    color: var(--text-light);
}

.file-info {
    flex-grow: 1;
    overflow: hidden;
}

.file-name {
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-main);
}

.file-size {
    font-size: 0.75rem;
    color: var(--text-light);
}

.remove-file-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    color: var(--text-light);
    border-radius: 50%;
    cursor: pointer;
    margin-left: 0.5rem;
    transition: all 0.2s;
}

.remove-file-btn:hover {
    background: #fee2e2;
    color: #ef4444;
}

.file-count {
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: -1.5rem;
    margin-bottom: 2rem;
    font-weight: 600;
}

/* Scrollbar for file list */
.file-list::-webkit-scrollbar {
    width: 6px;
}

.file-list::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.file-list::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.file-list::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.dropdown-item:hover {
    background: var(--accent-soft);
    color: var(--accent-color);
}

.dropdown-item span {
    font-size: 0.8rem;
    opacity: 0.5;
}

.active-tool-banner {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    background: #f8fafc;
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
}

#current-tool-icon {
    width: 32px;
    height: 32px;
    background: var(--accent-soft);
    color: var(--accent-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
}

#current-tool-name {
    font-size: 1.1rem;
    font-weight: 700;
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 2rem;
}

.upload-zone:hover {
    border-color: var(--accent-color);
    background: var(--accent-soft);
}

.upload-icon {
    width: 44px;
    height: 44px;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.upload-text {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.upload-text span {
    color: var(--accent-color);
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-light);
}

.action-btn {
    width: 100%;
    padding: 1.1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 14px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn:hover {
    background: #1e293b;
    transform: translateY(-2px);
}

.hidden {
    display: none;
}

/* Footer */
footer {
    padding-top: 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-light);
    font-size: 0.85rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 1.5rem;
}

.footer-links a:hover {
    color: var(--accent-color);
}

@media (max-height: 750px) {
    .app-container {
        padding: 1rem;
    }

    .utility-card {
        padding: 2rem;
    }

    .upload-zone {
        padding: 2rem;
    }
}