/* Reset e Variáveis */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --dark: #1e293b;
    --gray: #64748b;
    --light-gray: #f1f5f9;
    --border: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    height: 100%;
    min-height: 100vh;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--dark);
}

body.dragging {
    background: linear-gradient(135deg, #818cf8 0%, #8b5cf6 100%);
}

body.dragging .drop-zone {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.15);
    transform: scale(1.02);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 32px 40px;
    color: var(--white);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo svg {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.format-badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.format-text {
    opacity: 0.9;
}

.selectedOutput {
    background: var(--white);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 700;
}

/* Main Content */
.main-content {
    padding: 40px;
}

/* Control Panel */
.control-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.control-group {
    background: var(--light-gray);
    padding: 24px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.control-group:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.control-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--dark);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.control-label svg {
    color: var(--primary);
}

.control-label-small {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray);
    margin-bottom: 8px;
    margin-top: 12px;
}

/* Select Input */
.select-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    background: var(--white);
    color: var(--dark);
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.select-input:hover {
    border-color: var(--primary-light);
}

.select-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Range Input */
.range-input {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.range-input::-webkit-slider-thumb:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow);
    border: none;
    transition: var(--transition);
}

.range-input::-moz-range-thumb:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.quality-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 11px;
    color: var(--gray);
    font-style: italic;
}

/* File Input */
#file-input {
    display: none;
}

.file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 14px 24px;
    background: var(--primary);
    color: var(--white);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.file-input-label:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.file-input-label:active {
    transform: translateY(0);
}

/* Number Input */
.number-input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: var(--white);
    transition: var(--transition);
    outline: none;
}

.number-input:hover {
    border-color: var(--primary-light);
}

.number-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Info Text */
.info-text {
    font-size: 13px;
    color: var(--gray);
    margin-top: 8px;
}

.resize-value {
    font-weight: 600;
    color: var(--primary);
    margin-left: 4px;
}

/* Buttons */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 32px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-danger {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 32px;
    background: var(--white);
    color: var(--danger);
    border: 2px solid var(--danger);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: var(--danger);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Resize Options */
.resize-options {
    display: flex;
    flex-direction: column;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 2px solid var(--border);
}

/* Drop Zone */
.drop-zone {
    margin: 32px 0;
    border: 3px dashed var(--border);
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    background: var(--light-gray);
    transition: var(--transition);
}

.drop-zone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.drop-zone-content svg {
    color: var(--primary);
    opacity: 0.5;
    margin-bottom: 20px;
    pointer-events: none;
}

.drop-zone-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
    pointer-events: none;
}

.drop-zone-content p {
    font-size: 14px;
    color: var(--gray);
    pointer-events: none;
}

/* Previews */
.previews {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.previews > div {
    position: relative;
    background: var(--light-gray);
    border-radius: var(--radius);
    padding: 12px;
    overflow: hidden;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.previews > div:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.previews > div img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.previews > div progress {
    width: 80%;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.previews > div progress::-webkit-progress-bar {
    background: var(--border);
    border-radius: 4px;
}

.previews > div progress::-webkit-progress-value {
    background: var(--primary);
    border-radius: 4px;
}

.previews > div progress::-moz-progress-bar {
    background: var(--primary);
    border-radius: 4px;
}

.previews > div a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    text-decoration: none;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 2px solid var(--border);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        border-radius: 16px;
    }

    .header {
        padding: 24px 20px;
    }

    .logo h1 {
        font-size: 20px;
    }

    .main-content {
        padding: 24px 20px;
    }

    .control-panel {
        grid-template-columns: 1fr;
    }

    .drop-zone {
        padding: 40px 20px;
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-buttons button {
        width: 100%;
    }

    .previews {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 18px;
    }

    .format-badge {
        font-size: 14px;
        padding: 10px 20px;
    }

    .previews {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}