/* ===================================
   LIQUID GLASS - FUTURISTIC DESIGN
   =================================== */

/* Reset y variables globales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Paleta de colores futurista */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --shadow-hover: 0 16px 64px 0 rgba(31, 38, 135, 0.5);
    --blur-sm: blur(4px);
    --blur-md: blur(8px);
    --blur-lg: blur(12px);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-glass: 20px;
    --border-radius-card: 24px;
}

/* Background animado */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0f0c29;
    background: linear-gradient(to bottom, #24243e, #302b63, #0f0c29);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Partículas animadas de fondo */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 219, 98, 0.2) 0%, transparent 50%);
    animation: floatingBackground 20s ease infinite;
    z-index: -1;
}

@keyframes floatingBackground {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-20px, -20px) rotate(1deg); }
    66% { transform: translate(20px, -10px) rotate(-1deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header con efecto glassmorphism */
.header {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border-bottom: 1px solid var(--glass-border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-glass);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 32px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: -4px;
    text-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
}

.logo span {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-btn {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    padding: 14px 28px;
    border-radius: var(--border-radius-glass);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: left 0.4s ease;
    z-index: -1;
}

.nav-btn:hover::before {
    left: 0;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Main content */
.main {
    padding: 60px 0;
    min-height: calc(100vh - 100px);
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    background: linear-gradient(135deg, #ffffff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(255, 255, 255, 0.3);
}

/* Tools Section */
.tools-section {
    text-align: center;
}

.tools-category {
    margin-bottom: 80px;
}

.category-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 2px;
    box-shadow: 0 0 20px rgba(79, 172, 254, 0.5);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.tool-card {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-card);
    padding: 48px 32px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-glass);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.tool-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: scale(0);
    transition: transform 0.6s ease;
    border-radius: 50%;
}

.tool-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: rgba(255, 255, 255, 0.3);
}

.tool-card:hover::before {
    opacity: 0.1;
}

.tool-card:hover::after {
    transform: scale(1);
}

.tool-icon {
    font-size: 56px;
    margin-bottom: 20px;
    line-height: 1;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(79, 172, 254, 0.5));
}

.tool-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.tool-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Upload Section */
.upload-section {
    max-width: 900px;
    margin: 0 auto;
}

.back-btn {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
    padding: 12px 20px;
    border-radius: var(--border-radius-glass);
}

.back-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateX(-4px);
}

.upload-area {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border: 2px dashed var(--glass-border);
    border-radius: var(--border-radius-card);
    padding: 80px 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: rgba(79, 172, 254, 0.5);
    transform: scale(1.01);
}

.upload-area:hover::before,
.upload-area.dragover::before {
    opacity: 0.1;
}

.upload-icon {
    font-size: 72px;
    margin-bottom: 24px;
    background: var(--secondary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 30px rgba(240, 147, 251, 0.5));
}

.upload-area h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 16px;
}

.upload-btn,
.process-btn,
.download-btn,
.new-process-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 18px 36px;
    border-radius: var(--border-radius-glass);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-glass);
}

.upload-btn::before,
.process-btn::before,
.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.6s ease;
}

.upload-btn:hover::before,
.process-btn:hover::before,
.download-btn:hover::before {
    left: 100%;
}

.upload-btn:hover,
.process-btn:hover,
.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.new-process-btn {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.new-process-btn:hover {
    background: var(--accent-gradient);
    border-color: transparent;
    transform: translateY(-3px);
}

/* Files List */
.files-list {
    margin-top: 40px;
    padding: 32px;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow-glass);
}

.files-list h3 {
    margin-bottom: 24px;
    font-size: 20px;
    color: var(--text-primary);
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-glass);
    margin-bottom: 12px;
    transition: var(--transition);
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(4px);
}

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

.file-icon {
    font-size: 28px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.file-size {
    font-size: 14px;
    color: var(--text-secondary);
}

.remove-file {
    background: var(--secondary-gradient);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: var(--border-radius-glass);
    cursor: pointer;
    font-size: 12px;
    transition: var(--transition);
    font-weight: 500;
}

.remove-file:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(245, 87, 108, 0.4);
}

/* Progress */
.progress-container {
    margin-top: 40px;
    text-align: center;
    padding: 32px;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-card);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 20px;
    position: relative;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    border-radius: 6px;
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { opacity: 0.8; }
    50% { opacity: 1; }
    100% { opacity: 0.8; }
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 6px;
    width: 0%;
    transition: width 0.4s ease;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: progressShimmer 1.5s infinite;
}

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

.progress-text {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Result */
.result-container {
    margin-top: 40px;
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border: 1px solid rgba(79, 172, 254, 0.3);
    border-radius: var(--border-radius-card);
    text-align: center;
    box-shadow: 0 0 40px rgba(79, 172, 254, 0.2);
    position: relative;
    overflow: hidden;
}

.result-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
}

.result-container h3 {
    color: var(--text-primary);
    margin-bottom: 32px;
    font-size: 24px;
    font-weight: 600;
}

.result-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Modal */
.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    backdrop-filter: var(--blur-lg);
    -webkit-backdrop-filter: var(--blur-lg);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-lg);
    -webkit-backdrop-filter: var(--blur-lg);
    border: 1px solid var(--glass-border);
    margin: 10% auto;
    padding: 40px;
    border-radius: var(--border-radius-card);
    width: 90%;
    max-width: 400px;
    position: relative;
    box-shadow: var(--shadow-hover);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: 32px;
    text-align: center;
    font-size: 24px;
    font-weight: 600;
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-content input {
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-glass);
    font-size: 16px;
    transition: var(--transition);
    color: var(--text-primary);
}

.modal-content input::placeholder {
    color: var(--text-secondary);
}

.modal-content input:focus {
    outline: none;
    border-color: rgba(79, 172, 254, 0.5);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 20px rgba(79, 172, 254, 0.3);
}

.login-submit {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 18px;
    border-radius: var(--border-radius-glass);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    box-shadow: var(--shadow-glass);
}

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

.modal-note {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .upload-area {
        padding: 60px 24px;
    }

    .result-actions {
        flex-direction: column;
    }

    .download-btn,
    .new-process-btn {
        width: 100%;
        justify-content: center;
    }

    .section-title {
        font-size: 32px;
    }

    .tool-icon {
        font-size: 48px;
    }

    .header .container {
        flex-direction: column;
        gap: 16px;
    }
}

/* Animaciones globales */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in-top {
    animation: slideInFromTop 0.6s ease-out;
}

.slide-in-bottom {
    animation: slideInFromBottom 0.6s ease-out;
}

.scale-in {
    animation: scaleIn 0.5s ease-out;
}

/* Loading state */
.loading {
    pointer-events: none;
    opacity: 0.7;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Estados personalizados */
.glass-hover:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Efecto de onda al hacer clic */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.ripple:active::before {
    width: 300px;
    height: 300px;
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-gradient);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-gradient);
}