/* Variables del Sistema de Diseño */
:root {
    --bg-primary: #0b0c10;
    --bg-secondary: rgba(22, 24, 37, 0.75);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    --color-primary: #6366f1; /* Indigo */
    --color-primary-glow: rgba(99, 102, 241, 0.3);
    --color-secondary: #a855f7; /* Purple */
    --color-accent: #06b6d4; /* Cyan */
    --color-accent-glow: rgba(6, 182, 212, 0.2);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --color-success: #10b981;
    --color-success-glow: rgba(16, 185, 129, 0.25);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset de Estilos */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-x: hidden;
    padding: 20px;
}

/* Fondo Glow Dinámico */
.glow-bg {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(168, 85, 247, 0.1) 40%, rgba(0,0,0,0) 70%);
    top: -10%;
    left: -10%;
    z-index: -1;
    filter: blur(80px);
    pointer-events: none;
    animation: pulseGlow 12s infinite alternate;
}

body::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, rgba(99, 102, 241, 0.05) 50%, rgba(0,0,0,0) 75%);
    bottom: -10%;
    right: -10%;
    z-index: -1;
    filter: blur(80px);
    pointer-events: none;
}

@keyframes pulseGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

/* Contenedor Principal */
.container {
    width: 100%;
    max-width: 780px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    z-index: 10;
}

main {
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 10px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-icon {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #ff0055, #ff5500);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 10px rgba(255, 0, 85, 0.3));
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo h1 span {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 400;
}

/* Tarjeta Base (Glassmorphism) */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Search Card */
.search-card {
    padding: 8px; /* Reducido para dar aspecto de barra integrada */
    border-radius: 50px; /* Redondeado completo estilo buscador */
}

#search-form {
    width: 100%;
}

.input-group {
    display: flex;
    align-items: center;
    width: 100%;
    position: relative;
    padding-left: 20px;
}

.input-icon {
    color: var(--text-muted);
    font-size: 1.2rem;
    margin-right: 15px;
    transition: var(--transition);
}

#video-url {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1.05rem;
    padding: 18px 0;
    min-width: 0;
}

#video-url::placeholder {
    color: var(--text-muted);
}

#video-url:focus ~ .input-icon {
    color: var(--color-primary);
}

#search-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: #fff;
    border: none;
    outline: none;
    border-radius: 40px;
    padding: 14px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    box-shadow: 0 4px 15px var(--color-primary-glow);
    margin-right: 6px;
}

#search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-primary-glow), 0 0 12px rgba(168, 85, 247, 0.4);
}

#search-btn:active {
    transform: translateY(0);
}

/* Mensajes de Error */
.error-msg {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-error);
    background: var(--color-error-bg);
    border: 1px solid rgba(239, 108, 108, 0.2);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    margin-top: 15px;
    font-size: 0.95rem;
}

/* Loader */
.loader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: var(--color-primary);
    border-right-color: var(--color-secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    filter: drop-shadow(0 0 8px var(--color-primary-glow));
}

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

.loader-container p {
    color: var(--text-secondary);
    font-size: 1rem;
    animation: pulseText 1.5s infinite ease-in-out;
}

@keyframes pulseText {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* Preview Card */
.preview-card {
    display: flex;
    flex-direction: column;
}

.preview-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 25px;
}

@media (max-width: 640px) {
    .preview-layout {
        grid-template-columns: 1fr;
    }
}

.thumbnail-wrapper {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 16/9;
    background-color: #000;
    border: 1px solid var(--border-color);
}

.video-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.duration-badge {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.info-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.video-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.channel-name {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.channel-name i {
    font-size: 1.1rem;
    color: var(--color-primary);
}

.divider {
    height: 1px;
    background: var(--border-color);
    margin: 20px 0;
}

/* Download Configuration */
.download-config {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.format-toggle {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: var(--radius-sm);
    gap: 4px;
}

.toggle-btn {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-secondary);
    padding: 10px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.toggle-btn.active {
    background: linear-gradient(135deg, var(--color-primary) 0%, rgba(99, 102, 241, 0.6) 100%);
    color: #fff;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.2);
}

.toggle-btn:hover:not(.active) {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.quality-select-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.quality-select-wrapper label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.select-custom {
    position: relative;
    width: 100%;
}

.quality-select {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: var(--transition);
}

.quality-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.select-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.btn {
    width: 100%;
    padding: 14px 20px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    outline: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--color-primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-primary-glow), 0 0 15px rgba(168, 85, 247, 0.3);
}

/* Progress Card */
.progress-card {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-right: 36px;
}

.progress-header h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 75%;
}

.badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: 10px;
    width: 0%;
    transition: width 0.3s ease-out;
    box-shadow: 0 0 8px var(--color-accent-glow);
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

@media (max-width: 500px) {
    .progress-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-box {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: center;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
}

.stat-val {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.progress-info-msg {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.progress-info-msg i {
    color: var(--color-accent);
}

/* Success Card */
.success-preview-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 32px;
    align-items: center;
    width: 100%;
}

.success-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-success);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 8px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.25);
    padding: 4px 10px;
    border-radius: 12px;
    width: fit-content;
}

.success-badge i {
    font-size: 0.9rem;
}

.success-info-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
}

.success-filename {
    color: var(--text-muted);
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 6px 12px;
    border-radius: 6px;
    word-break: break-all;
    border: 1px solid var(--border-color);
    margin-top: 6px;
    margin-bottom: 16px;
    display: inline-block;
    max-width: 95%;
}

.success-actions {
    display: flex;
    gap: 12px;
    width: 100%;
    max-width: 320px;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--color-success-glow);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-success-glow);
}

@media (max-width: 768px) {
    .success-preview-layout {
        grid-template-columns: 1fr;
        gap: 20px;
        text-align: center;
    }
    .success-info-wrapper {
        text-align: center;
        align-items: center;
    }
    .success-badge {
        margin-left: auto;
        margin-right: auto;
    }
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* Footer */
footer {
    text-align: center;
    padding-top: 10px;
}

footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Historial de Descargas (Multi-cards) */
#downloads-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
}

.download-card {
    position: relative;
    transition: var(--transition);
}

.close-btn {
    position: absolute;
    top: 18px;
    right: 18px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.15rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 20;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    outline: none;
}

.close-btn:hover {
    color: var(--color-error);
    background: rgba(239, 68, 68, 0.15);
}

/* Helpers */
.hidden {
    display: none !important;
}