/* ==========================================================================
   ViralKit - Sistema de Diseño Glassmorphism Premium (Tema Oscuro)
   ========================================================================== */

/* Variables de Diseño */
:root {
    --bg: #0b0c10;
    --surface: rgba(22, 24, 37, 0.7);
    --surface-hover: rgba(30, 32, 50, 0.8);
    --surface-solid: #161825;
    --surface-2: rgba(255, 255, 255, 0.03);
    --surface-3: rgba(255, 255, 255, 0.06);
    --text: #f3f4f6;
    --text-soft: #9ca3af;
    --text-faint: #6b7280;
    --primary: #6366f1;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent: #ec4899;
    --accent-gradient: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
    --teal: #14b8a6;
    --teal-gradient: linear-gradient(135deg, #14b8a6 0%, #10b981 100%);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    --radius: 24px;
    --radius-sm: 14px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    --bg-gradient: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
                   radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.08) 0px, transparent 50%);
    --topbar-bg: rgba(11, 12, 16, 0.8);
    --title-gradient: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
}

/* Adaptación automática del sistema */
@media (prefers-color-scheme: light) {
    :root {
        --bg: #f8fafc;
        --surface: rgba(255, 255, 255, 0.75);
        --surface-hover: rgba(255, 255, 255, 0.85);
        --surface-solid: #ffffff;
        --surface-2: rgba(15, 23, 42, 0.04);
        --surface-3: rgba(15, 23, 42, 0.08);
        --text: #0b0f19;
        --text-soft: #334155;
        --text-faint: #57687e;
        --primary: #4f46e5;
        --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
        --accent: #db2777;
        --accent-gradient: linear-gradient(135deg, #db2777 0%, #e11d48 100%);
        --teal: #0d9488;
        --teal-gradient: linear-gradient(135deg, #0d9488 0%, #059669 100%);
        --border: rgba(15, 23, 42, 0.09);
        --border-hover: rgba(15, 23, 42, 0.18);
        --shadow: 0 20px 40px rgba(15, 23, 42, 0.06);
        --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.04);
        
        --bg-gradient: radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.06) 0px, transparent 50%),
                       radial-gradient(at 100% 100%, rgba(219, 39, 119, 0.04) 0px, transparent 50%);
        --topbar-bg: rgba(255, 255, 255, 0.8);
        --title-gradient: linear-gradient(135deg, #0f172a 0%, #334155 100%);
    }
}

/* Selección explícita por data-theme */
html[data-theme="light"] {
    --bg: #f8fafc;
    --surface: rgba(255, 255, 255, 0.75);
    --surface-hover: rgba(255, 255, 255, 0.85);
    --surface-solid: #ffffff;
    --surface-2: rgba(15, 23, 42, 0.04);
    --surface-3: rgba(15, 23, 42, 0.08);
    --text: #0b0f19;
    --text-soft: #334155;
    --text-faint: #57687e;
    --primary: #4f46e5;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --accent: #db2777;
    --accent-gradient: linear-gradient(135deg, #db2777 0%, #e11d48 100%);
    --teal: #0d9488;
    --teal-gradient: linear-gradient(135deg, #0d9488 0%, #059669 100%);
    --border: rgba(15, 23, 42, 0.09);
    --border-hover: rgba(15, 23, 42, 0.18);
    --shadow: 0 20px 40px rgba(15, 23, 42, 0.06);
    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.04);
    
    --bg-gradient: radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.06) 0px, transparent 50%),
                   radial-gradient(at 100% 100%, rgba(219, 39, 119, 0.04) 0px, transparent 50%);
    --topbar-bg: rgba(255, 255, 255, 0.8);
    --title-gradient: linear-gradient(135deg, #0f172a 0%, #334155 100%);
}

html[data-theme="dark"] {
    --bg: #0b0c10;
    --surface: rgba(22, 24, 37, 0.7);
    --surface-hover: rgba(30, 32, 50, 0.8);
    --surface-solid: #161825;
    --surface-2: rgba(255, 255, 255, 0.03);
    --surface-3: rgba(255, 255, 255, 0.06);
    --text: #f3f4f6;
    --text-soft: #9ca3af;
    --text-faint: #6b7280;
    --primary: #6366f1;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent: #ec4899;
    --accent-gradient: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
    --teal: #14b8a6;
    --teal-gradient: linear-gradient(135deg, #14b8a6 0%, #10b981 100%);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    
    --bg-gradient: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
                   radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.08) 0px, transparent 50%);
    --topbar-bg: rgba(11, 12, 16, 0.8);
    --title-gradient: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
}

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

html {
    scroll-behavior: smooth;
    color-scheme: light dark;
}

body {
    background: var(--bg);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text);
    font-family: 'Plus Jakarta Sans', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   Barra Superior (Topbar)
   ========================================================================== */
.topbar {
    background: var(--topbar-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: var(--transition);
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-decoration: none;
    color: var(--text);
}

.brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    background: var(--primary-gradient);
    padding: 2px;
}

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

.topbar-tag {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-soft);
    background: var(--surface-2);
    padding: 6px 14px;
    border-radius: 100px;
    border: 1px solid var(--border);
}

@media (max-width: 640px) {
    .topbar-tag { display: none; }
}

/* Botón de Selección de Tema */
.btn-theme {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-theme:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.btn-theme i {
    color: var(--primary);
    font-size: 1rem;
}

/* ==========================================================================
   Navegación Horizontal
   ========================================================================== */
.nav-wrap {
    position: sticky;
    top: 73px;
    z-index: 40;
    background: var(--topbar-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0 8px;
    transition: var(--transition);
}

.nav-container {
    position: relative;
}

nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 4px 4px 10px 4px;
    scrollbar-width: thin; /* Firefox */
    scrollbar-color: var(--border) transparent;
}

nav::-webkit-scrollbar {
    height: 4px;
    display: block;
}

nav::-webkit-scrollbar-track {
    background: transparent;
}

nav::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

nav::-webkit-scrollbar-thumb:hover {
    background: var(--text-faint);
}

.nav-link {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--surface);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    color: var(--text-soft);
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 100px;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.nav-link i {
    font-size: 0.85rem;
}

.nav-link:hover {
    border-color: var(--primary);
    color: var(--text);
    background: var(--surface-hover);
    transform: translateY(-1px);
}

.nav-link.active {
    background: var(--primary-gradient);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

/* En tablets y laptops/desktops, envolvemos los botones en múltiples líneas */
@media (min-width: 768px) {
    nav {
        flex-wrap: wrap;
        justify-content: center;
        overflow-x: visible;
        padding-bottom: 4px;
    }
}

/* ==========================================================================
   Layout Principal (2 Columnas)
   ========================================================================== */
.layout-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-top: 16px;
}

@media (min-width: 1024px) {
    .layout-grid {
        grid-template-columns: 7fr 3fr;
    }
}

.main-content {
    min-width: 0; /* Evita desbordamiento en flex/grid */
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.sidebar-inner {
    position: sticky;
    top: 170px; /* sticky debajo del topbar + nav-wrap */
    display: flex;
    flex-direction: column;
    gap: 28px;
}

/* ==========================================================================
   Secciones y Encabezados
   ========================================================================== */
.page {
    display: none;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.page.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-head {
    text-align: center;
    max-width: 680px;
    margin: 10px auto 32px;
}

.page-icon {
    display: none;
    width: 60px;
    height: 60px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.25);
}

.page-icon.pink {
    background: rgba(236, 72, 153, 0.15);
    color: var(--accent);
    border: 1px solid rgba(236, 72, 153, 0.25);
}

.page-icon.teal {
    background: rgba(20, 184, 166, 0.15);
    color: var(--teal);
    border: 1px solid rgba(20, 184, 166, 0.25);
}

.page-head h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.8px;
    margin-bottom: 12px;
    background: var(--title-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-head p {
    color: var(--text-soft);
    font-size: 1.05rem;
}

.page-head strong {
    color: var(--text);
}

/* ==========================================================================
   Tarjetas (Cards)
   ========================================================================== */
.card {
    background: var(--surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-hover);
}

@media (max-width: 640px) {
    .card {
        padding: 24px 20px;
    }
}

/* ==========================================================================
   Inputs, Formularios y Botones
   ========================================================================== */
.input-group {
    display: flex;
    background: var(--surface-2);
    border: 1.5px solid var(--border);
    border-radius: 18px;
    padding: 6px;
    max-width: 640px;
    margin: 0 auto 12px;
    transition: var(--transition);
    align-items: center;
}

.input-group:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
    background: var(--surface-3);
}

.input-group input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    padding: 14px 18px;
    color: var(--text);
    outline: none;
    font-size: 1rem;
    font-family: inherit;
}

.input-group input::placeholder {
    color: var(--text-faint);
}

/* Contenedor Unificado TikTok Tools */
.input-container-unified {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 640px;
    margin: 0 auto 12px;
}

.input-container-unified input {
    width: 100%;
    background: var(--surface-2);
    border: 1.5px solid var(--border);
    border-radius: 18px;
    padding: 16px 20px;
    color: var(--text);
    outline: none;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.input-container-unified input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
    background: var(--surface-3);
}

.unified-btn-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 480px) {
    .unified-btn-group {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

.btn-main {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 14px 28px;
    border-radius: 14px;
    font-weight: 800;
    font-size: 0.9rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.btn-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

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

.btn-block {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-top: 16px;
}

.btn-accent {
    background: var(--accent-gradient);
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.2);
}

.btn-accent:hover {
    box-shadow: 0 8px 24px rgba(236, 72, 153, 0.4);
}

.hint {
    font-size: 0.8rem;
    color: var(--text-faint);
    margin-top: 12px;
}

/* Spinner Loader */
.loader {
    display: none;
    width: 44px;
    height: 44px;
    border: 4px solid var(--surface-3);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s infinite linear;
    margin: 28px auto 4px;
}

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

/* ==========================================================================
   Resultados y Gráficos
   ========================================================================== */
.res-box {
    display: none;
    margin-top: 36px;
    padding: 32px 24px;
    background: var(--surface-2);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    animation: slideUp 0.4s ease forwards;
}

.res-title {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--primary);
    text-align: left;
    display: flex;
    align-items: center;
    gap: 10px;
}

#video-preview,
#video-preview-ig,
#video-preview-yt,
#video-preview-fb {
    width: 100%;
    max-width: 280px;
    border-radius: 20px;
    border: 4px solid rgba(255, 255, 255, 0.05);
    margin: 0 auto 24px;
    background: #000;
    box-shadow: var(--shadow);
    display: block;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 560px;
    margin: 0 auto 28px;
}

@media (min-width: 560px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-item {
    background: var(--surface-solid);
    padding: 16px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 700;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.stat-item span {
    font-size: 1.1rem;
    font-weight: 800;
}

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

.stat-item.pink i { color: var(--accent); }
.stat-item.teal i { color: var(--teal); }

.dl-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.dl-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 0.9rem;
    text-decoration: none;
    color: #fff;
    background: var(--accent-gradient);
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(236, 72, 153, 0.3);
    transition: var(--transition);
}

.dl-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(236, 72, 153, 0.5);
}

.dl-link.alt {
    background: var(--surface-solid);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    color: var(--text);
}

.dl-link.alt:hover {
    border-color: var(--primary);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

#download-status {
    display: none;
    margin: 20px auto 0;
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    max-width: 560px;
    font-weight: 700;
    font-size: 0.9rem;
    text-align: center;
    background: rgba(20, 184, 166, 0.15);
    color: var(--teal);
    border: 1px solid rgba(20, 184, 166, 0.25);
}

/* ============ Transcripciones ============ */
.script-area {
    width: 100%;
    height: 320px;
    background: var(--surface-solid);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 20px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    resize: none;
    line-height: 1.65;
    outline: none;
    transition: var(--transition);
}

.script-area:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* ============ Tendencias (Nichos) ============ */
.grid-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    text-align: left;
    margin-top: 24px;
}

.trend-card {
    background: var(--surface-solid);
    padding: 20px;
    border-radius: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.trend-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow);
}

.trend-body {
    display: flex;
    gap: 16px;
    margin-bottom: 18px;
}

.trend-body img {
    width: 80px;
    height: 112px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
    background: var(--surface-2);
    border: 1px solid var(--border);
}

.trend-info {
    flex: 1;
    min-width: 0;
}

.trend-age {
    background: rgba(20, 184, 166, 0.15);
    color: var(--teal);
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 6px;
    display: inline-block;
    margin-bottom: 8px;
}

.trend-info h4 {
    font-size: 0.9rem;
    line-height: 1.4;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text);
}

.trend-info p {
    font-size: 0.8rem;
    color: var(--text-soft);
}

.trend-info p i {
    color: var(--primary);
    margin-right: 2px;
}

.niche-actions {
    display: flex;
    gap: 10px;
}

.mini-btn {
    flex: 1;
    text-align: center;
    padding: 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 800;
    text-decoration: none;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: var(--transition);
}

.mini-btn.watch {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
}

.mini-btn.watch:hover {
    background: var(--surface-3);
    border-color: var(--text-soft);
}

.mini-btn.dl {
    background: var(--primary-gradient);
    color: #fff;
}

.mini-btn.dl:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ============ Calculadoras ============ */
.form-stack {
    max-width: 440px;
    margin: 0 auto;
    text-align: left;
}

.field-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-soft);
    margin-bottom: 8px;
}

.field {
    width: 100%;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    color: var(--text);
    padding: 14px 16px;
    margin-bottom: 20px;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.field:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
    background: var(--surface-3);
}

.big-result {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1.5px;
    line-height: 1.1;
}

.big-result-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-soft);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 8px;
}

/* ============ Perfil HD ============ */
#avatar-prof {
    width: 190px;
    height: 190px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--surface-solid);
    box-shadow: var(--shadow);
    margin: 8px auto 24px;
    background: var(--surface-2);
    display: block;
}

/* ============ Hashtags ============ */
.tag-chip {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 700;
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: var(--transition);
}

.tag-chip:hover {
    background: rgba(99, 102, 241, 0.25);
    transform: translateY(-1px);
}

/* ==========================================================================
   Contenido Expandido (SEO y Educación)
   ========================================================================== */
.educational-content {
    margin-top: 48px;
    text-align: left;
    border-top: 1px solid var(--border);
    padding-top: 40px;
}

.educational-content h2 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 24px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 12px;
}

.educational-content p {
    color: var(--text-soft);
    font-size: 1rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.educational-content strong {
    color: var(--text);
}

/* Info Infographics / Cards */
.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 28px 0;
}

@media (min-width: 640px) {
    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.info-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 24px;
    text-align: left;
    transition: var(--transition);
}

.info-card:hover {
    border-color: var(--border-hover);
    background: var(--surface-3);
}

.info-card-icon {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.info-card.pink .info-card-icon { color: var(--accent); }
.info-card.teal .info-card-icon { color: var(--teal); }

.info-card h3 {
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--text);
}

.info-card p {
    font-size: 0.9rem;
    color: var(--text-soft);
    margin-bottom: 0;
    line-height: 1.5;
}

/* FAQ Accordion */
.faq-section {
    margin-top: 40px;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    background: var(--surface-2);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-item summary {
    cursor: pointer;
    padding: 18px 24px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    user-select: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '\f0fe'; /* FontAwesome Plus */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary);
    font-size: 0.9rem;
    transition: transform 0.3s;
}

.faq-item[open] {
    background: rgba(255, 255, 255, 0.01);
}

.faq-item[open] summary::after {
    content: '\f068'; /* FontAwesome Minus */
}

.faq-item div {
    padding: 0 24px 20px;
    font-size: 0.92rem;
    color: var(--text-soft);
    line-height: 1.6;
}

/* ==========================================================================
   Espacios Publicitarios (Publicidad Mock)
   ========================================================================== */
.ad-slot {
    margin: 32px auto;
    border: 1px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    text-align: center;
    background: rgba(255, 255, 255, 0.01);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.ad-slot:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.02);
}

/* Tipos de Bloques */
.ad-top-banner {
    max-width: 970px;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
}

.ad-content {
    max-width: 100%;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.ad-sidebar {
    width: 100%;
    min-height: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.ad-slot-label {
    position: absolute;
    top: 4px;
    left: 8px;
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.ad-slot-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-faint);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ad-slot-placeholder i {
    font-size: 1.4rem;
}

/* ==========================================================================
   Componentes Laterales (Sidebar Widgets)
   ========================================================================== */
.widget {
    background: var(--surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.widget-title {
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.widget-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.widget-item {
    font-size: 0.85rem;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.widget-item i {
    color: var(--primary);
    margin-top: 4px;
    font-size: 0.8rem;
}

.widget-item span {
    color: var(--text-soft);
    line-height: 1.4;
}

.widget-item strong {
    color: var(--text);
}

/* ==========================================================================
   Notificaciones Toast
   ========================================================================== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #1e1b4b;
    border: 1px solid rgba(99, 102, 241, 0.4);
    color: #e0e7ff;
    padding: 14px 24px;
    border-radius: 14px;
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 100;
    max-width: 90vw;
    text-align: center;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-success {
    background: #064e3b;
    border-color: rgba(16, 185, 129, 0.4);
    color: #d1fae5;
}

.toast-error {
    background: #7f1d1d;
    border-color: rgba(239, 68, 68, 0.4);
    color: #fee2e2;
}

/* ==========================================================================
   Blog y Artículos
   ========================================================================== */
.blog-section-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin: 56px 0 8px;
}

.blog-section-sub {
    text-align: center;
    color: var(--text-soft);
    font-size: 1rem;
    margin-bottom: 32px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    text-align: left;
}

.blog-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow);
}

.blog-cover {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
}

.blog-cover.c1 { background: linear-gradient(135deg, #6366f1, #a855f7); }
.blog-cover.c2 { background: linear-gradient(135deg, #ec4899, #f43f5e); }
.blog-cover.c3 { background: linear-gradient(135deg, #14b8a6, #10b981); }
.blog-cover.c4 { background: linear-gradient(135deg, #f59e0b, #ec4899); }

.blog-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-tag {
    display: inline-block;
    align-self: flex-start;
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.blog-body h3 {
    font-size: 1.1rem;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 8px;
    color: var(--text);
}

.blog-body p {
    font-size: 0.88rem;
    color: var(--text-soft);
    flex: 1;
    line-height: 1.5;
}

.read-more {
    margin-top: 18px;
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.blog-card:hover .read-more {
    color: #a855f7;
}

.blog-center-btn {
    text-align: center;
    margin-top: 36px;
}

/* Artículo individual */
.article-page {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    box-shadow: var(--shadow);
    text-align: left;
}

@media (max-width: 640px) {
    .article-page {
        padding: 28px 20px;
    }
}

.article-page h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.8px;
    line-height: 1.25;
    margin-bottom: 12px;
    color: var(--text);
}

.article-meta {
    font-size: 0.85rem;
    color: var(--text-faint);
    margin-bottom: 28px;
    display: flex;
    gap: 16px;
}

.article-meta i {
    color: var(--primary);
}

.article-page h2 {
    font-size: 1.4rem;
    font-weight: 800;
    margin: 36px 0 16px;
    color: var(--text);
}

.article-page p {
    color: var(--text-soft);
    font-size: 1.05rem;
    margin-bottom: 20px;
    line-height: 1.75;
}

.article-page ul, .article-page ol {
    margin: 0 0 24px 24px;
    color: var(--text-soft);
    font-size: 1.05rem;
}

.article-page li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.article-page strong {
    color: var(--text);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-soft);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 10px 18px;
    border-radius: 100px;
    cursor: pointer;
    margin-bottom: 28px;
    transition: var(--transition);
}

.back-btn:hover {
    border-color: var(--primary);
    color: var(--text);
    background: var(--surface-hover);
}

.tool-cta {
    display: block;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-sm);
    padding: 24px;
    margin: 32px 0;
    text-decoration: none;
    color: var(--text);
    font-size: 1rem;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    width: 100%;
    transition: var(--transition);
}

.tool-cta:hover {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.tool-cta strong {
    color: var(--primary);
    font-size: 1.1rem;
    display: inline-block;
    margin-bottom: 4px;
}

/* ==========================================================================
   Social Media Optimizer Tabs and Cards
   ========================================================================== */
.social-optimizer {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.social-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
}

.social-tabs::-webkit-scrollbar {
    display: none;
}

.social-tab {
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-soft);
    padding: 8px 16px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.social-tab:hover {
    background: var(--surface-3);
    color: var(--text);
    border-color: var(--border-hover);
}

.social-tab.active {
    background: var(--primary-gradient);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.optimizer-card {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: left;
}

.optimizer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 12px;
}

@media (min-width: 640px) {
    .optimizer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.optimizer-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
}

.optimizer-item i {
    color: var(--teal);
    font-size: 1.05rem;
    margin-top: 2px;
}

.optimizer-item strong {
    color: var(--text);
    display: block;
    margin-bottom: 2px;
}

.optimizer-item span {
    color: var(--text-soft);
}

.optimizer-desc {
    font-size: 0.85rem;
    color: var(--text-soft);
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--border);
    line-height: 1.5;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    margin-top: 80px;
    padding: 48px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-faint);
    background: var(--surface-solid);
}

footer p {
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--text-soft);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-selector-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
    background: var(--surface);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    transition: var(--transition);
}

.lang-selector-wrap:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
}

.lang-icon {
    color: var(--primary);
    font-size: 0.95rem;
    margin-right: 6px;
    pointer-events: none;
}

.select-lang {
    background: transparent;
    border: none;
    color: var(--text);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    padding-right: 12px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.lang-selector-wrap::after {
    content: "\f0d7";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 0.8rem;
    color: var(--text-soft);
    position: absolute;
    right: 10px;
    pointer-events: none;
}