/* ============================================
   VARIABLES GLOBALES
============================================ */

:root {
    --radius: 18px;
    --radius-lg: 26px;

    --shadow-soft: 8px 8px 18px rgba(0,0,0,0.08),
                   -8px -8px 18px rgba(255,255,255,0.8);

    --shadow-inset: inset 6px 6px 12px rgba(0,0,0,0.08),
                    inset -6px -6px 12px rgba(255,255,255,0.8);

    --shadow-hover: 12px 12px 28px rgba(0,0,0,0.12),
                    -12px -12px 28px rgba(255,255,255,0.9);

    --glass-bg: rgba(255,255,255,0.45);
    --glass-border: rgba(255,255,255,0.6);
    --glass-blur: blur(18px);

    /* Paleta suave premium */
    --color-1: #e3e7ff;
    --color-2: #e8fff4;
    --color-3: #fff4e3;
    --color-4: #ffe3e3;
    --color-5: #e3f4ff;
    --color-6: #f0e3ff;

    --text-strong: #1a1a1a;
    --text-soft: #4b5563;

    --tool-btn-bg: rgba(255,255,255,0.35);
    --tool-btn-bg-hover: rgba(255,255,255,0.55);
    --divider-color: rgba(0,0,0,0.08);
}

body.dark-mode {
    --shadow-soft: 8px 8px 20px rgba(0,0,0,0.42),
                   -8px -8px 20px rgba(255,255,255,0.03);

    --shadow-hover: 12px 12px 28px rgba(0,0,0,0.5),
                    -12px -12px 28px rgba(255,255,255,0.04);

    --glass-bg: rgba(30,41,59,0.68);
    --glass-border: rgba(71,85,105,0.72);

    --color-1: #1f2a44;
    --color-2: #1d3a38;
    --color-3: #3c2d1f;
    --color-4: #3f2222;
    --color-5: #1c3444;
    --color-6: #2d2340;

    --text-strong: #f1f5f9;
    --text-soft: #cbd5e1;

    --tool-btn-bg: rgba(15,23,42,0.48);
    --tool-btn-bg-hover: rgba(30,41,59,0.82);
    --divider-color: rgba(148,163,184,0.28);
}

/* ============================================
   HERO — GLASS + NEOMORPHISM
============================================ */

.hero {
    padding: 90px 20px;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-strong);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-soft);
    margin-top: 10px;
}

/* ============================================
   SECCIÓN DESTACADAS — 3 ARRIBA + 3 ABAJO
============================================ */

.tools-section {
    max-width: 1200px;
    margin: 70px auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-strong);
    margin-bottom: 40px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

@media (max-width: 900px) {
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   TOOL CARDS — GLASS + NEOMORPHISM
============================================ */

.tool-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
    transition: 0.3s ease;
    color: var(--text-strong);
}

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

/* Icono */
.tool-icon svg {
    width: 48px;
    height: 48px;
    opacity: 0.8;
    margin-bottom: 16px;
}

/* Título */
.tool-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 10px;
}

/* Descripción */
.tool-description {
    color: var(--text-soft);
    margin-bottom: 22px;
}

/* Botón */
.tool-btn {
    display: inline-block;
    padding: 12px 20px;
    border-radius: 12px;
    background: var(--tool-btn-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    font-weight: 600;
    color: var(--text-strong);
    transition: 0.25s ease;
}

.tool-btn:hover {
    background: var(--tool-btn-bg-hover);
}

/* ============================================
   COLORES SUAVES POR TARJETA (ULTRA PREMIUM)
============================================ */

.tool-card:nth-child(1) { background: var(--color-1); }
.tool-card:nth-child(2) { background: var(--color-2); }
.tool-card:nth-child(3) { background: var(--color-3); }
.tool-card:nth-child(4) { background: var(--color-4); }
.tool-card:nth-child(5) { background: var(--color-5); }
.tool-card:nth-child(6) { background: var(--color-6); }

/* ============================================
   SECCIÓN VERTICAL DE CATEGORÍAS
============================================ */

.all-tools-section {
    max-width: 900px;
    margin: 90px auto;
    padding: 0 20px;
}

.tools-categories-vertical {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* Categoría */
.tool-category-vertical {
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
    transition: 0.3s ease;
}

.tool-category-vertical:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-hover);
}

/* Título */
.category-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 18px;
    color: var(--text-strong);
}

/* Enlaces */
.tool-category-vertical a {
    display: block;
    padding: 12px 0;
    font-size: 1.05rem;
    color: var(--text-soft);
    border-bottom: 1px solid var(--divider-color);
    transition: 0.25s ease;
}

.tool-category-vertical a:last-child {
    border-bottom: none;
}

.tool-category-vertical a:hover {
    padding-left: 8px;
    color: var(--text-strong);
}

/* ============================================
   RESPONSIVE
============================================ */

@media (max-width: 600px) {
    .hero-title { font-size: 2.2rem; }
    .tool-category-vertical { padding: 24px; }
}