/* ========================================
   ESTILOS COMUNES - TitulApp
   Usando variables de colors.css
   ======================================== */

/* Reset y estilos base */
* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: var(--background-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Navegación */
nav {
    background: var(--gradient-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left var(--transition-slow);
}

nav:hover::before {
    left: 100%;
}

nav .logo {
    font-weight: 800;
    font-size: 20px;
    color: var(--text-white);
    text-decoration: none;
    transition: all var(--transition-normal);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 32px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    transition: all var(--transition-normal);
}

.logo-text {
    font-weight: 800;
    font-size: 20px;
}

nav .logo:hover {
    transform: scale(1.05);
    text-shadow: 0 4px 8px rgba(0,0,0,0.4);
}

nav .logo:hover .logo-img {
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.4));
    transform: scale(1.1);
}

nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-sm);
    margin: 0;
    padding: 0;
}

nav ul li a {
    color: var(--text-white);
    text-decoration: none;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    position: relative;
    backdrop-filter: blur(10px);
}

nav ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

nav ul li a:hover::before {
    opacity: 1;
}

nav ul li a:hover {
    transform: translateY(-2px);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* Botones comunes */
.btn {
    cursor: pointer;
    user-select: none;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 14px;
    background: var(--gradient-secondary);
    color: var(--text-white);
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.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 var(--transition-normal);
}

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

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn.danger {
    background: var(--gradient-error);
    color: var(--text-white);
}

.btn.danger:hover {
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
}

.cta-button {
    background: var(--gradient-secondary);
    color: var(--text-white);
    padding: var(--spacing-md) var(--spacing-xl);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-size: 18px;
    font-weight: 700;
    margin-top: 20px;
    display: inline-block;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left var(--transition-normal);
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.cta-button:hover::before {
    left: 100%;
}

/* Inputs y forms */
input, select {
    width: 100%;
    background: var(--background-primary);
    color: var(--text-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 12px var(--spacing-md);
    outline: none;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-md);
    box-sizing: border-box;
    font-size: 14px;
    box-shadow: var(--shadow-inner);
}

input:focus, select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(102, 187, 106, 0.1), var(--shadow-sm);
    transform: translateY(-1px);
}

input:hover, select:hover {
    border-color: var(--border-primary);
    box-shadow: var(--shadow-sm);
}

label {
    display: block;
    font-size: 14px;
    color: var(--text-brand);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 12px;
}

/* Cards y contenedores */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--border-light);
    padding: 28px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

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

/* Grids comunes */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: 1fr;
}

@media (min-width: 860px) {
    .grid-2 {
        grid-template-columns: 1.3fr 0.7fr;
    }
}

/* Utilidades */
.text-center {
    text-align: center;
}

.mb-20 {
    margin-bottom: 20px;
}

.mt-20 {
    margin-top: 20px;
}

/* Footer */
footer {
    background-color: var(--color-primary-dark);
    color: var(--text-white);
    text-align: center;
    padding: 20px;
    margin-top: auto;
}

/* Responsive helpers */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }
    
    nav ul {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .btn, .cta-button {
        font-size: 16px;
        padding: 12px 20px;
    }
}

/* Animaciones globales */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Animaciones al cargar */
.card {
    animation: fadeInUp 0.6s ease-out;
}

.card:nth-child(even) {
    animation: slideInLeft 0.6s ease-out;
}

/* Efectos de loading suaves */
body {
    animation: fadeInUp 0.4s ease-out;
}

/* Mejoras de scroll suave */
html {
    scroll-behavior: smooth;
}

/* Focus mejorado para accesibilidad */
*:focus {
    outline: 3px solid rgba(102, 187, 106, 0.4);
    outline-offset: 2px;
}