/* ============================================
   Componentes - Header, Botones, Cards, Footer
   ============================================ */

/* ========== HEADER ========== */
header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px) saturate(180%);
    color: var(--text);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid rgba(102, 126, 234, 0.08);
    transition: var(--transition);
}

[data-theme="dark"] header {
    background: rgba(30, 41, 59, 0.98);
    border-bottom: 1px solid rgba(102, 126, 234, 0.15);
}

header.scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-md);
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: var(--font-bold);
    text-decoration: none;
    color: var(--text);
    transition: var(--transition);
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-img {
    display: block;
    border-radius: 10px;
    transition: var(--transition);
}

.logo:hover .logo-img {
    transform: rotate(-5deg) scale(1.05);
}

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

.theme-toggle {
    background: var(--bg-card);
    border: 2px solid rgba(102, 126, 234, 0.15);
    border-radius: 50px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
}

.theme-toggle:hover {
    transform: scale(1.05);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.theme-toggle:active {
    transform: scale(0.98);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

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

/* ========== HERO ========== */
.hero {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
    color: white;
    padding: 160px 2rem 120px;
    text-align: center;
    margin-top: 70px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        url('data:image/svg+xml,<svg width="60" height="60" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="60" height="60" patternUnits="userSpaceOnUse"><path d="M 60 0 L 0 0 0 60" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></pattern></defs><rect width="60" height="60" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 100px;
    background: var(--bg-light);
    clip-path: polygon(0 50%, 100% 0, 100% 100%, 0 100%);
}

.hero > * {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: var(--font-extrabold);
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: 2.5rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.15s backwards;
    font-weight: var(--font-normal);
    line-height: 1.6;
}

/* ========== BOTONES ========== */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s backwards;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: var(--font-semibold);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::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;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn > * {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: white;
    color: var(--primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
}

/* ========== FEATURE CARDS ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(102, 126, 234, 0.08);
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .feature-card {
    border: 1px solid rgba(102, 126, 234, 0.15);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(10deg);
}

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    color: var(--text);
    font-weight: var(--font-bold);
    line-height: 1.3;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1rem;
}

/* ========== FOOTER ========== */
footer {
    background: var(--gradient-primary);
    color: white;
    padding: 4rem 2rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="60" height="60" patternUnits="userSpaceOnUse"><path d="M 60 0 L 0 0 0 60" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></pattern></defs><rect width="60" height="60" fill="url(%23grid)"/></svg>');
    opacity: 0.4;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
    font-weight: var(--font-medium);
    position: relative;
    font-size: 0.95rem;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s ease;
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-links a:hover {
    transform: translateY(-2px);
}