/* Variables y tema */
:root {
    --bg: #0b1120;
    --bg-gradient: radial-gradient(circle at 30% 20%, rgba(59,130,246,0.25), transparent 40%),
                   radial-gradient(circle at 80% 80%, rgba(37,99,235,0.2), transparent 40%);
    --card: rgba(30,41,59,0.85);
    --text: #ffffff;
    --primary: #3b82f6;
    --secondary: #94a3b8;
    --hover-glow: rgba(59,130,246,0.4);
}

body.light {
    --bg: #f8fafc;
    --bg-gradient: none;
    --card: #ffffff;
    --text: #0f172a;
    --primary: #2563eb;
    --secondary: #64748b;
    --hover-glow: rgba(37,99,235,0.25);
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background: var(--bg);
    background-image: var(--bg-gradient);
    color: var(--text);
    transition: 0.4s ease;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 10%;
    position: sticky;
    top: 0;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: bold;
    font-size: 1.3rem;
    gap: 10px;
}

.logo-mark {
    width: 16px;
    height: 16px;
    background: var(--primary);
    transform: rotate(45deg);
    box-shadow: 0 0 15px var(--primary);
}

/* Hero */
.hero {
    text-align: center;
    padding: 130px 20px;
    max-width: 900px;
    margin: auto;
    position: relative;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -50px;
    left: -50px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--hover-glow), transparent 60%);
    filter: blur(100px);
    animation: glowMove 6s infinite alternate ease-in-out;
    z-index: 0;
}

@keyframes glowMove {
    0% { transform: translate(0,0) scale(1); }
    50% { transform: translate(30px, 20px) scale(1.1); }
    100% { transform: translate(-20px, -30px) scale(1); }
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 30px;
    line-height: 1.2;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease forwards;
    opacity: 0;
}

.hero p {
    font-size: 1.15rem;
    color: var(--secondary);
    margin-bottom: 50px;
    line-height: 1.8;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1.2s ease forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 50px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1.4s ease forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
    from { opacity: 0; transform: translateY(40px); }
}

/* Botones */
.btn {
    padding: 15px 40px;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 600;
    transition: 0.35s ease, transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    display: inline-block;
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

.btn.primary {
    background: linear-gradient(135deg, var(--primary), #1d4ed8);
    color: #fff;
}

.btn.primary:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 18px 45px var(--hover-glow);
}

.btn.secondary {
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn.secondary:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-6px) scale(1.03);
}

/* Plan botones */
.plan-btn {
    background: linear-gradient(135deg,#2563eb,#3b82f6);
    color: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.plan-btn:hover {
    transform: translateY(-6px) scale(1.05);
    box-shadow: 0 12px 35px var(--hover-glow);
}

/* Pricing */
.pricing {
    padding: 120px 10%;
    text-align: center;
}

.pricing h2 {
    font-size: 2.6rem;
    margin-bottom: 60px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
    gap: 50px;
}

/* Cards */
.card {
    background: var(--card);
    backdrop-filter: blur(18px);
    padding: 50px 40px;
    border-radius: 20px;
    transition: 0.4s ease, transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 10px 30px rgba(0,0,0,0.35);
    opacity: 0;
    transform: translateY(40px);
}

.card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 25px 60px var(--hover-glow);
}

.featured {
    border: 2px solid var(--primary);
    box-shadow: 0 0 50px var(--hover-glow);
}

/* Download */
.download {
    text-align: center;
    padding: 120px 20px;
}

.download p {
    margin: 25px 0 50px;
    color: var(--secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background: rgba(0,0,0,0.7);
}

.modal-content {
    background: var(--card);
    margin: 10% auto;
    padding: 30px;
    border-radius: 16px;
    width: 90%;
    max-width: 450px;
    position: relative;
    color: var(--text);
}

.modal-content input[type="email"], .modal-content textarea {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--secondary);
    margin-bottom: 15px;
    background: rgba(255,255,255,0.05);
    color: var(--text);
}

.modal-content button {
    width: 100%;
}

/* Close */
.close {
    position: absolute;
    top: 12px;
    right: 20px;
    font-size: 28px;
    cursor: pointer;
    color: var(--text);
}

/* Switch */
.switch {
    display: flex;
    align-items: center;
    gap: 12px;
}

.switch input { display: none; }

.slider {
    position: relative;
    width: 64px;
    height: 34px;
    background-color: #334155;
    border-radius: 50px;
    transition: 0.4s;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
}

.slider:before {
    content:"";
    position:absolute;
    height:28px;
    width:28px;
    left:3px;
    top:3px;
    background:white;
    border-radius:50%;
    transition:0.4s;
    box-shadow:0 2px 8px rgba(0,0,0,0.3);
}

input:checked + .slider { background: var(--primary); }
input:checked + .slider:before { transform: translateX(30px); }

.switch-label {
    font-size: 0.95rem;
    color: var(--text);
    font-weight:500;
}