/* ============================================
   LanddonRAG — Landing & Login Styles
   Premium dark theme with blue/cyan SaaS identity
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #06090f;
    --bg-secondary: #0c1220;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --border-card: rgba(255, 255, 255, 0.08);
    --border-card-hover: rgba(255, 255, 255, 0.16);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #06b6d4;
    --accent-hover: #22d3ee;
    --accent-glow: rgba(6, 182, 212, 0.25);
    --accent-2: #3b82f6;
    --accent-2-glow: rgba(59, 130, 246, 0.2);
    --violet: #8b5cf6;
    --violet-glow: rgba(139, 92, 246, 0.15);
    --emerald: #10b981;
    --emerald-glow: rgba(16, 185, 129, 0.15);
    --gradient-hero: linear-gradient(135deg, #0c1a3a 0%, #06090f 40%, #0a0f2e 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--accent-2));
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.06);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --shadow-glow: 0 0 60px rgba(6, 182, 212, 0.08), 0 0 120px rgba(59, 130, 246, 0.05);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ---------- Animated Background ---------- */
.bg-mesh {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.bg-mesh::before {
    content: '';
    position: absolute;
    width: 900px;
    height: 900px;
    top: -250px;
    right: -250px;
    background: radial-gradient(circle, var(--accent-2-glow) 0%, transparent 70%);
    animation: float-mesh 20s ease-in-out infinite;
}

.bg-mesh::after {
    content: '';
    position: absolute;
    width: 700px;
    height: 700px;
    bottom: -150px;
    left: -150px;
    background: radial-gradient(circle, var(--violet-glow) 0%, transparent 70%);
    animation: float-mesh 25s ease-in-out infinite reverse;
}

@keyframes float-mesh {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 40px) scale(0.95); }
    75% { transform: translate(30px, 20px) scale(1.02); }
}

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 30%, transparent 100%);
}

/* ---------- Navigation ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 2rem;
    transition: var(--transition);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav.scrolled {
    background: rgba(6, 9, 15, 0.88);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-accent);
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
}

.nav-logo .logo-text-brand {
    color: var(--accent);
}

.nav-logo .logo-text-sub {
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-card-hover);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--text-secondary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-card-hover);
}

.btn-outline:hover {
    background: var(--bg-card-hover);
    border-color: var(--text-secondary);
}

.btn-large {
    padding: 14px 36px;
    font-size: 1rem;
    border-radius: var(--radius);
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 2rem 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease-out;
}

.hero-badge .badge-dot {
    width: 6px;
    height: 6px;
    background: var(--emerald);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 50%, var(--violet) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 4s linear infinite;
}

@keyframes shimmer {
    0% { background-position: 200% center; }
    100% { background-position: -200% center; }
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

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

/* ---------- Stats Bar ---------- */
.stats-bar {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: -40px auto 0;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border-card);
    border-radius: var(--radius);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat-item {
    background: var(--bg-secondary);
    padding: 1.5rem 2rem;
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ---------- Features Section ---------- */
.features {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 2rem 120px;
}

.features-header {
    text-align: center;
    margin-bottom: 4rem;
}

.features-header h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.features-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 500px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 50%, rgba(6, 182, 212, 0.03) 100%);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-card-hover);
    transform: translateY(-4px);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-card);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ---------- Pricing Section ---------- */
.pricing {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem 120px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 4rem;
}

.pricing-header h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.pricing-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 500px;
    margin: 0 auto;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    align-items: start;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    transition: var(--transition);
    position: relative;
}

.pricing-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 40px var(--accent-glow);
}

.pricing-card.featured::before {
    content: 'Más popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 100px;
    white-space: nowrap;
}

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

.pricing-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.pricing-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 2rem;
}

.pricing-price .amount {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.pricing-price .period {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.pricing-features li .check {
    color: var(--emerald);
    font-weight: bold;
    flex-shrink: 0;
}

.pricing-features li.disabled {
    color: var(--text-muted);
    text-decoration: line-through;
}

.pricing-features li.disabled .check {
    color: var(--text-muted);
}

/* ---------- CTA Section ---------- */
.cta-section {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 80px 2rem 120px;
}

.cta-section h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 500px;
    margin: 0 auto 2rem;
}

/* ---------- Footer ---------- */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-card);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.footer a {
    color: var(--text-secondary);
    transition: var(--transition);
}

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

/* ---------- Login / Register Page ---------- */
.login-wrapper {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(12, 18, 32, 0.7);
    backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-glow);
    animation: fadeInUp 0.5s ease-out;
}

.login-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.login-logo .logo-icon-large {
    width: 56px;
    height: 56px;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    color: #fff;
}

.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.login-logo h1 .logo-text-brand {
    color: var(--accent);
}

.login-logo h1 .logo-text-sub {
    color: var(--text-secondary);
    font-weight: 400;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ---------- Form ---------- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xs);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}

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

.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-error {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: #ef4444;
    display: none;
}

.form-error.visible {
    display: block;
}

.form-success {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--emerald);
    display: none;
}

.form-success.visible {
    display: block;
}

.form-actions {
    margin-top: 1.75rem;
}

.form-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-footer a {
    color: var(--accent);
    font-weight: 500;
    transition: var(--transition);
}

.form-footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Spinner */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: none;
}

.btn.loading .spinner {
    display: block;
}

.btn.loading .btn-text {
    opacity: 0.7;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .nav { padding: 0 1rem; }
    .nav-inner { height: 60px; }
    .nav-logo { font-size: 1.1rem; }
    .nav-logo .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
    .hero { padding: 100px 1.5rem 60px; }
    .hero-cta { flex-direction: column; align-items: center; }
    .features { padding: 60px 1.5rem 80px; }
    .pricing { padding: 0 1.5rem 80px; }
    .stats-bar { grid-template-columns: 1fr; margin-top: 2rem; }
    .login-card { padding: 2rem 1.5rem; }
    .pricing-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 2rem; }
    .hero-subtitle { font-size: 0.95rem; }
    .features-grid { grid-template-columns: 1fr; }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-card-hover); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }