:root {
    --primary: #6c5ce7;
    --primary-dark: #5a4bd1;
    --primary-light: #a29bfe;
    --primary-soft: rgba(108, 92, 231, 0.12);
    --secondary: #2d3436;
    --dark: #0a0a1a;
    --light: #f8f9ff;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    --shadow-sm: 0 4px 20px rgba(108, 92, 231, 0.08);
    --shadow-md: 0 12px 40px rgba(108, 92, 231, 0.15);
    --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.25);
    --shadow-hero: 0 30px 80px rgba(108, 92, 231, 0.20);
    --radius: 20px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--white);
    color: var(--secondary);
    overflow-x: hidden;
    line-height: 1.7;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

.btn-primary {
    background: var(--gradient);
    border: none;
    color: var(--white);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(108, 92, 231, 0.35);
    color: var(--white);
}

.btn-outline-secondary {
    border: 2px solid var(--gray-light);
    color: var(--secondary);
    font-weight: 600;
    transition: var(--transition);
}

.btn-outline-secondary:hover {
    background: var(--secondary);
    color: var(--white);
    border-color: var(--secondary);
    transform: translateY(-3px);
}

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
    transition: var(--transition);
}

.btn-outline-primary:hover {
    background: var(--gradient);
    color: var(--white);
    border-color: transparent;
    transform: translateY(-2px);
}

.shadow-primary {
    box-shadow: 0 12px 40px rgba(108, 92, 231, 0.30) !important;
}

.badge {
    font-weight: 600;
    letter-spacing: 0.02em;
}

.bg-primary-soft {
    background: var(--primary-soft);
    color: var(--primary);
}

.bg-soft-info {
    background: rgba(13, 202, 240, 0.12);
    color: #0dcaf0;
}

.bg-soft-success {
    background: rgba(25, 135, 84, 0.12);
    color: #198754;
}

.bg-soft-warning {
    background: rgba(255, 193, 7, 0.12);
    color: #ffc107;
}

.bg-soft-primary {
    background: var(--primary-soft);
    color: var(--primary);
}

.glass-nav {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.04);
    transition: var(--transition);
    padding: 12px 0;
}

.glass-nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.06);
    padding: 8px 0;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--secondary);
}

.navbar-brand span {
    font-weight: 400;
}

.nav-link {
    font-weight: 600;
    color: var(--secondary) !important;
    padding: 8px 18px !important;
    border-radius: 50px;
    transition: var(--transition);
    font-size: 0.9rem;
}

.nav-link:hover,
.nav-link.active {
    background: var(--primary-soft);
    color: var(--primary) !important;
}

.navbar-toggler {
    padding: 8px 12px;
    border-radius: 12px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.hero-section {
    min-height: 100vh;
    padding: 140px 0 80px;
    background: radial-gradient(ellipse at 20% 50%, rgba(108, 92, 231, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(162, 155, 254, 0.04) 0%, transparent 50%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.shadow-hero {
    box-shadow: var(--shadow-hero);
    transition: var(--transition);
}

.shadow-hero:hover {
    transform: scale(1.01) translateY(-5px);
}

.section-padding {
    padding: 100px 0;
}

@media (max-width: 768px) {
    .section-padding {
        padding: 60px 0;
    }
}

.card-premium {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.card-premium:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-md);
}

.card-premium .card-img-top {
    height: 220px;
    object-fit: cover;
}

.card-premium .card-body {
    padding: 28px 24px 32px;
}

.card-premium .card-title {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.card-premium .card-text {
    font-size: 0.95rem;
    margin-bottom: 18px;
}

.icon-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.card-premium:hover .icon-circle {
    background: var(--gradient);
}

.card-premium:hover .icon-circle i {
    color: var(--white) !important;
}

.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-up:nth-child(2) {
    transition-delay: 0.15s;
}

.fade-up:nth-child(3) {
    transition-delay: 0.3s;
}

.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    border-radius: 50% !important;
    background: var(--gradient);
    color: var(--white);
    border: none;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.9);
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.back-to-top i {
    font-size: 1.3rem;
}

@media (max-width: 992px) {
    .hero-section {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .display-3 {
        font-size: 2.8rem !important;
    }
}

@media (max-width: 768px) {
    .display-3 {
        font-size: 2.2rem !important;
    }

    .hero-section .btn-lg {
        padding: 14px 28px !important;
        font-size: 1rem;
    }

    .card-premium .card-img-top {
        height: 180px;
    }

    .back-to-top {
        bottom: 24px;
        right: 24px;
        width: 44px;
        height: 44px;
    }

    .back-to-top i {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    .display-3 {
        font-size: 1.8rem !important;
    }

    .section-padding {
        padding: 40px 0;
    }

    .hero-section {
        padding: 100px 0 40px;
    }

    .navbar-brand {
        font-size: 1.2rem;
    }
}

img {
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
}

.list-unstyled li {
    font-size: 1rem;
}

.bg-dark {
    background: var(--dark) !important;
}

.bg-dark .text-muted {
    color: rgba(255, 255, 255, 0.6) !important;
}

footer a {
    transition: var(--transition);
}

footer a:hover {
    color: var(--white) !important;
}