:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #8b5cf6;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem 0;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-text {
    font-weight: 700;
    font-size: 1.25rem;
    background: linear-gradient(to right, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-link {
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #fff;
}

.nav-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.nav-login {
    color: #fff;
}

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

.nav-signup {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.nav-signup:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.23);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 8rem 2rem 4rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* Background Gradients */
.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: var(--primary);
    filter: blur(150px);
    opacity: 0.2;
    z-index: -1;
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--secondary);
    filter: blur(150px);
    opacity: 0.15;
    z-index: -1;
    border-radius: 50%;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.highlight {
    background: linear-gradient(135deg, #a5b4fc 0%, #c4b5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 480px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: inline-flex;
    justify-content: center;
    align-items: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.5), 0 10px 10px -5px rgba(99, 102, 241, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.w-100 {
    width: 100%;
}

/* Glass Mockup */
.hero-visual {
    position: relative;
    perspective: 1000px;
}

.glass-panel {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
    transform: rotateY(-15deg) rotateX(10deg);
    transition: transform 0.5s ease;
    animation: float 6s ease-in-out infinite;
}

.glass-panel:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

@keyframes float {
    0% { transform: rotateY(-15deg) rotateX(10deg) translateY(0px); }
    50% { transform: rotateY(-15deg) rotateX(10deg) translateY(-20px); }
    100% { transform: rotateY(-15deg) rotateX(10deg) translateY(0px); }
}

.mock-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.dots {
    display: flex;
    gap: 6px;
}

.dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.dots span:nth-child(1) { background: #ef4444; }
.dots span:nth-child(2) { background: #eab308; }
.dots span:nth-child(3) { background: #22c55e; }

.mock-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mock-row {
    height: 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    width: 100%;
}

.title-row {
    height: 24px;
    width: 40%;
    background: rgba(255, 255, 255, 0.1);
    margin-bottom: 1rem;
}

.w-75 { width: 75%; }
.w-50 { width: 50%; }

.mock-total {
    margin-top: 1rem;
    height: 32px;
    width: 30%;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(99,102,241,0.5) 0%, rgba(139,92,246,0.5) 100%);
    align-self: flex-end;
}

/* Features */
.features {
    padding: 6rem 2rem;
    background: #0b1120;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    font-weight: 700;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.2);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Signup Section */
.signup-section {
    padding: 6rem 2rem;
    position: relative;
}

.signup-container {
    max-width: 600px;
    margin: 0 auto;
}

.signup-box {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
}

.signup-box h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.signup-box p {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 2.5rem;
}

.signup-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #e2e8f0;
}

.form-group input, .form-group textarea {
    padding: 0.875rem 1rem;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    color: #fff;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        margin: 0 auto 2.5rem;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none; /* simple mobile nav hide for now */
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-cta {
        flex-direction: column;
    }
    .signup-box {
        padding: 2rem;
    }
}