/* --- Global Styles & Dark Theme --- */
:root {
    --primary-color: #00bfff; /* Deep Sky Blue - good for tech */
    --primary-hover: #009acd;
    --dark-bg: #121212;
    --dark-card: #1e1e1e;
    --dark-header: #1a1a1a;
    --text-light: #f0f0f0;
    --text-muted: #aaa;
    --danger-color: #ff4d4d;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

section {
    padding: 6rem 0;
}

h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; text-align: center; }
h3 { font-size: 1.5rem; color: var(--primary-color); }
p { margin-bottom: 1rem; }

a {
    color: var(--primary-color);
    text-decoration: none;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border: none;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}
.btn-secondary:hover {
    background: var(--primary-color);
    color: #fff;
}

/* --- Header --- */
header {
    background-color: var(--dark-header);
    padding: 1rem 0;
    border-bottom: 1px solid #333;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 40px; /* Adjust as needed */
}

header nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}

header nav li {
    margin-left: 1.5rem;
}

header nav a {
    color: var(--text-light);
    font-weight: 500;
}
header nav a:hover {
    color: var(--primary-color);
}
header nav a.btn {
    color: #fff;
}
header nav a.btn-secondary:hover {
    color: #fff;
}


/* --- Hero Section --- */
.hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1511553677256-465d96f60d16?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wzNzEyMywxMHwxfHNlYXJjaHwxfHxhYnN0cmFjdCUyMGRhcmslMjBuZXR3b3JrJTdD&ixlib=rb-4.0.3&q=80&w=1080') no-repeat center center/cover;
    height: 90vh;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
}
.hero .subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 1rem auto 2rem;
}

/* --- Features Section --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    text-align: left;
}

.feature-item {
    background-color: var(--dark-card);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

/* --- Pricing Section --- */
.pricing .subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pricing-plan {
    background-color: var(--dark-card);
    padding: 2.5rem;
    border-radius: 8px;
    text-align: center;
    border: 2px solid var(--dark-card);
    transition: transform 0.3s ease;
}
.pricing-plan:hover {
    transform: translateY(-5px);
}

.pricing-plan.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.pricing-plan .price {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
}
.pricing-plan .price span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-muted);
}
.pricing-plan ul {
    list-style: none;
    margin: 2rem 0;
}
.pricing-plan ul li {
    margin-bottom: 0.5rem;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    background-color: var(--dark-header);
    color: var(--text-muted);
}

/* --- Login Page --- */
body.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    background-color: var(--dark-card);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-container .logo {
    height: 50px;
    margin-bottom: 1.5rem;
}

.login-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
    text-align: left;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.form-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #555;
    background-color: #333;
    color: var(--text-light);
    border-radius: 4px;
}

.login-container button[type="submit"] {
    width: 100%;
    margin-top: 1rem;
}

.error-message {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin: 1rem 0 0;
    display: none; /* Hidden by default */
}

.signup-link {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}