:root {
    --background: #17181b;
    --surface: #24262b;
    --surface-light: #30343b;
    --primary: #5ecf68;
    --primary-hover: #499450;
    --danger: #d95d5d;
    --danger-hover: #e67070;
    --text: #f5f5f5;
    --text-secondary: #b7bcc7;
    --shadow: rgba(0, 0, 0, 0.25);
    --border-radius: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--background);
    color: var(--text);
    font-family: Inter, Arial, sans-serif;
    line-height: 1.6;
}

header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10vw;
    background: #1d1f23;
    box-shadow: 0 5px 20px var(--shadow);
    z-index: 100;
}

header .logo {
    font-size: 28px;
    font-weight: bold;
}

header nav {
    display: flex;
    gap: 30px;
}

header nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: .2s;
}

header nav a:hover {
    color: white;
}

section {
    padding: 80px 10vw;
}

section h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

#hero {
    text-align: center;
    padding-top: 20px;
    padding-bottom: 20px;
}

#hero h1 {
    font-size: 64px;
    margin-bottom: 20px;
}

#hero h2 {
    color: var(--text-secondary);
    font-weight: normal;
    margin-bottom: 30px;
}

#hero p {
    max-width: 700px;
    margin: auto;
    color: var(--text-secondary);
}

button {
    padding: 15px 30px;
    margin: 20px 10px 0;
    border: none;
    border-radius: 12px;
    background: var(--primary);
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: .2s;
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

button.remove {
    background: var(--danger);
}

button.remove:hover {
    background: var(--danger-hover);
}

select {
    padding: 5px 10px;
    margin: -4px 0px 0;
    border: none;
    border-radius: 6px;
    background: var(--surface-light);
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    transition: .2s;
}

select:hover {
    background: var(--surface);
}

.status {
    margin-top: 25px;
    min-height: 30px;
    color: var(--text-secondary);
}

.cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.cards article {
    background: var(--surface);
    width: 280px;
    padding: 35px;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 25px var(--shadow);
    transition: .2s;
}

.cards article:hover {
    transform: translateY(-4px);
}

.cards h3 {
    margin-bottom: 15px;
}

.cards p {
    color: var(--text-secondary);
}

details {
    background: var(--surface);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 5px 15px var(--shadow);
}

summary {
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
}

details p {
    margin-top: 15px;
    color: var(--text-secondary);
}

footer {
    margin-top: 80px;
    padding: 40px;
    text-align: left;
    background: #1d1f23;
    color: var(--text-secondary);
}

footer p:first-child {
    font-size: 20px;
    color: white;
    margin-bottom: 10px;
}

@media (max-width: 900px) {
    header {
        flex-direction: column;
        gap: 20px;
    }
    #hero h1 {
        font-size: 48px;
    }
    section {
        padding: 60px 8vw;
    }
    .cards {
        flex-direction: column;
        align-items: center;
    }
    .cards article {
        width: 100%;
    }
}