:root {
    --bg-dark: #030d11;
    --surface: #0b1419;
    --accent-orange: #ff6b00;
    --accent-orange-hover: #e66203;
    --text-main: #ffffff;
    --text-dim: #b6b6b6;
    --border: #1a252b;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    margin: 0;
}

header {
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-dark);
    z-index: 1000;
}

.logo { font-size: 1.5rem; font-weight: 800; }
.logo span { color: var(--accent-orange); }

nav a { color: var(--text-dim); text-decoration: none; margin-left: 30px; font-size: 0.9rem; }

.hero {
    height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at center, #0b1c24 0%, var(--bg-dark) 70%);
}

.upload-btn {
    background-color: var(--accent-orange);
    color: white;
    padding: 18px 40px;
    border-radius: 4px;
    font-weight: 700;
    border: none;
    cursor: pointer;
}

.contact-section { padding: 100px 5%; background-color: var(--surface); display: flex; justify-content: center; }
.contact-form { width: 100%; max-width: 600px; background: var(--bg-dark); padding: 40px; border: 1px solid var(--border); }
.submit-btn { width: 100%; padding: 15px; background: transparent; border: 1px solid var(--accent-orange); color: var(--accent-orange); cursor: pointer; }