/* ===============================
   GLOBAL STYLES
=================================*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background-color: #f4f7fb;
    color: #222;
    line-height: 1.6;
}

/* ===============================
   NAVIGATION BAR
=================================*/
header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background: rgba(10, 25, 60, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 8%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.logo {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
}

header nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 25px;
    font-weight: 500;
    transition: 0.3s ease;
}

header nav a:hover {
    color: #ffb400;
}

/* ===============================
   HERO SECTION
=================================*/
.hero {
    height: 100vh;
    background: linear-gradient(
        rgba(5, 20, 50, 0.75),
        rgba(5, 20, 50, 0.85)
    ),
    url("background.jpg") no-repeat center center;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    text-align: center;
}

.overlay {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    padding: 50px 60px;
    border-radius: 15px;
    color: #fff;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.overlay h1 {
    font-size: 48px;
    margin-bottom: 15px;
    font-weight: 700;
}

.overlay p {
    font-size: 20px;
    margin-bottom: 15px;
}

.sub {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 25px;
}

/* ===============================
   BUTTONS
=================================*/
.btn-primary {
    background: linear-gradient(45deg, #ffb400, #ff9900);
    border: none;
    padding: 14px 28px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s ease;
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 180, 0, 0.4);
}

.btn-dark {
    background: #0a193c;
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.3s;
}

.btn-dark:hover {
    background: #142f66;
}

/* ===============================
   CATEGORIES SECTION
=================================*/
.categories {
    padding: 80px 10%;
    text-align: center;
}

.categories h2 {
    margin-bottom: 40px;
    font-size: 32px;
    color: #0a193c;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    transition: 0.3s ease;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.15);
}

.card span {
    display: block;
    margin-top: 8px;
    font-size: 14px;
    color: #666;
}

/* ===============================
   AUTH SECTION
=================================*/
.auth-section {
    display: flex;
    gap: 40px;
    padding: 80px 10%;
    flex-wrap: wrap;
    justify-content: center;
}

.form-card {
    background: #fff;
    padding: 35px;
    border-radius: 15px;
    width: 360px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.form-card h3 {
    margin-bottom: 20px;
    color: #0a193c;
}

.form-card input,
.form-card select {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid #ddd;
    transition: 0.2s;
}

.form-card input:focus,
.form-card select:focus {
    border-color: #ffb400;
    outline: none;
}

/* ===============================
   UPLOAD SECTION
=================================*/
.upload-section {
    padding: 80px 10%;
    text-align: center;
}

.upload-section h3 {
    font-size: 26px;
    margin-bottom: 25px;
}

.upload-box {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.upload-box input {
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #ccc;
}

/* ===============================
   FOOTER
=================================*/
footer {
    background: #0a193c;
    color: #fff;
    text-align: center;
    padding: 25px;
    margin-top: 60px;
}

/* ===============================
   RESPONSIVE DESIGN
=================================*/
@media (max-width: 768px) {

    .overlay h1 {
        font-size: 32px;
    }

    .overlay {
        padding: 30px;
    }

    .auth-section {
        flex-direction: column;
        align-items: center;
    }
}