@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@300;400;700&display=swap');

:root {
    --primary-blue: #003DA5;
    --dark-blue: #001e66;
    --light-blue: #00AEEF;
    --danger-red: #ED1C24;
    --danger-dark: #a00f13;
    --max-width: 1200px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Oswald', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #061d3d 0%, #00193a 100%);
    background-attachment: fixed;
    color: white;
    text-transform: uppercase;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: repeating-linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.015) 0px,
        rgba(255, 255, 255, 0.015) 1px,
        transparent 1px,
        transparent 20px
    );
    z-index: 0;
    pointer-events: none;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to right, var(--primary-blue), var(--dark-blue));
    color: white;
    padding: 1rem;
    text-align: center;
    font-size: clamp(1.5rem, 2vw, 2rem);
    font-weight: bold;
    letter-spacing: 2px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.7);
    z-index: 1000;
}

header h1 {
    color: white;
    text-shadow: 2px 2px 0 var(--primary-blue), -2px -2px 0 var(--primary-blue);
    margin: 0;
}

header .btn-back {
    position: absolute;
    left: 5%;
    top: 50%;
    transform: translateY(-50%);
    background: var(--danger-red);
    padding: 0.6em 1.2em;
    border-radius: 50px;
    font-size: clamp(0.9rem, 1vw, 1rem);
    font-weight: bold;
    text-decoration: none;
    color: white;
    transition: 0.3s;
    box-shadow: inset 0 0 5px var(--danger-dark);
}

header .btn-back:hover {
    background: var(--danger-dark);
}

main {
    margin-top: 140px;
    padding: 2rem 1rem;
    text-align: center;
    z-index: 1;
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}

table {
    width: 100%;
    margin-top: 2rem;
    border-collapse: collapse;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    border: 1px solid white;
    box-shadow: 0 0 20px rgba(0, 174, 239, 0.2);
    overflow: hidden;
}

th, td {
    padding: 1rem;
    border: 1px solid white;
    text-align: center;
    font-size: 1em;
}

th {
    background: linear-gradient(to bottom, var(--light-blue), #007FAD);
    text-shadow: 1px 1px var(--primary-blue);
}

tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.05);
}

tr:hover {
    outline: 2px solid var(--light-blue);
    background: rgba(0, 174, 239, 0.1);
}

.btn {
    padding: 10px 20px;
    font-size: 0.9em;
    font-weight: bold;
    border-radius: 50px;
    text-transform: uppercase;
    color: white;
    border: none;
    cursor: pointer;
    transition: 0.3s;
    letter-spacing: 1px;
}

.btn-edit {
    background: linear-gradient(to bottom, var(--light-blue), #007FAD);
    box-shadow: inset 0 0 5px #007FAD;
}

.btn-delete {
    background: linear-gradient(to bottom, var(--danger-red), var(--danger-dark));
    box-shadow: inset 0 0 5px var(--danger-dark);
}

.btn:hover {
    opacity: 0.85;
}

.logo-header {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
}

.logo-img {
    max-height: clamp(40px, 10vw, 100px);
    width: auto;
}

/* RESPONSIVE ADJUSTMENTS */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    .btn-back {
        font-size: 0.8rem;
        padding: 0.5em 1em;
    }

    th, td {
        padding: 0.6rem;
        font-size: 0.85em;
    }

    .logo-img {
        max-height: 80px;
    }
}