/* Universal selector: resets default browser margins, padding, and applies border-box sizing to all elements */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

/* Header and navigation section - centered layout */
header {
    margin: 20px auto;
    padding: 30px;
    border: 2px solid #000;
    border-radius: 10px;
    background-color: #fffcfc;
    text-align: center;
    font-size: 24px;
    width: 100%;
    max-width: 1200px;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

@media (max-width: 768px) {
    header {
        padding: 20px;
        font-size: 20px;
        min-height: 80px;
    }
}

/* Headings - centered text styling */
h1 {
    color: #005eff;
    font-size: 50px;
    text-align: center;
    margin: 15px 0;
    padding: 10px;
}

h2 {
    color: #000;
    font-size: 30px;
    text-align: center;
    margin: 15px 0;
    padding: 10px;
}

@media (max-width: 768px) {
    h1, h2 {
        font-size: 20px;
        margin: 10px 0;
        padding: 5px;
    }
}

/* Navigation - horizontal flexbox layout */
nav {
    margin: 0 auto;
    padding: 10px;
    color: #e0bcbc;
    font-weight: bold;
    font-size: 16px;
    text-align: center;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

@media (max-width: 768px) {
    nav {
        font-size: 14px;
        gap: 10px;
        padding: 5px;
    }
}

/* Page layout section - gradient background with full viewport height */
body {
    background: linear-gradient(to bottom, #008cff, #fff);
    margin: 0 auto;
    padding: 10px;
    width: 100%;
    min-height: 100vh;
    font-size: 14px;
    color: #333;
}

/* Paragraph styling - spacing control */
p {
    margin: 0 0 10px 0;
    padding: 5px;
}

/* Sections - centered containers with borders and gradient backgrounds */
section {
    margin: 20px auto;
    padding: 20px;
    border: 2px solid #000;
    border-radius: 10px;
    background: linear-gradient(to bottom, #fff, #f9f9f9);
    width: 90%;
    max-width: 1000px;
    text-align: left;
}

@media (max-width: 768px) {
    section {
        width: 95%;
        padding: 15px;
        margin: 15px auto;
    }
}

/* Footer - centered text with dark background */
footer {
    margin: 20px;
    padding: 10px;
    border: 2px solid #000;
    border-radius: 10px;
    background-color: #d1d1d1;
    text-align: center;
    font-size: 12px;
}

@media (max-width: 768px) {
    footer {
        font-size: 11px;
        margin: 15px;
        padding: 8px;
    }
}

/* Quote section - red italic text with transparency */
.quote {
    margin: 18px auto;
    padding: 15px;
    color: #c00;
    text-align: center;
    font-style: italic;
    border: 1px solid #ccc;
    border-radius: 6px;
    opacity: 0.9;
}

/* Checklist - light blue gradient background */
.checklist {
    margin: 6px auto 18px;
    padding: 14px 18px;
    max-width: 600px;
    border: 1px solid #cfeffd;
    border-radius: 6px;
    background: linear-gradient(to bottom, #eaf9ff, #d0f0ff);
    text-align: center;
    font-size: 14px;
}

@media (max-width: 768px) {
    .checklist {
        max-width: 100%;
        margin: 6px auto 15px;
        padding: 12px 15px;
    }
}

/* Checklist title - dark blue centered heading */
.checklist-title {
    margin: 22px auto 8px;
    font-size: 1.2rem;
    color: #123456;
    text-align: center;
}

/* Centered content wrapper - 80% width container */
.centered {
    margin: 0 auto;
    width: 80%;
    max-width: 1200px;
    padding: 20px;
    text-align: center;
}

@media (max-width: 768px) {
    .centered {
        width: 95%;
        padding: 15px;
    }
}

/* Laurea media section - scrollable container for videos */
.laureamedia {
    margin: 20px auto;
    padding: 20px;
    border: 2px solid #000;
    border-radius: 10px;
    background: linear-gradient(to bottom, #fff, #f5f5f5);
    min-height: 300px;
    max-height: 600px;
    width: 100%;
    max-width: 1000px;
    overflow-y: scroll;
    text-align: center;
}

@media (max-width: 768px) {
    .laureamedia {
        min-height: 250px;
        max-height: 500px;
        width: 95%;
        padding: 15px;
    }

    .laureamedia img {
        width: 100% !important;
        max-width: 100%;
        height: auto !important;
    }
}

/* Video container - stacks videos vertically */
.video {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

@media (max-width: 768px) {
    .video {
        gap: 15px;
    }

    .video iframe {
        width: 100% !important;
        max-width: 100%;
        height: auto;
    }
}

/* Form container - white background with consistent styling */
form {
    margin: 0 auto;
    padding: 15px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    text-align: left;
    max-width: 100%;
    min-width: 500px;
}

@media (max-width: 768px) {
    form {
        min-width: auto;
        max-width: 100%;
    }
}

/* Form section - centered container with gradient background */
.form-section {
    margin: 20px auto;
    padding: 20px;
    border: 2px solid #000;
    border-radius: 10px;
    background: linear-gradient(135deg, #fff, #f0f0f0);
    width: 90%;
    text-align: left;
    max-width: 100%;
    min-width: 500px;
}

@media (max-width: 768px) {
    .form-section {
        min-width: auto;
        max-width: 100%;
    }
}

/* Form elements - inputs, buttons, and controls styling */
input, button, select, textarea {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    width: 100%;
    max-width: 500px;
    min-height: 32px;
}

@media (max-width: 768px) {
    input, button, select, textarea {
        max-width: 100%;
        font-size: 16px;
    }
}

/* Form labels - bold text block display */
label {
    display: block;
    margin: 8px 0 6px;
    font-weight: 700;
    font-size: 14px;
}

/* Text input fields - specific sizing */
input[type="text"],
input[type="email"],
input[type="password"] {
    padding: 6px 10px;
    background-color: #fff;
    max-width: 400px;
    height: 36px;
}

@media (max-width: 768px) {
    input[type="text"],
    input[type="email"],
    input[type="password"] {
        max-width: 100%;
        height: auto;
    }
}

/* Checkboxes and radio buttons - auto sizing */
input[type="checkbox"],
input[type="radio"] {
    width: auto;
    height: auto;
    margin: 0 10px 0 0;
    padding: 0;
    vertical-align: middle;
}

/* Buttons - blue background with hover effects */
button {
    background-color: rgb(1, 167, 243);
    color: white;
    cursor: pointer;
    border: 1px solid #000;
    padding: 8px 14px;
    border-radius: 6px;
    margin: 10px 0;
    width: auto;
    min-width: 100px;
}

@media (max-width: 768px) {
    button {
        width: 100%;
        margin: 8px 0;
    }
}

/* Submit button - darker blue color */
#submit {
    background-color: rgb(0, 100, 200) !important;
    border: 2px solid rgb(0, 80, 160) !important;
}

/* Button hover state - reduced opacity */
button:hover {
    opacity: 0.8;
}

/* Button disabled state - grayed out */
button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: #ccc;
}

/* Input focus state - blue outline with yellow background */
input:focus, textarea:focus, select:focus {
    outline: 2px solid #66aaff;
    outline-offset: 2px;
    background-color: #fffacd !important;
}

/* Main title - uppercase with letter spacing */
#main-title {
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 28px;
    text-align: center;
    margin: 20px 0;
    padding: 15px;
}

/* Slider value display - inline-block with background */
#slider-value {
    margin: 10px 0;
    padding: 5px 10px;
    display: inline-block;
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    border-radius: 4px;
}

/* H1 with title class - large centered heading */
h1.title {
    font-size: 28px;
    text-align: center;
    margin: 15px 0;
    padding: 15px;
}

/* H2 inside article tags - centered with spacing */
article h2 {
    text-align: center;
    margin: 0 0 15px 0;
    padding: 10px;
}

/* List items in main-list - left indented */
.main-list li {
    margin: 0 0 6px 18px;
    padding-left: 5px;
}

/* Link hover state - underline and blue color */
a:hover {
    text-decoration: underline;
    color: #0066cc;
    opacity: 0.8;
}

/* Visited links - purple color */
a:visited {
    color: #9900ff;
}

/* Active links - reduced opacity */
a:active {
    opacity: 0.6;
}

/* Hidden elements - visibility hidden */
.hidden { visibility: hidden; }

/* Visible elements - explicit visibility */
.visible { visibility: visible; }