*,
*::before,
*::after {
    box-sizing: border-box;
}
body {
    margin: 0;
    scroll-behavior: smooth;
    background-color: var(--color-background);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
}
ul,
ol {
    list-style: none;
    padding: 0;
    margin: 0;
}
a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.3s ease, opacity 0.3s ease;
}
a:hover,
a:focus {
    color: var(--color-primary);
    text-decoration: underline;
}
img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}
input,
button,
textarea,
select {
    font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}
h1 {
    font-size: 2.5rem;
}
h2 {
    font-size: 2rem;
}
h3 {
    font-size: 1.5rem;
}
h4 {
    font-size: 1.25rem;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

.button {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    border-radius: 0.3rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: background-color 0.3s ease, transform 0.1s ease;
}
.button-primary {
    background-color: var(--color-secondary);
    color: white;
}

.button-primary:hover {
    background-color: var(--color-primary);
    text-decoration: none;
    color: white;
}

.button-secondary {
    background-color: var(--color-primary);
    color: white;
}

.button-secondary:hover {
    background-color: white;
    text-decoration: none;
    color: var(--color-primary);
}
.button-to-white:hover {
    background-color: white;
    color: var(--color-primary);
}
code,
pre {
    font-family: monospace;
    background-color: #e2e8f0;
    border-radius: 4px;
    padding: 2px 5px;
    color: var(--color-accent);
}
pre {
    padding: var(--space-sm);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    display: block;
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}
.section-heading {
    text-align: center;
    color: var(--color-primary);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-xl);
}
.topic-card {
    background-color: white;
    padding: var(--space-lg);
    border-radius: 0.5rem;
    border-left: 5px solid var(--color-secondary);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}
.card-title {
    color: var(--color-primary);
    margin-top: 0;
}

.card-content {
    color: var(--color-text-main);
    line-height: 1.5;
}

.card-link {
    color: var(--color-secondary);
    font-weight: 600;
    display: inline-block;
    margin-top: var(--space-sm);
}

.card-link:hover {
    text-decoration: underline;
    color: var(--color-accent);
}
.page-hero-section {
    background-color: var(--color-primary);
    color: var(--color-text-secondary);
    padding: var(--space-xl) 0;
    text-align: center;
}
.page-title {
    color: white;
    font-size: 3rem;
    margin-top: 0;
}

.page-subtitle {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    color: rgba(255, 255, 255, 0.8);
}
.content-intro-section {
    padding: var(--space-xl) 0;
    background-color: white;
}
.content-intro-section .sub-heading {
    text-align: center;
}
.standard-list {
    list-style: disc;
    padding-left: 20px;
    font-size: 1.05rem;
    max-width: 800px;
    margin: var(--space-md) auto;
}

.topic-navigation-section {
    padding: var(--space-xl) 0;
    background-color: var(--color-background);
}
.frontend-nav-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    justify-items: center;
}
.next-step-section {
    padding: 0 0 var(--space-md) 0;
}
.topic-card.alt-card {
    border-left: 5px solid var(--color-secondary);
}
.sub-heading {
    text-align: center;
}
.text-center {
    text-align: center;
}

.tool-gallery-section {
    padding: var(--space-xl) 0;
}

.tool-detail-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-lg);
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: var(--space-xl);
}

.detail-icon img {
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-md);
}

.detail-info {
    max-width: 600px;
}

.detail-title {
    margin-top: 0;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.detail-description {
    font-size: 1.1rem;
    color: var(--color-text-main);
    margin-bottom: var(--space-lg);
}

.section-heading {
    margin-top: var(--space-xl);
    text-align: center;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    padding: var(--space-md);
    background-color: var(--color-background);
    border-radius: 0.5rem;
}

.tool-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-md);
    background-color: white;
    border-radius: 0.4rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.tool-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.tool-item.active {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px var(--color-secondary), 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tool-item img {
    width: 50px;
    height: 50px;
    margin-bottom: var(--space-xs);
}

.tool-item p {
    margin: 0;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-primary);
}
.resources-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding: var(--space-md) 0;
}

.resource-card {
    display: flex;
    flex-direction: column;
    background-color: white;
    padding: var(--space-lg);
    border-radius: 0.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    justify-content: space-between;
}

.resource-card .card-title {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.resource-button {
    font-weight: 700;
    display: inline-block;
    border: 2px solid;
    background: none;
    color: var(--color-primary);
    padding: var(--space-xs) var(--space-sm);
    transition: all 0.3s ease;
}

.resource-button:hover {
    color: white;
    box-shadow: none;
    text-decoration: none;
}
.resource-padding {
    padding: var(--space-md) 0;
}

.doc-color {
    color: #8c1935;
}
.learn-color {
    color: #004d40;
}
.ref-color {
    color: #537592;
}
.community-color {
    color: #f48024;
}

.doc-button {
    border-color: #8c1935;
}
.learn-button {
    border-color: #004d40;
}
.ref-button {
    border-color: #537592;
}
.community-button {
    border-color: #f48024;
}

.doc-button:hover {
    background-color: #8c1935;
}
.learn-button:hover {
    background-color: #004d40;
}
.ref-button:hover {
    background-color: #537592;
}
.community-button:hover {
    background-color: #f48024;
}
.contact-section {
    padding: var(--space-xl) 0;
    display: flex;
    justify-content: center;
}

.contact-form {
    max-width: 700px;
    width: 100%;
    margin: 0 auto;
    padding: var(--space-lg);
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.form-group {
    width: calc(100vw - 8rem);
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}

.form-group input[type='text'],
.form-group input[type='email'],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-secondary);
    outline: none;
}

.error-message {
    color: #dc2626;
    font-size: 0.9rem;
    margin-top: 5px;
    height: 1.2rem;
}

.success-message {
    color: var(--color-accent);
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: var(--space-md);
    padding: var(--space-sm);
    background-color: #ecfdf5;
    border: 1px solid var(--color-accent);
    border-radius: 4px;
    display: none;
}
.contact-links {
    text-align: center;
}
.input-error {
    border-color: #dc2626 !important;
}

.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    background-color: var(--color-primary);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease-out;
}

.loader-content {
    text-align: center;
    color: white;
}

.loader-logo-container img {
    width: 150px;
    height: auto;
    margin: auto;
    margin-bottom: var(--space-md);
}

.loader-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.error-section {
    background: linear-gradient(
        -14deg,
        var(--color-text-main),
        var(--color-primary)
    );
    padding: var(--space-xl) 0;
}

.error-info-section {
    background-color: var(--color-background);
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
    text-align: center;
}

.error-illustration {
    max-width: 450px;
    margin: 0 auto;
}

.error-text-block {
    max-width: 600px;
}

.error-text-block .section-heading {
    margin-top: 0;
}

.error-text-block p {
    font-size: 1.1rem;
}

.error-text-block .cta-button {
    margin-top: var(--space-lg);
}
.error-list {
    list-style: none;
    padding-left: 20px;
    font-size: 1.05rem;
    max-width: 800px;
}
@media (min-width: 768px) {
    h1 {
        font-size: 3.5rem;
    }
    h2 {
        font-size: 2.5rem;
    }
    h3 {
        font-size: 1.75rem;
    }
    .container {
        padding: 0 var(--space-md);
    }
    .frontend-nav-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));

        gap: var(--space-md);
    }
    .tool-detail-view {
        flex-direction: row;
        text-align: left;
        gap: var(--space-xl);
    }
    .detail-info {
        max-width: 100%;
    }
    .detail-icon {
        flex-shrink: 0;
    }
    .tool-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    .resources-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-form {
        max-width: 700px;
    }
    .contact-form .form-group {
        width: 550px;
    }
}
@media (min-width: 992px) {
    .error-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .error-illustration,
    .error-text-block {
        flex-basis: 48%;
    }
    .error-list {
        list-style: disc;
    }
}
@media (min-width: 1024px) {
    .resources-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .contact-form {
        max-width: 800px;
    }
    .contact-form .form-group {
        width: 600px;
    }
}
@keyframes blink {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.2;
    }
}