/* Explain: Styling for UI components including buttons, cards, and form elements. */
.grid-panel {
    position: relative;
    overflow: hidden;
}

.grid-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.45;
    background-image:
        linear-gradient(rgba(201, 199, 194, 0.28) 1px, transparent 1px),
        linear-gradient(90deg, rgba(201, 199, 194, 0.28) 1px, transparent 1px);
    background-size: 44px 44px;
}

.btn-solid {
    min-height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: var(--radius-oval);
    background: var(--espresso-color);
    color: var(--pearl-color);
    border: 1px solid var(--espresso-color);
    padding-inline: 1.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 300ms ease;
    cursor: pointer;
}

.btn-solid:hover,
.btn-solid:focus-visible {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-outline {
    min-height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: var(--radius-oval);
    background: transparent;
    color: var(--espresso-color);
    border: 1px solid rgba(45, 36, 32, 0.28);
    padding-inline: 1.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 300ms ease;
    cursor: pointer;
}

.btn-outline:hover,
.btn-outline:focus-visible {
    border-color: var(--espresso-color);
    background: var(--surface-color);
    transform: translateY(-2px);
}

.spec-card {
    border: 1px solid rgba(201, 199, 194, 0.7);
    background: rgba(255, 253, 248, 0.82);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(12px);
}

.media-frame {
    overflow: hidden;
}

.media-frame img {
    transition: transform 600ms ease;
}

.media-frame:hover img {
    transform: scale(1.04);
}

.process-step {
    border-top: 1px solid rgba(201, 199, 194, 0.8);
}

.contact-chip {
    border: 1px solid rgba(201, 199, 194, 0.8);
    background: rgba(255, 253, 248, 0.8);
    transition: all 240ms ease;
}

.contact-chip:hover,
.contact-chip:focus-visible {
    border-color: var(--espresso-color);
    transform: translateY(-2px);
}

.form-status {
    min-height: 1.25rem;
}

.toast-cnc {
    position: fixed;
    left: 50%;
    bottom: 1.25rem;
    z-index: 80;
    transform: translateX(-50%) translateY(1rem);
    opacity: 0;
    pointer-events: none;
    transition: all 240ms ease;
}

.toast-cnc.is-visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.faq-item > summary {
    list-style: none;
    cursor: pointer;
}

.faq-item > summary::-webkit-details-marker {
    display: none;
}

.faq-chevron {
    transition: transform 300ms ease;
}

.faq-item[open] .faq-chevron {
    transform: rotate(180deg);
}

/* Quote request form */
.form-step {
    margin: 0;
    padding: 0;
    border: 0;
    min-inline-size: 0;
}

.form-step + .form-step {
    margin-top: 2.25rem;
}

.form-step-heading {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid rgba(201, 199, 194, 0.7);
}

.form-step-number {
    display: flex;
    height: 2.5rem;
    width: 2.5rem;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-oval);
    background: var(--espresso-color);
    color: var(--champagne-color);
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
}

.field-error {
    display: none;
    margin-top: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--error-color);
}

.field-error.is-visible {
    display: block;
}

.input.is-invalid,
.select.is-invalid,
.textarea.is-invalid {
    border-color: var(--error-color);
    box-shadow: 0 0 0 1px var(--error-color);
}

.form-actions {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-top: 2rem;
}

.form-step-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.form-progress {
    flex: 1;
    text-align: center;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.form-submit {
    justify-content: center;
}

.submit-spinner {
    display: none;
    width: 1rem;
    height: 1rem;
    border-radius: var(--radius-oval);
    border: 2px solid rgba(251, 248, 243, 0.4);
    border-top-color: var(--pearl-color);
    animation: submit-spin 700ms linear infinite;
}

.form-submit.is-loading .submit-spinner {
    display: inline-block;
}

.form-submit:disabled {
    opacity: 0.75;
    cursor: progress;
}

.form-submit:disabled:hover {
    transform: none;
}

@keyframes submit-spin {
    to {
        transform: rotate(360deg);
    }
}

.form-status-box {
    display: none;
    align-items: flex-start;
    gap: 0.65rem;
    margin-top: 1.1rem;
    padding: 0.9rem 1.1rem;
    border-radius: 1rem;
    font-size: 0.9rem;
    line-height: 1.55;
}

.form-status-box.is-info,
.form-status-box.is-success,
.form-status-box.is-error {
    display: flex;
}

.form-status-box.is-info {
    background: var(--surface-warm);
    border: 1px solid rgba(201, 199, 194, 0.8);
    color: var(--text-color);
}

.form-status-box.is-success {
    background: rgba(63, 122, 74, 0.12);
    border: 1px solid rgba(63, 122, 74, 0.42);
    color: var(--success-color);
}

.form-status-box.is-error {
    background: rgba(179, 38, 30, 0.08);
    border: 1px solid rgba(179, 38, 30, 0.4);
    color: var(--error-color);
}

.form-status-box i {
    margin-top: 0.15rem;
}

.file-list {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.85rem;
    padding: 0;
    list-style: none;
}

.file-list.is-visible {
    display: flex;
}

.file-list-heading {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.file-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 0.9rem;
    border-radius: 0.9rem;
    border: 1px solid rgba(201, 199, 194, 0.7);
    background: var(--surface-warm);
}

.file-item-icon {
    display: flex;
    height: 2.25rem;
    width: 2.25rem;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-oval);
    background: var(--espresso-color);
    color: var(--champagne-color);
}

.file-item-meta {
    display: flex;
    min-width: 0;
    flex-direction: column;
}

.file-item-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--espresso-color);
}

.file-item-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

@media (max-width: 1023px) {
    .form-step {
        display: none;
    }

    .form-step.is-active {
        display: block;
    }

    .form-step + .form-step {
        margin-top: 0;
    }

    .form-submit {
        display: none;
    }

    .form-submit.is-active {
        display: inline-flex;
    }

    .form-step-nav-item.is-hidden-step {
        display: none;
    }
}

@media (min-width: 1024px) {
    .form-step {
        display: block;
    }

    .form-step-nav {
        display: none;
    }

    .form-submit {
        display: inline-flex;
    }
}

/* Client reviews */
.review-card {
    position: relative;
    overflow: hidden;
    transition: transform 300ms ease, box-shadow 300ms ease;
}

.review-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    width: 5rem;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-soft);
}

.review-stars {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

/* Project preview cards */
.project-card {
    transition: transform 300ms ease, box-shadow 300ms ease;
}

.project-card:hover,
.project-card:focus-within {
    transform: translateY(-4px);
    box-shadow: var(--shadow-soft);
}

.project-card:focus-within {
    outline: 2px solid var(--secondary-color);
    outline-offset: 4px;
}

.project-card a {
    color: inherit;
    text-decoration: none;
}

.project-card a:focus {
    outline: none;
}

.project-detail {
    padding: 3.5rem 1.25rem 1.25rem;
    background: linear-gradient(180deg, rgba(45, 36, 32, 0) 0%, rgba(45, 36, 32, 0.82) 58%, rgba(45, 36, 32, 0.94) 100%);
    opacity: 1;
    transform: none;
    transition: opacity 320ms ease, transform 320ms ease;
}

@media (hover: hover) {
    .project-detail {
        opacity: 0;
        transform: translateY(1rem);
    }

    .project-card:hover .project-detail,
    .project-card:focus-within .project-detail {
        opacity: 1;
        transform: translateY(0);
    }
}