*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
    margin: 0;
    color: var(--color-text);
    background: var(--color-background);
    font-family: Inter, 'Segoe UI', Arial, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

body.menu-open {
    overflow: hidden;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    color: inherit;
}

h1,
h2,
h3,
p,
blockquote {
    margin-top: 0;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

:focus-visible {
    outline: 3px solid rgb(229 27 35 / 30%);
    outline-offset: 3px;
}

main:focus {
    outline: none;
}

.container {
    width: min(calc(100% - 2rem), var(--container-width));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    z-index: 1000;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.7rem 1rem;
    color: #fff;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 800;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-150%);
    transition:
        opacity var(--transition),
        transform var(--transition);
}

.skip-link:focus-visible {
    outline: 3px solid #111;
    outline-offset: 2px;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.svg-sprite {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

.icon {
    display: inline-block;
    width: 1.25em;
    height: 1.25em;
    flex: 0 0 auto;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: -0.2em;
}

.icon-fill {
    fill: currentColor;
    stroke: none;
}

/* ==========================================================================
   Micro-interactions & Tactile Feedback
   ========================================================================== */

/* Tactile press feedback on interactive elements */
button:active,
.button:active,
a.button:active,
.pwa-badge-btn:active,
.history-filter-trigger:active,
.history-toggle-trigger:active,
.theme-toggle-btn:active,
.theme-segment-btn:active,
.menu-toggle:active,
.back-to-top:active,
.whatsapp-fab:active {
    transform: scale(0.965);
    transition: transform 0.08s ease;
}

/* Silky smooth theme switching */
body,
.header,
.card,
.info-card,
.service-card,
.why-card,
.panel,
.testimonial-card,
.history-accordion-card,
.history-card,
.pwa-sheet-card,
.footer,
.footer-pwa-bar,
.footer-pwa-container,
.nav-links,
.theme-dropdown-menu,
.history-filter-menu,
.history-search-input,
input,
textarea,
select {
    transition: background-color 0.22s ease, border-color 0.22s ease, color 0.22s ease, box-shadow 0.22s ease;
}