/* ==========================================================================
   KAMEU New - Base Styles
   Reset, Typography, Layout Utilities
   ========================================================================== */

/* ── Reset ── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--kn-font-body);
    font-size: var(--kn-text-base);
    font-weight: var(--kn-weight-normal);
    line-height: var(--kn-leading-normal);
    color: var(--kn-gray-800);
    background-color: var(--kn-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--kn-primary);
    text-decoration: none;
    transition: color var(--kn-transition-fast);
}

a:hover {
    color: var(--kn-secondary);
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    font-size: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--kn-font-heading);
    font-weight: var(--kn-weight-bold);
    line-height: var(--kn-leading-tight);
    color: var(--kn-gray-800);
}

h1 { font-size: var(--kn-text-4xl); }
h2 { font-size: var(--kn-text-3xl); }
h3 { font-size: var(--kn-text-2xl); }
h4 { font-size: var(--kn-text-xl); }
h5 { font-size: var(--kn-text-lg); }
h6 { font-size: var(--kn-text-base); }

p {
    margin-bottom: var(--kn-space-4);
    line-height: var(--kn-leading-relaxed);
}

strong, b {
    font-weight: var(--kn-weight-semibold);
}

small {
    font-size: var(--kn-text-sm);
}

/* ── Layout ── */
.kn-container {
    width: 100%;
    max-width: var(--kn-container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--kn-container-padding);
    padding-right: var(--kn-container-padding);
}

.kn-container--wide {
    max-width: 1600px;
}

.kn-container--narrow {
    max-width: 1000px;
}

.kn-section {
    padding-top: var(--kn-space-16);
    padding-bottom: var(--kn-space-16);
}

.kn-section--sm {
    padding-top: var(--kn-space-8);
    padding-bottom: var(--kn-space-8);
}

.kn-section--dark {
    background-color: var(--kn-tech-dark);
    color: var(--kn-white);
}

.kn-section__header {
    text-align: center;
    margin-bottom: var(--kn-space-10);
}

.kn-section__title {
    font-size: var(--kn-text-3xl);
    font-weight: var(--kn-weight-bold);
    margin-bottom: var(--kn-space-2);
    position: relative;
    display: inline-block;
}

.kn-section__title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--kn-secondary);
    border-radius: var(--kn-radius-full);
}

.kn-section__subtitle {
    font-size: var(--kn-text-base);
    color: var(--kn-gray-500);
    margin-top: var(--kn-space-4);
}

/* ── Grid System ── */
.kn-grid {
    display: grid;
    gap: var(--kn-grid-gap);
}

.kn-grid--2 { grid-template-columns: repeat(2, 1fr); }
.kn-grid--3 { grid-template-columns: repeat(3, 1fr); }
.kn-grid--4 { grid-template-columns: repeat(4, 1fr); }
.kn-grid--5 { grid-template-columns: repeat(5, 1fr); }
.kn-grid--6 { grid-template-columns: repeat(6, 1fr); }

.kn-grid--products {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--kn-space-6);
}

/* ── Flex Utilities ── */
.kn-flex { display: flex; }
.kn-flex--center { display: flex; align-items: center; justify-content: center; }
.kn-flex--between { display: flex; align-items: center; justify-content: space-between; }
.kn-flex--wrap { flex-wrap: wrap; }
.kn-flex--col { flex-direction: column; }
.kn-gap-2 { gap: var(--kn-space-2); }
.kn-gap-4 { gap: var(--kn-space-4); }
.kn-gap-6 { gap: var(--kn-space-6); }

/* ── Accessibility ── */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--kn-space-3) var(--kn-space-6);
    background: var(--kn-primary);
    color: var(--kn-white);
    border-radius: 0 0 var(--kn-radius-md) var(--kn-radius-md);
    z-index: 9999;
    transition: top var(--kn-transition-fast);
}

.skip-link:focus {
    top: 0;
    color: var(--kn-white);
}

/* ── Text Utilities ── */
.kn-text-center { text-align: center; }
.kn-text-right { text-align: right; }
.kn-text-uppercase { text-transform: uppercase; letter-spacing: 0.05em; }
.kn-text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ── Margin/Padding Helpers ── */
.kn-mb-0 { margin-bottom: 0; }
.kn-mb-4 { margin-bottom: var(--kn-space-4); }
.kn-mb-8 { margin-bottom: var(--kn-space-8); }
.kn-mt-4 { margin-top: var(--kn-space-4); }
.kn-mt-8 { margin-top: var(--kn-space-8); }

/* ── Overlay / Backdrop ── */
.kn-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--kn-z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--kn-transition), visibility var(--kn-transition);
}

.kn-overlay.is-active {
    opacity: 1;
    visibility: visible;
}