/* ==========================================================================
   KPA public site - shared shell
   --------------------------------------------------------------------------
   Everything used by more than one public page: reset, navbar, language
   switcher, section headers, hero banner, buttons, cards, footer, skip link.
   Page-specific rules live in the per-page stylesheet.

   Requires tokens.css to be loaded first.
   ========================================================================== */

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

h1, h2,
.section-header h2,
.hero h1 {
    font-family: var(--font-heading);
}

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    /* The fixed navbar is offset with scroll-padding on <html> rather than a
       hardcoded body padding, so it cannot fall out of sync when the navbar
       wraps to two lines. */
    padding-top: var(--navbar-height);
}

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

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

a {
    color: var(--primary-color);
}

a:hover {
    color: var(--primary-hover);
}

/* One focus treatment for the whole site. :focus-visible so pointer users
   don't get a ring on click, keyboard users always do. */
:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

/* Every interactive control clears the WCAG 2.5.5 target size. */
.btn,
.nav-link,
.dropdown-item,
.page-link {
    min-height: var(--touch-target-size);
    display: inline-flex;
    align-items: center;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 0.5rem;
    z-index: 10000;
    padding: 0.75rem 1.25rem;
    background: var(--primary-color);
    color: var(--text-inverse);
    text-decoration: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.skip-link:focus {
    top: 0;
    color: var(--text-inverse);
}

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */
.navbar {
    min-height: var(--navbar-height);
    background: color-mix(in srgb, var(--card) 92%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

/* color-mix is widely supported but not universal; this is the fallback. */
@supports not (background: color-mix(in srgb, red 50%, blue)) {
    .navbar {
        background: var(--card);
    }
}

.navbar-brand {
    font-weight: 700;
    color: var(--text) !important;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.navbar-brand:hover {
    color: var(--primary-color) !important;
}

.brand-text {
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.2;
}

.navbar .nav-link {
    color: var(--text) !important;
    font-weight: 500;
    padding-inline: 0.85rem;
    border-radius: var(--border-radius-sm);
}

.navbar .nav-link:hover,
.navbar .nav-link:focus-visible {
    color: var(--primary-color) !important;
    background: var(--surface-alt);
}

.navbar .nav-link[aria-current="page"] {
    color: var(--primary-color) !important;
    font-weight: 600;
}

.navbar-toggler {
    border: 1px solid var(--border);
    color: var(--text);
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* --------------------------------------------------------------------------
   Language switcher
   -------------------------------------------------------------------------- */
.language-switcher {
    display: flex;
    align-items: center;
}

.language-switcher .form-select {
    min-height: var(--touch-target-size);
    font-size: 0.875rem;
    padding-block: 0.35rem;
    background-color: var(--card);
    color: var(--text);
    border-color: var(--border);
    border-radius: var(--border-radius-sm);
    width: auto;
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section {
    padding: var(--section-spacing) 0;
}

.section-alt {
    background: var(--surface-alt);
}

@media (max-width: 767.98px) {
    .section {
        padding: 3rem 0;
    }
}

/* --------------------------------------------------------------------------
   Section headers
   -------------------------------------------------------------------------- */
.section-header {
    text-align: center;
    max-width: 46rem;
    margin: 0 auto 3rem;
}

.section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
    /* Deliberately a plain colour, not a clipped gradient. The previous
       `background: var(--gradient-primary)` + `-webkit-text-fill-color:
       transparent` made every section heading invisible while the gradient
       token was undefined, and it is a fragile pattern even when it works:
       any failure of background-clip leaves unreadable text. */
    color: var(--text);
}

.section-header h2 .accent {
    color: var(--primary-color);
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Hero banner (trainers, projects, calendar)
   -------------------------------------------------------------------------- */
.hero {
    background: var(--gradient-subtle);
    border-bottom: 1px solid var(--border);
    padding: clamp(2.5rem, 8vw, 5rem) 0;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 3.25rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 42rem;
}

.page-header {
    padding: clamp(2rem, 6vw, 3.5rem) 0 1.5rem;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn-primary-custom {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    font-weight: 600;
    padding: 0.75rem 1.75rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn-primary-custom:hover,
.btn-primary-custom:focus-visible {
    color: var(--text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.btn-secondary-custom {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    font-weight: 600;
    padding: 0.7rem 1.7rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn-secondary-custom:hover,
.btn-secondary-custom:focus-visible {
    background: var(--primary-color);
    color: var(--text-inverse);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card-custom {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
}

.card-custom:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
    border-color: color-mix(in srgb, var(--primary-color) 40%, var(--border));
}

.icon-primary { color: var(--primary-color); }
.icon-secondary { color: var(--kpa-indigo); }
.icon-success { color: var(--success-color); }
.icon-warning { color: var(--warning-color); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--dark-bg);
    color: #d5dce3;
    padding: 3.5rem 0 1.5rem;
    margin-top: var(--section-spacing);
}

.footer h2,
.footer h3 {
    color: var(--text-inverse);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
}

.footer a {
    color: #d5dce3;
    text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
    color: var(--kpa-sky);
    text-decoration: underline;
}

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

.footer li + li {
    margin-top: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid var(--dark-border);
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    font-size: 0.875rem;
    color: #9aa4b0;
}

.social-links {
    display: flex;
    gap: 0.5rem;
}

.social-links a {
    width: var(--touch-target-size);
    height: var(--touch-target-size);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--dark-border);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover,
.social-links a:focus-visible {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   CTA band (homepage, projects, trainers)
   -------------------------------------------------------------------------- */
.cta-band {
    background: var(--dark-bg);
    color: var(--text-inverse);
    border-radius: var(--border-radius-lg);
    padding: clamp(2rem, 6vw, 3rem);
    text-align: center;
}

.cta-band h2 {
    color: var(--text-inverse);
}

/* On the navy band the navy-outline button would vanish - invert it. */
.cta-band .btn-secondary-custom {
    color: var(--text-inverse);
    border-color: var(--text-inverse);
}

.cta-band .btn-secondary-custom:hover,
.cta-band .btn-secondary-custom:focus-visible {
    background: var(--text-inverse);
    color: var(--kpa-navy);
}

/* The primary button is navy-on-navy there too - give it the sky accent. */
.cta-band .btn-primary-custom {
    background: var(--kpa-sky);
    color: var(--kpa-navy-deep);
}

@media (max-width: 767.98px) {
    .cta-band .btn {
        width: 100%;
    }
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.page-link {
    color: var(--primary-color);
    border-color: var(--border);
    background: var(--card);
}

.page-item.active .page-link {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */
@media print {
    .navbar,
    .footer,
    .skip-link,
    .language-switcher,
    .btn {
        display: none !important;
    }

    body {
        padding-top: 0;
        background: #fff;
        color: #000;
    }

    .card-custom {
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
    }
}
