/*
    components.css
    Reusable visual components: buttons, cards, nav menu styling, the
    mobile menu toggle, media placeholders, and small badges/pills.
    Implements the project's visual language: bold gradients, glossy
    buttons, soft shadows, rounded corners, and slightly heavier
    borders than a typical minimalist site.
*/

/* ---------------------------------------------------------------------
   Skip link
   ------------------------------------------------------------------ */

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    z-index: var(--z-skip-link);
    background-color: var(--color-white);
    color: var(--color-blue-900);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-weight: 700;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-3);
}

/* ---------------------------------------------------------------------
   Brand wordmark
   ------------------------------------------------------------------ */

.brand__word {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.375rem;
    color: var(--color-text-on-dark);
    letter-spacing: -0.01em;
}

/* ---------------------------------------------------------------------
   Navigation menu + mobile toggle
   ------------------------------------------------------------------ */

.nav-toggle {
    border-radius: var(--radius-sm);
}

.nav-toggle__bar {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--color-white);
    border-radius: var(--radius-pill);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-menu {
    background: linear-gradient(160deg, var(--color-bg-header) 0%, var(--color-blue-600) 130%);
    border-bottom: var(--border-width) solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-md);

    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base),
        visibility 0s linear var(--transition-base);
}

.nav-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility 0s linear 0s;
}

.nav-menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: 700;
    color: var(--color-text-on-dark);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: var(--fs-small);
    transition: background-color var(--transition-fast);
}

.nav-menu a:hover {
    background-color: rgba(255, 255, 255, 0.12);
}

.nav-menu a[aria-current='page'] {
    background-color: var(--color-yellow-500);
    color: var(--color-blue-900);
}

/* ---------------------------------------------------------------------
   Buttons — glossy, gradient-filled, per the project's visual language
   ------------------------------------------------------------------ */

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: var(--fs-small);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: var(--border-width) solid transparent;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

/* Glossy top-half highlight, a classic 2000s "web 2.0" button effect */
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.35) 0%, rgba(255, 255, 255, 0) 55%);
    pointer-events: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn--primary {
    background: linear-gradient(180deg, var(--color-yellow-500) 0%, var(--color-yellow-700) 100%);
    border-color: var(--color-yellow-900);
    color: var(--color-blue-900);
}

.btn--blue {
    background: linear-gradient(180deg, var(--color-blue-600) 0%, var(--color-blue-700) 100%);
    border-color: var(--color-blue-900);
    color: var(--color-white);
}

.btn--green {
    background: linear-gradient(180deg, var(--color-green-600) 0%, var(--color-green-800) 100%);
    border-color: var(--color-green-900);
    color: var(--color-white);
}

.btn--pink {
    background: linear-gradient(180deg, var(--color-pink-600) 0%, var(--color-pink-800) 100%);
    border-color: var(--color-pink-900);
    color: var(--color-white);
}

/* ---------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------ */

.card {
    background-color: var(--color-bg-surface);
    border: var(--border-width) solid var(--color-border-default);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: var(--space-5);
    right: var(--space-5);
    height: 4px;
    border-radius: var(--radius-pill);
    background: linear-gradient(
        90deg,
        var(--color-blue-600),
        var(--color-pink-600),
        var(--color-yellow-500)
    );
}

.card .media-placeholder {
    margin-inline: calc(var(--space-5) * -1);
    margin-top: calc(var(--space-5) * -1);
    margin-bottom: var(--space-2);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    overflow: hidden;
}

.card .btn {
    align-self: flex-start;
    margin-top: auto;
}

.update-card {
    background-color: var(--color-bg-surface);
    border: var(--border-width) solid var(--color-border-default);
    border-left: var(--border-width-thick) solid var(--color-pink-600);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--space-4) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.update-card__date {
    color: var(--color-text-muted);
    font-size: var(--fs-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
}

.update-card a {
    color: var(--color-link);
    font-weight: 700;
}

.update-card a:hover {
    text-decoration: underline;
}

/* ---------------------------------------------------------------------
   Media placeholders
   ------------------------------------------------------------------ */

.media-placeholder {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: var(--border-width) solid var(--color-border-default);
    background-color: var(--color-neutral-200);
}

.media-placeholder img {
    width: 100%;
    height: auto;
}

.media-placeholder__label {
    position: absolute;
    bottom: var(--space-3);
    left: var(--space-3);
    background-color: rgba(var(--color-blue-900-rgb), 0.85);
    color: var(--color-white);
    font-size: var(--fs-small);
    font-weight: 700;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-pill);
}

.media-placeholder--hero {
    box-shadow: var(--shadow-lg);
}

/* ---------------------------------------------------------------------
   Footer social placeholders
   ------------------------------------------------------------------ */

.social-placeholder {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-pill);
    border: var(--border-width) solid rgba(255, 255, 255, 0.3);
    transition: background-color var(--transition-fast);
}

.social-placeholder:hover {
    background-color: rgba(255, 255, 255, 0.12);
}

.social-placeholder span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-white);
}