/* ==========================================================================
   components.css — Glass surfaces, header, buttons, cards, forms, footer
   ========================================================================== */

/* --------------------------------------------------------------------------
   Glass primitive
   Every frosted surface on the site is built from this one recipe.
   -------------------------------------------------------------------------- */

.glass {
    background: var(--glass);
    backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    border: 1px solid var(--glass-border);
    box-shadow: inset 0 1px 0 var(--glass-edge);
}

/* Browsers without backdrop-filter still get a usable, readable surface. */
@supports not (backdrop-filter: blur(1px)) {
    .glass {
        background: var(--bg-elev);
    }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.header {
    position: fixed;
    inset: 0 0 auto;
    z-index: var(--z-header);
    height: var(--header-h);
    display: flex;
    align-items: center;
    transition: background-color var(--dur-base) var(--ease-out),
        border-color var(--dur-base) var(--ease-out), backdrop-filter var(--dur-base) var(--ease-out);
    border-bottom: 1px solid transparent;
}

.header.is-scrolled {
    background: var(--glass);
    backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    border-bottom-color: var(--glass-border);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    width: 100%;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.brand__logo {
    width: auto;
    height: 30px;
    object-fit: contain;
}

/* Force the wordmark to one flat colour per theme. The PNGs carry internal
   shading/anti-aliasing that looks muddy on the warm light background. */
[data-theme="light"] .brand__logo {
    filter: brightness(0);
}

[data-theme="dark"] .brand__logo {
    filter: brightness(0) invert(1);
}

/* --- Nav --- */

.nav {
    display: flex;
    align-items: center;
    gap: 0.15rem;
}

.nav__link {
    position: relative;
    padding: 0.45rem 0.8rem;
    border-radius: var(--radius-pill);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

.nav__link:hover {
    color: var(--text);
    background: var(--glass-hover);
}

.nav__link[aria-current="page"] {
    color: var(--text);
}

.nav__link[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 1px;
    width: 14px;
    height: 2px;
    border-radius: var(--radius-pill);
    background: var(--accent);
    transform: translateX(-50%);
}

/* --- Controls --- */

.header__controls {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* --- Language switch --- */

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.lang-switch__btn {
    padding: 0.32rem 0.55rem;
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--text-faint);
    transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

.lang-switch__btn:hover {
    color: var(--text);
}

.lang-switch__btn[aria-pressed="true"] {
    background: var(--accent);
    color: var(--accent-contrast);
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-muted);
    font-size: 1.15rem;
    transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out);
}

.icon-btn:hover {
    color: var(--text);
    background: var(--glass-hover);
    border-color: var(--glass-border-hover);
}

.theme-toggle .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: inline-block;
}

.nav-toggle {
    display: none;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
    display: block;
    width: 17px;
    height: 1.5px;
    border-radius: 2px;
    background: currentColor;
    transition: transform var(--dur-base) var(--ease-out), background-color var(--dur-fast) linear;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
    content: "";
    position: absolute;
}

.nav-toggle__bars::before {
    transform: translateY(-5px);
}

.nav-toggle__bars::after {
    transform: translateY(5px);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
    transform: rotate(-45deg);
}

@media (max-width: 800px) {
    .nav-toggle {
        display: inline-flex;
        position: relative;
    }

    .nav {
        position: fixed;
        inset: var(--header-h) var(--gutter) auto;
        flex-direction: column;
        align-items: stretch;
        gap: 0.1rem;
        padding: var(--space-xs);
        border-radius: var(--radius-lg);
        background: var(--glass-strong);
        backdrop-filter: blur(28px) saturate(160%);
        -webkit-backdrop-filter: blur(28px) saturate(160%);
        border: 1px solid var(--glass-border);
        box-shadow: var(--shadow-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-6px) scale(0.98);
        transform-origin: top;
        transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out),
            visibility var(--dur-base);
    }

    .nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .nav__link {
        padding: 0.7rem 0.85rem;
        font-size: var(--fs-base);
    }

    .nav__link[aria-current="page"]::after {
        left: 0.85rem;
        bottom: auto;
        top: 50%;
        transform: translateY(-50%);
    }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.6rem;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    font-size: var(--fs-base);
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-base) var(--ease-out),
        color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out),
        box-shadow var(--dur-base) var(--ease-out);
}

.btn:hover {
    background: var(--accent-hover);
}

.btn:active {
    transform: scale(0.96);
}

.btn i {
    font-size: 1.15em;
    line-height: 1;
}

.btn--primary {
    background: var(--accent);
    color: var(--accent-contrast);
}

.btn--primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 12px 28px -14px var(--accent-line);
}

.btn--ghost {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: var(--glass-border);
    color: var(--text);
}

.btn--ghost:hover {
    background: var(--glass-hover);
    border-color: var(--glass-border-hover);
}

.btn--sm {
    padding: 0.5rem 0.95rem;
    font-size: var(--fs-xs);
}

.btn--block {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Badges, tags
   -------------------------------------------------------------------------- */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    background: var(--glass);
    font-size: var(--fs-xs);
    font-weight: 500;
    color: var(--text-muted);
}

.badge--accent {
    border-color: var(--accent-line);
    background: var(--accent-soft);
    color: var(--accent);
}

.badge__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2.6s ease-in-out infinite;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.22rem 0.55rem;
    border-radius: 6px;
    background: var(--glass-strong);
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--text-muted);
}

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

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--space-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    background: var(--glass);
    backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    box-shadow: inset 0 1px 0 var(--glass-edge);
    transition: transform var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out),
        border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}

.card--hover:hover {
    background: var(--glass-hover);
    border-color: var(--glass-border-hover);
    box-shadow: inset 0 1px 0 var(--glass-edge), var(--shadow-md);
}

.card__title {
    font-size: var(--fs-h4);
    font-weight: 600;
}

.card__text {
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

/* --------------------------------------------------------------------------
   Social links
   -------------------------------------------------------------------------- */

.socials {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.socials__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    background: var(--glass);
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: color var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out),
        border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.socials__link:hover {
    color: var(--text);
    background: var(--glass-hover);
    border-color: var(--glass-border-hover);
}

.socials--footer .socials__link {
    width: 36px;
    height: 36px;
    font-size: 1rem;
}

/* --------------------------------------------------------------------------
   Project cards
   -------------------------------------------------------------------------- */

.project {
    gap: var(--space-xs);
    height: 100%;
}

.project__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    margin-bottom: auto;
}

.project__lang {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--text-faint);
}

.project__title {
    font-size: var(--fs-lg);
    font-weight: 600;
}

.project__title a {
    color: inherit;
    transition: color var(--dur-fast) var(--ease-out);
}

/* Stretch the title link over the whole card so the card is one big target. */
.project__title a::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
}

.project:hover .project__title a {
    color: var(--accent);
}

.project__desc {
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

.project__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-top: auto;
    padding-top: var(--space-xs);
}

.project__links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding-top: var(--space-xs);
    border-top: 1px solid var(--glass-border);
    font-size: var(--fs-xs);
}

.project__link {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: color var(--dur-fast) var(--ease-out);
}

.project__link:hover {
    color: var(--accent);
}

/* --------------------------------------------------------------------------
   Filters
   -------------------------------------------------------------------------- */

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: var(--space-lg);
}

.filter {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    background: var(--glass);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out);
}

.filter:hover {
    color: var(--text);
    background: var(--glass-hover);
}

.filter[aria-pressed="true"] {
    background: var(--text);
    border-color: var(--text);
    color: var(--bg);
}

.filter__count {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    opacity: 0.55;
}

.project[hidden] {
    display: none;
}

/* --------------------------------------------------------------------------
   Timeline
   -------------------------------------------------------------------------- */

.timeline {
    position: relative;
    display: grid;
    gap: var(--space-md);
    padding-left: 1.75rem;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 0.4rem;
    bottom: 0.4rem;
    left: 5px;
    width: 1px;
    background: linear-gradient(180deg, var(--accent-line), var(--glass-border));
}

.timeline__item {
    position: relative;
}

.timeline__item::before {
    content: "";
    position: absolute;
    top: 0.45rem;
    left: -1.75rem;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--bg);
    border: 1.5px solid var(--accent);
    transform: translateX(-5px);
}

.timeline__period {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--accent);
}

.timeline__role {
    margin-top: 0.2rem;
    font-size: var(--fs-lg);
    font-weight: 600;
}

.timeline__org {
    font-size: var(--fs-sm);
    color: var(--text-faint);
}

.timeline__list {
    display: grid;
    gap: 0.3rem;
    margin-top: var(--space-xs);
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

/* --------------------------------------------------------------------------
   Skills
   -------------------------------------------------------------------------- */

.skill {
    display: grid;
    gap: 0.45rem;
}

.skill + .skill {
    margin-top: var(--space-sm);
}

.skill__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-sm);
    font-size: var(--fs-sm);
}

.skill__value {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-faint);
}

.skill__bar {
    height: 3px;
    border-radius: var(--radius-pill);
    background: var(--glass-strong);
    overflow: hidden;
}

.skill__fill {
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: var(--accent);
    transition: width 1.1s var(--ease-out);
}

.skill__fill.is-filled {
    /* Final width is written inline by main.js from data-skill-fill. */
    width: var(--skill-width, 100%);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */

.form {
    display: grid;
    gap: var(--space-sm);
}

.form__row {
    display: grid;
    gap: var(--space-sm);
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.field {
    display: grid;
    gap: 0.4rem;
}

.field__label {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-muted);
}

.field__label .req {
    color: var(--accent);
}

.field__control {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: var(--field-bg);
    color: var(--text);
    font-size: var(--fs-sm);
    transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

textarea.field__control {
    min-height: 140px;
    resize: vertical;
}

.field__control::placeholder {
    color: var(--text-faint);
}

.field__control:focus {
    outline: none;
    border-color: var(--accent-line);
    background: var(--glass);
}

.field.has-error .field__control {
    border-color: var(--danger);
}

.field__error {
    font-size: var(--fs-xs);
    color: var(--danger);
    min-height: 1em;
}

.field__hint {
    font-size: var(--fs-xs);
    color: var(--text-faint);
}

.field__counter {
    justify-self: end;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-faint);
}

.form__status {
    display: none;
    gap: 0.55rem;
    padding: 0.8rem 0.95rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    background: var(--glass);
}

.form__status.is-visible {
    display: flex;
    animation: rise var(--dur-base) var(--ease-out);
}

.form__status.is-success {
    border-color: var(--accent-line);
    color: var(--accent);
}

.form__status.is-error {
    border-color: var(--danger);
    color: var(--danger);
}

/* --------------------------------------------------------------------------
   Accordion
   -------------------------------------------------------------------------- */

.accordion {
    display: grid;
    gap: 0.5rem;
}

.accordion__item {
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: var(--glass);
    overflow: hidden;
    transition: background-color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.accordion__item[open] {
    background: var(--glass-hover);
    border-color: var(--glass-border-hover);
}

.accordion__trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    width: 100%;
    padding: 0.95rem 1.15rem;
    text-align: left;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text);
    list-style: none;
    transition: color var(--dur-fast) var(--ease-out);
}

.accordion__trigger::-webkit-details-marker {
    display: none;
}

.accordion__trigger:hover {
    color: var(--accent);
}

.accordion__trigger i {
    flex-shrink: 0;
    color: var(--text-faint);
    transition: transform var(--dur-base) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.accordion__item[open] .accordion__trigger i {
    transform: rotate(45deg);
    color: var(--accent);
}

.accordion__panel {
    padding: 0 1.15rem 1.05rem;
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
    margin-top: auto;
    border-top: 1px solid var(--glass-border);
    padding-block: var(--space-xl) var(--space-md);
}

.footer__grid {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1.5fr repeat(2, minmax(140px, 1fr));
}

.footer__text {
    margin-top: var(--space-sm);
    max-width: 40ch;
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

.footer__title {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: 400;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: var(--space-sm);
}

.footer__list {
    display: grid;
    gap: 0.5rem;
}

.footer__list a {
    color: var(--text-muted);
    font-size: var(--fs-sm);
    transition: color var(--dur-fast) var(--ease-out);
}

.footer__list a:hover {
    color: var(--accent);
}

.footer__bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--glass-border);
    color: var(--text-faint);
    font-size: var(--fs-xs);
}

@media (max-width: 680px) {
    .footer__grid {
        grid-template-columns: 1fr;
    }
}

/* --------------------------------------------------------------------------
   Back to top
   -------------------------------------------------------------------------- */

.back-to-top {
    position: fixed;
    right: var(--gutter);
    bottom: var(--gutter);
    z-index: var(--z-sticky);
    width: 42px;
    height: 42px;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    background: var(--glass-strong);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-muted);
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out),
        visibility var(--dur-base), color var(--dur-fast) var(--ease-out);
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.back-to-top:hover {
    color: var(--accent);
    border-color: var(--accent-line);
}