/* ── Site Header & Navigation ── */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    isolation: isolate;
    overflow: visible;
    height: var(--header-height);
    background: rgba(9, 9, 11, 0.88) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: none !important;
    padding: 0 !important;
}

.site-header .navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    height: var(--header-height);
    max-width: var(--max-wide);
    margin: 0 auto;
    padding: 0 2rem;
    background: transparent;
    border-bottom: none;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-brand__mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.65rem;
    letter-spacing: -0.02em;
}

.nav-brand__text {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
    justify-content: flex-end;
}

.navigation-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.125rem;
    padding: 0;
    margin: 0;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.625rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: color 0.15s ease, background 0.15s ease;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.04);
}

.nav-link--active {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.06);
}

.nav-chevron {
    width: 14px;
    height: 14px;
    opacity: 0.5;
    transition: transform 0.2s ease;
}

.nav-chevron--open {
    transform: rotate(180deg);
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown__panel {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 180px;
    padding: 0.25rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.nav-dropdown__item {
    display: block;
    padding: 0.5rem 0.625rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    font-weight: 400;
    transition: color 0.12s ease, background 0.12s ease;
}

.nav-dropdown__item:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.04);
}

.nav-dropdown__item--active {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.06);
}

.socials {
    display: flex;
    align-items: center;
    gap: 0.125rem;
    position: static;
    padding-left: 0.75rem;
    border-left: 1px solid var(--color-border);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    border: none;
    transition: color 0.15s ease, background 0.15s ease;
}

.social-link svg {
    width: 16px;
    height: 16px;
}

.social-link:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.04);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 32px;
    height: 32px;
    padding: 6px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.04);
}

.nav-toggle__bar {
    display: block;
    width: 100%;
    height: 1.5px;
    background: var(--color-text-secondary);
    border-radius: 1px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__bar--open:nth-child(1) {
    transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle__bar--open:nth-child(2) {
    opacity: 0;
}

.nav-toggle__bar--open:nth-child(3) {
    transform: translateY(-5.5px) rotate(-45deg);
}

.nav-mobile-overlay {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    min-height: 100vh;
    background: rgba(2, 6, 23, 0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 2147483647;
    pointer-events: auto;
}

.nav-mobile-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 2147483647;
    width: min(320px, 86vw);
    max-width: 320px;
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow-y: auto;
    box-shadow: -16px 0 40px rgba(0, 0, 0, 0.28);
}

.nav-mobile-links {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.nav-mobile-links .nav-link {
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
}

.nav-mobile-group__trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 400;
    font-family: inherit;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease, color 0.15s ease;
}

.nav-mobile-group__trigger:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text);
}

.nav-mobile-group__items {
    overflow: hidden;
    padding-left: 0.5rem;
}

.nav-mobile-sub {
    display: block;
    padding: 0.5rem 0.75rem;
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
    transition: color 0.12s ease, background 0.12s ease;
}

.nav-mobile-sub:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.04);
}

.nav-mobile-sub--active {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.06);
}

.nav-mobile-socials {
    display: flex;
    gap: 0.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

@media (max-width: 900px) {
    .navigation {
        padding: 0 1.25rem;
    }

    .nav-desktop {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }
}

@media (min-width: 901px) {
    .nav-mobile-overlay {
        display: none !important;
    }
}

/* ── Footer ── */

.site-footer {
    position: static;
    margin-top: auto;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    text-align: center;
    width: 100%;
    height: auto;
}

.site-footer p {
    margin: 0;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.01em;
}

.site-footer span {
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* ── Weather API page ── */

.weather-api__layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 1.5rem;
    align-items: start;
}

.weather-api__main {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    padding: 1.5rem;
}

.weather-api__sidebar {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    padding: 1.25rem;
    position: sticky;
    top: calc(var(--header-height) + 1rem);
}

.weather-api__sidebar-title {
    margin: 0 0 0.375rem;
    font-size: 0.9375rem;
    font-weight: 600;
}

.weather-api__sidebar-hint {
    margin: 0 0 1rem;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
}

.weather-api__controls-label {
    margin: 0 0 1rem;
    font-size: 0.9375rem;
    font-weight: 600;
}

.weather-api__stats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
}

.weather-api__stat {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.weather-api__stat strong {
    color: var(--color-text);
    font-weight: 600;
}

.weather-api__limit-notice {
    margin: 0 0 1rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(248, 113, 113, 0.3);
    background: rgba(248, 113, 113, 0.08);
    color: #f87171;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.weather-api__error {
    margin-top: 1rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(248, 113, 113, 0.3);
    background: rgba(248, 113, 113, 0.08);
    color: #f87171;
    font-size: 0.875rem;
}

.weather-api__result {
    margin-top: 1.5rem;
}

.weather-api__card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem;
    align-items: center;
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
}

.weather-api__city {
    margin: 0 0 0.75rem;
    font-size: 1.375rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.weather-api__details {
    display: grid;
    gap: 0.375rem;
}

.weather-api__details p {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.weather-api__details p span {
    color: var(--color-text);
    font-weight: 500;
}

.weather-api__icon img {
    width: 120px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

.weather-api__toggle {
    margin-top: 1rem;
}

.weather-api__raw {
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-code-bg);
    overflow-x: auto;
}

.weather-api__raw pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.weather-api__history-item {
    border-radius: var(--radius-sm) !important;
    margin-bottom: 0.25rem !important;
}

.weather-api__history-item.selected {
    background: rgba(255, 140, 0, 0.1) !important;
    border: 1px solid rgba(255, 140, 0, 0.25);
}

.api-button,
.raw-data {
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    position: relative;
    margin: 0;
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    transition: background 0.15s ease, border-color 0.15s ease;
    box-shadow: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
}

.api-button:hover {
    border-color: var(--color-border-strong);
    color: var(--color-text);
}

.api-button:active {
    transform: scale(0.98);
}

.dropdown-container {
    display: block;
    margin: 0;
}

.dropdown {
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s ease;
}

.dropdown:hover {
    border-color: var(--color-border-strong);
}

.dropdown option {
    font-size: 0.8125rem;
    background: var(--color-bg-elevated);
}

@media (max-width: 900px) {
    .weather-api__layout {
        grid-template-columns: 1fr;
    }

    .weather-api__sidebar {
        position: static;
    }

    .weather-api__card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .weather-api__icon {
        display: flex;
        justify-content: center;
    }
}

.notes-display::-webkit-scrollbar {
    width: 4px;
    background-color: transparent;
}

.notes-display::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
}

.notes-display {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

/* ── Project page header ── */

.project-page-header {
    margin: 0 0 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.project-page-header__back {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.15s ease;
}

.project-page-header__back svg {
    width: 14px;
    height: 14px;
}

.project-page-header__back:hover {
    color: var(--color-accent);
}

.project-page-header__label {
    margin: 0 0 0.375rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.project-page-header__title {
    margin: 0 0 0.5rem;
    font-size: clamp(1.375rem, 3vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.03em;
}

.project-page-header__desc {
    max-width: 640px;
    margin: 0 0 1rem;
    font-size: 0.875rem;
    line-height: 1.65;
    color: var(--color-text-muted);
}

.project-page-header__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.project-page-header__tech li {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0.25rem 0.625rem;
    border-radius: 4px;
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.03);
}

/* ── API Server demo ── */

.api-server-demo {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-code-bg);
}

.api-server-demo__error {
    padding: 1.5rem;
    font-size: 0.875rem;
    line-height: 1.65;
    color: #f87171;
}

.api-server-demo__error code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.api-server-demo__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.api-server-demo__endpoint {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.api-server-demo__status {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    color: #22c55e;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    background: rgba(34, 197, 94, 0.1);
}

.api-server-demo__json {
    margin: 0;
    padding: 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}