/* ==========================================================================
   Cognisn Website — Site-specific styles
   Built on top of theme.css and base.css design tokens
   ========================================================================== */

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

body {
    background: var(--app-body-bg);
    background-attachment: fixed;
    color: var(--app-text-primary);
    font-family: var(--app-font-body);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    padding-top: var(--app-navbar-height);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */

.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    height: var(--app-navbar-height);
    background: var(--app-nav-bg);
    border-bottom: 1px solid var(--app-nav-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--app-shadow-sm);
    display: flex;
    align-items: center;
}

.site-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.site-nav__brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    color: var(--app-text-primary);
}

.site-nav__brand svg {
    height: 36px;
    width: auto;
}

.site-nav__brand-name {
    font-family: var(--app-font-brand);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
}

.site-nav__links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav__links a {
    color: var(--app-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    transition: var(--app-transition-fast);
}

.site-nav__links a:hover {
    color: var(--app-text-primary);
    background: var(--app-hover-bg);
    text-decoration: none;
}

.site-nav__links a.active {
    color: var(--app-accent);
    background: var(--app-active-bg);
}

/* Mobile menu toggle */
.site-nav__toggle {
    display: none;
    background: none;
    border: 1px solid var(--app-border-strong);
    border-radius: 0.375rem;
    color: var(--app-text-primary);
    padding: 0.375rem 0.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
}

@media (max-width: 768px) {
    .site-nav__toggle {
        display: block;
    }

    .site-nav__links {
        display: none;
        position: absolute;
        top: var(--app-navbar-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--app-nav-bg);
        border-bottom: 1px solid var(--app-nav-border);
        backdrop-filter: blur(12px);
        padding: 0.5rem;
        box-shadow: var(--app-shadow);
    }

    .site-nav__links.open {
        display: flex;
    }

    .site-nav__links a {
        padding: 0.75rem 1rem;
        width: 100%;
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */

.hero {
    padding: 8rem 0 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/hero-bg.svg') center/cover no-repeat;
    pointer-events: none;
    z-index: 0;
}

.hero > .container {
    position: relative;
    z-index: 1;
}

.hero__logo {
    margin-bottom: 2rem;
}

.hero__logo svg {
    width: min(440px, 85vw);
    height: auto;
    filter: drop-shadow(0 0 12px rgba(90, 170, 232, 0.2));
}

.hero__tagline {
    font-family: var(--app-font-heading);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--app-text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.hero__subtitle {
    font-size: clamp(0.9375rem, 2vw, 1.0625rem);
    color: var(--app-text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--app-transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--app-accent), var(--app-accent-dark));
    color: #fff;
    box-shadow: 0 2px 8px var(--app-accent-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--app-accent-glow);
    text-decoration: none;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--app-accent);
    border-color: var(--app-accent-border);
}

.btn-outline:hover {
    background: var(--app-accent);
    color: var(--app-text-on-accent);
    box-shadow: 0 4px 16px var(--app-accent-glow);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Section Headers
   -------------------------------------------------------------------------- */

.section-label {
    font-family: var(--app-font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--app-accent);
    margin-bottom: 0.5rem;
}

.section-title {
    font-family: var(--app-font-heading);
    font-size: clamp(1.375rem, 3vw, 1.75rem);
    font-weight: 700;
    color: var(--app-text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--app-text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

/* --------------------------------------------------------------------------
   Cards (Projects, Blog, etc.)
   -------------------------------------------------------------------------- */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--app-card-bg);
    border: 1px solid var(--app-card-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--app-shadow);
    transition: var(--app-transition);
}

.card:hover {
    box-shadow: var(--app-shadow), var(--app-shadow-glow);
    border-color: var(--app-accent-border);
    transform: translateY(-2px);
}

.card__label {
    display: inline-flex;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.card__label--oss {
    background: var(--app-success-bg);
    color: var(--app-success);
    border: 1px solid var(--app-success-border);
}

.card__title {
    font-family: var(--app-font-heading);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--app-text-primary);
    margin-bottom: 0.5rem;
}

.card__title a {
    color: inherit;
    text-decoration: none;
}

.card__title a:hover {
    color: var(--app-accent);
    text-decoration: none;
}

.card__desc {
    font-size: 0.875rem;
    color: var(--app-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.card__meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--app-text-muted);
}

.card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: 1rem;
}

.tag {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--app-accent-subtle);
    color: var(--app-accent);
    border: 1px solid var(--app-accent-border);
}

/* --------------------------------------------------------------------------
   Video Embed (responsive 16:9)
   -------------------------------------------------------------------------- */

.video-embed {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 0.75rem;
    border: 1px solid var(--app-card-border);
    box-shadow: var(--app-shadow);
    margin: 1.5rem 0;
}

.video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* --------------------------------------------------------------------------
   Blog Article
   -------------------------------------------------------------------------- */

.article {
    max-width: 740px;
    margin: 0 auto;
    padding: 3rem 1.5rem 5rem;
}

.article__header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--app-border);
}

.article__title {
    font-family: var(--app-font-heading);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    color: var(--app-text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.article__meta {
    font-size: 0.875rem;
    color: var(--app-text-muted);
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.article__body {
    color: var(--app-text-secondary);
    font-size: 1rem;
    line-height: 1.8;
}

.article__body h2 {
    font-family: var(--app-font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--app-text-primary);
    margin: 2.5rem 0 1rem;
}

.article__body h3 {
    font-family: var(--app-font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--app-text-primary);
    margin: 2rem 0 0.75rem;
}

.article__body p {
    margin-bottom: 1.25rem;
}

.article__body a {
    color: var(--app-accent);
}

.article__body a.btn {
    color: inherit;
}

.article__body a.btn-primary {
    color: #fff;
}

.article__body a.btn-outline {
    color: var(--app-accent);
}

.article__body code {
    background: var(--app-bg-tertiary);
    padding: 0.15rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.875em;
}

.article__body pre {
    background: var(--app-bg-secondary);
    border: 1px solid var(--app-border-strong);
    border-radius: 0.5rem;
    padding: 1.25rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.article__body pre code {
    background: none;
    padding: 0;
}

.article__body blockquote {
    border-left: 3px solid var(--app-accent);
    padding: 0.75rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--app-accent-subtle);
    border-radius: 0 0.375rem 0.375rem 0;
    color: var(--app-text-secondary);
}

.article__body ul, .article__body ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.article__body li {
    margin-bottom: 0.375rem;
}

/* --------------------------------------------------------------------------
   Screenshots
   -------------------------------------------------------------------------- */

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.screenshot {
    margin: 0;
}

.screenshot img {
    width: 100%;
    border-radius: 0.5rem;
    border: 1px solid var(--app-card-border);
    box-shadow: var(--app-shadow);
}

.screenshot figcaption {
    font-size: 0.8125rem;
    color: var(--app-text-muted);
    margin-top: 0.5rem;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Release Downloads Table
   -------------------------------------------------------------------------- */

.release-table-wrap {
    overflow-x: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--app-border);
}

.release-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.release-table thead th {
    background: var(--app-accent-subtle);
    color: var(--app-accent);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.625rem 1rem;
    text-align: left;
    border-bottom: 2px solid var(--app-border);
    white-space: nowrap;
}

.release-table tbody tr {
    border-bottom: 1px solid var(--app-border);
    transition: var(--app-transition-fast);
}

.release-table tbody tr:last-child {
    border-bottom: none;
}

.release-table tbody tr:hover {
    background: var(--app-hover-bg);
}

.release-table td {
    padding: 0.75rem 1rem;
    white-space: nowrap;
    color: var(--app-text-secondary);
}

.release-table__platform {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    color: var(--app-text-primary);
}

.release-table__icon {
    color: var(--app-accent);
    flex-shrink: 0;
    display: inline-flex;
}

.release-table__icon svg {
    width: 20px;
    height: 20px;
}

.release-table__size {
    color: var(--app-text-muted);
}

.release-table__action {
    text-align: right;
}

.btn--sm {
    padding: 0.3rem 0.75rem;
    font-size: 0.8125rem;
    border-radius: 0.375rem;
}


@media (max-width: 640px) {
    .release-table__format,
    .release-table__arch {
        display: none;
    }

    .release-table thead th:nth-child(2),
    .release-table thead th:nth-child(3) {
        display: none;
    }
}

/* --------------------------------------------------------------------------
   Release Widget (CognisReleases)
   -------------------------------------------------------------------------- */

.release-section {
    background: var(--app-card-bg);
    border: 1px solid var(--app-card-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--app-shadow);
    margin-bottom: 1.5rem;
}

.release-section--pre {
    opacity: 0.85;
}

.release-section--pypi {
    border-style: dashed;
}

.release-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.release-header__title {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.release-header__meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.release-badge {
    display: inline-block;
    padding: 0.2rem 0.625rem;
    border-radius: 0.375rem;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    position: relative;
    top: -0.1em;
    white-space: nowrap;
}

.release-badge--stable {
    background: var(--app-success-bg);
    color: var(--app-success);
    border: 1px solid var(--app-success-border);
}

.release-badge--pre {
    background: var(--app-warning-bg);
    color: var(--app-warning);
    border: 1px solid var(--app-warning-border);
}

.release-badge--pypi {
    background: var(--app-info-bg);
    color: var(--app-info);
    border: 1px solid var(--app-info-border);
}

.release-version {
    font-family: var(--app-font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--app-text-primary);
    margin: 0;
}

.release-date {
    color: var(--app-text-muted);
}

.release-github-link {
    color: var(--app-accent);
    text-decoration: none;
    font-weight: 500;
}

.release-github-link:hover {
    text-decoration: underline;
}

.release-notes {
    font-size: 0.875rem;
    color: var(--app-text-secondary);
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--app-border);
    line-height: 1.6;
}

.release-notes ul {
    margin: 0;
    padding-left: 1.25rem;
}

.release-notes li {
    margin-bottom: 0.25rem;
}

.release-downloads__heading {
    font-family: var(--app-font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--app-text-muted);
    margin: 0 0 0.75rem;
}

/* Loading state */
.release-loading {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--app-text-muted);
    font-size: 0.875rem;
}

.release-loading__spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--app-border);
    border-top-color: var(--app-accent);
    border-radius: 50%;
    animation: app-spin 0.75s linear infinite;
}

@keyframes app-spin {
    to { transform: rotate(360deg); }
}

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.25rem;
    max-width: 740px;
}

.about-content p {
    color: var(--app-text-secondary);
    font-size: 1rem;
    line-height: 1.8;
}

.about-profile {
    display: flex;
    gap: 2.5rem;
    align-items: flex-start;
}

.about-profile__photo {
    flex-shrink: 0;
}

.about-profile__photo img {
    border-radius: 0.75rem;
    border: 2px solid var(--app-card-border);
    box-shadow: var(--app-shadow);
}

.about-profile__links {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .about-profile {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .about-profile__links {
        justify-content: center;
    }
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 500px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--app-card-bg);
    border: 1px solid var(--app-card-border);
    border-radius: 0.5rem;
    color: var(--app-text-primary);
    text-decoration: none;
    transition: var(--app-transition);
}

.contact-link:hover {
    border-color: var(--app-accent-border);
    box-shadow: var(--app-shadow-glow);
    transform: translateY(-1px);
    text-decoration: none;
    color: var(--app-text-primary);
}

.contact-link__icon {
    color: var(--app-accent);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-link__label {
    font-weight: 500;
    font-size: 0.9375rem;
}

.contact-link__value {
    font-size: 0.8125rem;
    color: var(--app-text-muted);
}

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

.site-footer {
    border-top: 1px solid var(--app-nav-border);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.8125rem;
    color: var(--app-text-muted);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */

::selection {
    background: var(--app-accent);
    color: var(--app-text-on-accent);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--app-scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--app-scrollbar-thumb);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--app-scrollbar-thumb-hover);
}

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

hr {
    border: none;
    border-top: 1px solid var(--app-border);
    margin: 3rem 0;
}