/* ============================================================
   AEVUM APP SHELL v1
   Global layout system
   Header / Navigation / Drawer / Footer
   ============================================================ */


/* ============================================================
   APP SHELL TOKENS
   ============================================================ */

:root {
    --header-height: 72px;

    --shell-z-header: 300;
    --shell-z-overlay: 400;
    --shell-z-drawer: 500;

    --shell-transition-fast: 150ms ease;
    --shell-transition-base: 250ms ease;
    --shell-transition-drawer: 400ms cubic-bezier(0.22, 1, 0.36, 1);

    --shell-drawer-width: 380px;
    --shell-drawer-max-width: 90vw;
}


/* ============================================================
   GLOBAL PAGE OFFSET
   Fixed header requires content compensation.
   ============================================================ */

body {
    padding-top: var(--header-height);
}


/* ============================================================
   HEADER
   ============================================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    z-index: var(--shell-z-header);

    height: var(--header-height);

    background: rgba(6, 20, 38, 0.86);

    border-bottom: 1px solid var(--color-border);

    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);

    transition:
        background-color var(--shell-transition-base),
        border-color var(--shell-transition-base),
        box-shadow var(--shell-transition-base);
}


/* Light theme surface */

[data-theme="light"] .header {
    background: rgba(245, 247, 250, 0.88);
}


/* ============================================================
   HEADER INNER
   ============================================================ */

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;

    width: 100%;
    height: 100%;

    max-width: var(--container-max);

    margin: 0 auto;

    padding:
        0
        var(--container-padding);
}


/* ============================================================
   BRAND
   ============================================================ */

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

    gap: 10px;

    min-width: 0;

    color: var(--color-text-primary);

    text-decoration: none;

    font-size: 20px;
    font-weight: 700;

    line-height: 1;

    border-radius: 8px;

    transition:
        opacity var(--shell-transition-fast);
}

.brand:hover {
    opacity: 0.9;
}

.brand:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 4px;
}


/* ============================================================
   BRAND ICON
   ============================================================ */

.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    flex: 0 0 auto;

    width: 36px;
    height: 36px;
}

.brand-icon svg {
    display: block;

    width: 100%;
    height: 100%;
}


/* ============================================================
   BRAND TEXT
   ============================================================ */

.brand-text {
    color: var(--color-accent-gold);

    font-size: 18px;
    font-weight: 700;

    letter-spacing: 2px;

    white-space: nowrap;
}


/* ============================================================
   DESKTOP NAVIGATION
   ============================================================ */

.header-nav-desktop {
    display: flex;
    align-items: center;

    gap: 28px;

    margin-left: auto;
    margin-right: 32px;
}

.header-nav-desktop a {
    position: relative;

    display: inline-flex;
    align-items: center;

    min-height: 40px;

    color: var(--color-text-secondary);

    text-decoration: none;

    font-size: 14px;
    font-weight: 500;

    white-space: nowrap;

    transition:
        color var(--shell-transition-fast);
}

.header-nav-desktop a:hover {
    color: var(--color-accent-gold);
}

.header-nav-desktop a.active {
    color: var(--color-accent-gold);
}


/* Active indicator */

.header-nav-desktop a.active::after {
    content: "";

    position: absolute;

    left: 0;
    right: 0;
    bottom: 2px;

    height: 2px;

    background: var(--color-accent-gold);

    border-radius: 999px;
}


/* Keyboard focus */

.header-nav-desktop a:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 4px;
    border-radius: 4px;
}


/* ============================================================
   HEADER ACTIONS
   ============================================================ */

.header-actions {
    display: flex;
    align-items: center;

    gap: 10px;

    flex: 0 0 auto;
}


/* ============================================================
   THEME TOGGLE
   ============================================================ */

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 36px;
    height: 36px;

    padding: 0;

    border: 1px solid var(--color-border);
    border-radius: 999px;

    background: var(--color-bg-surface);
    color: var(--color-text-secondary);

    cursor: pointer;

    transition:
        color var(--shell-transition-fast),
        background-color var(--shell-transition-fast),
        border-color var(--shell-transition-fast),
        transform var(--shell-transition-fast);
}

.theme-toggle:hover {
    color: var(--color-accent-gold);
    border-color: var(--color-accent-gold);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 3px;
}

.theme-toggle svg {
    display: block;
    stroke: currentColor;
}


/* ============================================================
   BURGER
   ============================================================ */

.burger {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;

    width: 36px;
    height: 36px;

    padding: 6px;

    border: 0;
    border-radius: 8px;

    background: transparent;

    cursor: pointer;

    gap: 5px;

    transition:
        background-color var(--shell-transition-fast);
}

.burger:hover {
    background: var(--color-bg-surface);
}

.burger:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 3px;
}

.burger span {
    display: block;

    width: 22px;
    height: 2px;

    background: var(--color-text-primary);

    border-radius: 999px;

    transform-origin: center;

    transition:
        transform var(--shell-transition-base),
        opacity var(--shell-transition-base);
}

.burger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.burger.active span:nth-child(2) {
    opacity: 0;
}

.burger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}


/* ============================================================
   OVERLAY
   ============================================================ */

.overlay {
    position: fixed;
    inset: 0;

    z-index: var(--shell-z-overlay);

    background: rgba(2, 9, 20, 0.62);

    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);

    opacity: 0;
    visibility: hidden;

    pointer-events: none;

    transition:
        opacity var(--shell-transition-base),
        visibility var(--shell-transition-base);
}

.overlay.active {
    opacity: 1;
    visibility: visible;

    pointer-events: auto;
}


/* ============================================================
   SIDE NAVIGATION DRAWER
   ============================================================ */

.side-nav {
    position: fixed;

    top: 0;
    right: 0;

    width: var(--shell-drawer-width);
    max-width: var(--shell-drawer-max-width);

    height: 100vh;
    height: 100dvh;

    z-index: var(--shell-z-drawer);

    display: flex;
    flex-direction: column;

    padding: 32px 28px;

    overflow-y: auto;
    overscroll-behavior: contain;

    background: var(--color-bg-primary);

    border-left: 1px solid var(--color-border);

    transform: translateX(100%);

    visibility: hidden;

    transition:
        transform var(--shell-transition-drawer),
        visibility var(--shell-transition-drawer);
}

[data-theme="light"] .side-nav {
    background: var(--color-bg-primary);
}

.side-nav.active {
    transform: translateX(0);

    visibility: visible;
}


/* ============================================================
   DRAWER HEADER
   ============================================================ */

.side-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;

    flex: 0 0 auto;

    padding-bottom: 24px;

    margin-bottom: 28px;

    border-bottom: 1px solid var(--color-border);
}

.side-nav-header .brand {
    font-size: 18px;
}


/* ============================================================
   DRAWER CLOSE
   ============================================================ */

.side-nav-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 36px;
    height: 36px;

    padding: 0;

    border: 1px solid var(--color-border);
    border-radius: 999px;

    background: transparent;
    color: var(--color-text-secondary);

    cursor: pointer;

    transition:
        color var(--shell-transition-fast),
        border-color var(--shell-transition-fast),
        background-color var(--shell-transition-fast);
}

.side-nav-close:hover {
    color: var(--color-accent-gold);
    border-color: var(--color-accent-gold);
    background: var(--color-bg-surface);
}

.side-nav-close:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 3px;
}

.side-nav-close svg {
    display: block;
    stroke: currentColor;
}


/* ============================================================
   DRAWER MENU
   ============================================================ */

.side-nav-menu {
    display: flex;
    flex-direction: column;

    gap: 4px;

    flex: 1 1 auto;
}


/* ============================================================
   NAV GROUP
   ============================================================ */

.side-nav-menu .nav-group {
    margin-bottom: 16px;
}

.side-nav-menu .nav-group:last-child {
    margin-bottom: 0;
}


/* ============================================================
   NAV GROUP TITLE
   ============================================================ */

.side-nav-menu .nav-group-title {
    display: block;

    margin-bottom: 7px;

    color: var(--color-text-muted);

    font-size: 11px;
    font-weight: 600;

    line-height: 1.4;

    text-transform: uppercase;

    letter-spacing: 1px;
}


/* ============================================================
   DRAWER LINKS
   ============================================================ */

.side-nav-menu a {
    position: relative;

    display: flex;
    align-items: center;

    min-height: 40px;

    padding: 8px 12px 8px 14px;

    color: var(--color-text-secondary);

    text-decoration: none;

    border-radius: 8px;

    font-size: 15px;
    font-weight: 500;

    transition:
        color var(--shell-transition-fast),
        background-color var(--shell-transition-fast);
}

.side-nav-menu a:hover {
    color: var(--color-accent-gold);
    background: var(--color-bg-surface);
}

.side-nav-menu a:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 2px;
}


/* Active drawer item */

.side-nav-menu a.active {
    color: var(--color-accent-gold);

    background: rgba(245, 197, 66, 0.07);
}


/* Active indicator */

.side-nav-menu a.active::before {
    content: "";

    position: absolute;

    left: 0;
    top: 8px;
    bottom: 8px;

    width: 2px;

    background: var(--color-accent-gold);

    border-radius: 999px;
}


/* ============================================================
   DRAWER FOOTER
   ============================================================ */

.side-nav-footer {
    flex: 0 0 auto;

    margin-top: 28px;

    padding-top: 20px;

    border-top: 1px solid var(--color-border);
}


/* ============================================================
   THEME ROW
   ============================================================ */

.side-nav-footer .theme-row {
    display: flex;
    align-items: center;
    justify-content: space-between;

    min-height: 40px;
}

.side-nav-footer .theme-label {
    color: var(--color-text-secondary);

    font-size: 14px;
    font-weight: 500;
}


/* ============================================================
   NETWORK STATUS
   ============================================================ */

.side-nav-footer .network-status {
    display: flex;
    align-items: center;

    gap: 8px;

    margin-top: 10px;

    color: var(--color-text-muted);

    font-size: 13px;
}

.side-nav-footer .network-status .dot,
.footer-network .dot {
    width: 7px;
    height: 7px;

    flex: 0 0 auto;

    border-radius: 999px;

    background: var(--color-accent-cyan);

    box-shadow:
        0 0 8px rgba(32, 217, 255, 0.45);

    animation: pulse-dot 2.5s ease-in-out infinite;
}


/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    margin-top: 64px;

    padding: 48px 0 32px;

    background: var(--color-bg-deep);

    border-top: 1px solid var(--color-border);
}


/* ============================================================
   FOOTER CONTENT
   ============================================================ */

.footer-content {
    display: grid;

    grid-template-columns: minmax(220px, 1fr) minmax(0, 2.5fr);

    gap: 56px;

    padding-bottom: 32px;

    border-bottom: 1px solid var(--color-border);
}


/* ============================================================
   FOOTER BRAND
   ============================================================ */

.footer-brand-link {
    display: inline-flex;
    align-items: center;

    gap: 10px;

    width: fit-content;

    text-decoration: none;

    border-radius: 8px;
}

.footer-brand-link:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 4px;
}

.footer-brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 32px;
    height: 32px;
}

.footer-brand-icon svg {
    display: block;

    width: 100%;
    height: 100%;
}

.footer-brand-name {
    color: var(--color-accent-gold);

    font-size: 18px;
    font-weight: 700;

    letter-spacing: 2px;
}

.footer-tagline {
    max-width: 280px;

    margin: 10px 0 0;

    color: var(--color-text-muted);

    font-size: 14px;
    line-height: 1.6;
}


/* ============================================================
   FOOTER LINKS
   Five logical groups
   ============================================================ */

.footer-links {
    display: grid;

    grid-template-columns: repeat(5, minmax(0, 1fr));

    gap: 28px;
}

.footer-group {
    min-width: 0;
}

.footer-group-title {
    display: block;

    margin-bottom: 10px;

    color: var(--color-text-muted);

    font-size: 11px;
    font-weight: 600;

    line-height: 1.4;

    text-transform: uppercase;

    letter-spacing: 1px;
}

.footer-group a {
    display: block;

    padding: 4px 0;

    color: var(--color-text-secondary);

    text-decoration: none;

    font-size: 14px;
    line-height: 1.5;

    transition:
        color var(--shell-transition-fast);
}

.footer-group a:hover {
    color: var(--color-accent-gold);
}

.footer-group a:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 3px;

    border-radius: 3px;
}


/* ============================================================
   FOOTER BOTTOM
   ============================================================ */

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 16px;

    padding-top: 24px;

    color: var(--color-text-muted);

    font-size: 13px;

    flex-wrap: wrap;
}


/* ============================================================
   FOOTER NETWORK
   ============================================================ */

.footer-network {
    display: inline-flex;
    align-items: center;

    gap: 8px;

    white-space: nowrap;
}


/* ============================================================
   FOOTER COPYRIGHT
   ============================================================ */

.footer-copyright {
    text-align: center;
}


/* ============================================================
   FOOTER LEGAL
   ============================================================ */

.footer-legal {
    display: flex;
    align-items: center;

    gap: 20px;
}

.footer-legal a {
    color: var(--color-text-muted);

    text-decoration: none;

    font-size: 13px;

    transition:
        color var(--shell-transition-fast);
}

.footer-legal a:hover {
    color: var(--color-accent-gold);
}

.footer-legal a:focus-visible {
    outline: 2px solid var(--color-accent-gold);
    outline-offset: 3px;

    border-radius: 3px;
}


/* ============================================================
   TABLET
   ============================================================ */

@media (max-width: 1200px) {

    .header-nav-desktop {
        gap: 20px;
        margin-right: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .footer-links {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}


/* ============================================================
   MOBILE NAVIGATION BREAKPOINT
   ============================================================ */

@media (max-width: 1024px) {

    .header-nav-desktop {
        display: none;
    }

    .burger {
        display: inline-flex;
    }

    .header-actions {
        gap: 8px;
    }
}


/* ============================================================
   TABLET / LARGE MOBILE
   ============================================================ */

@media (max-width: 768px) {

    :root {
        --header-height: 64px;
    }

    .header-inner {
        padding-left: 16px;
        padding-right: 16px;
    }

    .brand-icon {
        width: 32px;
        height: 32px;
    }

    .brand-text {
        font-size: 16px;
        letter-spacing: 1.7px;
    }

    .footer {
        margin-top: 48px;
        padding: 40px 0 28px;
    }

    .footer-links {
        grid-template-columns: repeat(2, minmax(0, 1fr));

        gap: 28px 24px;
    }

    .footer-bottom {
        align-items: flex-start;

        flex-direction: column;

        gap: 10px;
    }

    .footer-copyright {
        text-align: left;
    }
}


/* ============================================================
   SMALL MOBILE
   ============================================================ */

@media (max-width: 480px) {

    .header-actions {
        gap: 4px;
    }

    .theme-toggle,
    .burger {
        width: 34px;
        height: 34px;
    }

    .side-nav {
        width: 100%;
        max-width: 100%;

        padding:
            24px
            20px;
    }

    .side-nav-header {
        padding-bottom: 20px;
        margin-bottom: 24px;
    }

    .side-nav-menu .nav-group {
        margin-bottom: 14px;
    }

    .side-nav-menu a {
        min-height: 42px;

        padding-top: 9px;
        padding-bottom: 9px;
    }

    .footer-links {
        grid-template-columns: 1fr;

        gap: 22px;
    }

    .footer-legal {
        gap: 16px;
    }
}


/* ============================================================
   REDUCED MOTION
   Accessibility / motion sensitivity
   ============================================================ */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}


/* ============================================================
   KEYFRAMES
   ============================================================ */

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.45;
        transform: scale(0.85);
    }
}

/* ============================================================
   AEVUM APP SHELL — MOBILE DRAWER HARDENING
   ============================================================ */

.side-nav {
    box-sizing: border-box;
    max-width: calc(100vw - 24px);
}

.side-nav,
.side-nav * {
    box-sizing: border-box;
}

@media (max-width: 480px) {
    .side-nav {
        width: min(
            var(--shell-drawer-width, 380px),
            calc(100vw - 24px)
        );
        max-width: calc(100vw - 24px);
        padding: 20px 16px;
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .side-nav-header {
        min-width: 0;
        padding-bottom: 16px;
        margin-bottom: 18px;
        gap: 12px;
    }

    .side-nav-header .brand {
        min-width: 0;
        max-width: 100%;
        font-size: 16px;
        overflow-wrap: anywhere;
    }

    .side-nav-close {
        flex: 0 0 32px;
        width: 32px;
        height: 32px;
    }

    .side-nav-menu {
        min-width: 0;
    }

    .side-nav-menu .nav-group-title {
        font-size: 10px;
        line-height: 1.3;
        margin-bottom: 5px;
    }

    .side-nav-menu a {
        display: flex;
        align-items: center;
        width: 100%;
        min-width: 0;
        min-height: 36px;
        padding: 7px 10px 7px 12px;
        font-size: 14px;
        line-height: 1.35;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .side-nav-footer {
        min-width: 0;
        margin-top: 20px;
        padding-top: 16px;
    }

    .side-nav-footer .theme-label {
        font-size: 13px;
        line-height: 1.4;
    }

    .side-nav-footer .network-status {
        min-width: 0;
        font-size: 12px;
        line-height: 1.4;
        overflow-wrap: anywhere;
    }
}

@media (max-width: 360px) {
    .side-nav {
        width: calc(100vw - 16px);
        max-width: calc(100vw - 16px);
        padding: 16px 12px;
    }

    .side-nav-header {
        padding-bottom: 12px;
        margin-bottom: 16px;
        gap: 10px;
    }

    .side-nav-header .brand {
        font-size: 15px;
    }

    .side-nav-close {
        flex-basis: 30px;
        width: 30px;
        height: 30px;
    }

    .side-nav-menu .nav-group-title {
        font-size: 10px;
    }

    .side-nav-menu a {
        min-height: 34px;
        padding: 6px 8px 6px 10px;
        font-size: 14px;
    }

    .side-nav-footer {
        margin-top: 16px;
        padding-top: 14px;
    }

    .side-nav-footer .theme-label {
        font-size: 13px;
    }

    .side-nav-footer .network-status {
        font-size: 12px;
    }
}

@media (max-width: 320px) {
    .side-nav {
        width: calc(100vw - 12px);
        max-width: calc(100vw - 12px);
        padding-left: 10px;
        padding-right: 10px;
    }

    .side-nav-menu a {
        padding-left: 8px;
        padding-right: 8px;
    }
}

html {
    overflow-x: clip;
}

@supports not (overflow-x: clip) {
    html {
        overflow-x: hidden;
    }
}

@media (prefers-reduced-motion: reduce) {
    .side-nav,
    .side-nav * {
        scroll-behavior: auto;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* ============================================================
   HEADER ACTIONS HARDENING
   Mobile burger must always remain inside viewport.
   ============================================================ */

.header-inner,
.header-actions,
.header-actions > * {
    box-sizing: border-box;
}

@media (max-width: 768px) {

    .header-inner {
        min-width: 0;
    }

    .header-inner > .brand {
        min-width: 0;
        max-width: 100%;
    }

    .header-actions {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        flex: 0 0 auto;
        width: auto;
        min-width: 0;
        max-width: 100%;
        margin-left: auto;
        margin-right: 0;
        padding-left: 8px;
        padding-right: 0;
        gap: 8px;
        overflow: visible;
    }

    .theme-toggle,
    .burger {
        flex: 0 0 auto;
        margin: 0;
    }

    .burger {
        margin-right: 0;
    }
}

@media (max-width: 480px) {

    .header-inner {
        padding-left: 16px;
        padding-right: 16px;
    }

    .header-actions {
        gap: 4px;
        padding-left: 6px;
    }

    .theme-toggle,
    .burger {
        width: 34px;
        height: 34px;
        min-width: 34px;
        min-height: 34px;
        flex: 0 0 34px;
    }

    .burger span {
        width: 20px;
        height: 2px;
    }
}

@media (max-width: 360px) {

    .header-inner {
        padding-left: 12px;
        padding-right: 12px;
    }

    .header-actions {
        gap: 2px;
        padding-left: 4px;
    }

    .theme-toggle,
    .burger {
        width: 32px;
        height: 32px;
        min-width: 32px;
        min-height: 32px;
        flex-basis: 32px;
    }

    .burger span {
        width: 18px;
    }
}