/* Sidebar Navigation */
.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--surface-container-lowest);
    border-right: 2px solid var(--on-surface);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-brand {
    padding: var(--space-4) var(--space-4);
    border-bottom: 1px solid var(--outline-variant);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--on-surface);
}

.sidebar-brand:hover {
    text-decoration: none;
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    background: var(--on-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-brand-icon svg {
    width: 18px;
    height: 18px;
    color: var(--surface-container-lowest);
}

.sidebar-brand-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: var(--body-md);
    letter-spacing: 0.06rem;
    text-transform: uppercase;
    line-height: 1.1;
}

.sidebar-brand-sub {
    font-family: var(--font-technical);
    font-size: 0.6rem;
    color: var(--outline);
    text-transform: uppercase;
    letter-spacing: 0.08rem;
}

.sidebar-action {
    padding: var(--space-3) var(--space-4);
}

.sidebar-action .btn-primary {
    width: 100%;
    font-size: var(--label-sm);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-2) 0;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--body-md);
    font-weight: 500;
    color: var(--on-surface);
    text-decoration: none;
    transition: background 0.1s ease;
}

.sidebar-link:hover {
    background: var(--surface-container-low);
    text-decoration: none;
}

.sidebar-link-active {
    background: var(--primary);
    color: var(--on-primary);
}

.sidebar-link-active:hover {
    background: var(--primary-dim);
}

.sidebar-link svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.sidebar-footer {
    border-top: 1px solid var(--outline-variant);
    padding: var(--space-2) 0;
}

.sidebar-footer .sidebar-link {
    font-size: var(--label-md);
    color: var(--outline);
}

/* Top header bar */
.topbar {
    height: 48px;
    border-bottom: 2px solid var(--on-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-6);
    background: var(--surface-container-lowest);
}

.topbar-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.topbar-title h1 {
    font-family: var(--font-display);
    font-size: var(--body-md);
    font-weight: 800;
    letter-spacing: 0.06rem;
    text-transform: uppercase;
}

.topbar-badges {
    display: flex;
    gap: var(--space-1);
}

.topbar-badge {
    font-family: var(--font-technical);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.05rem;
    text-transform: uppercase;
    padding: 0.125rem 0.375rem;
    border: 1px solid currentColor;
}

.topbar-badge-live {
    color: var(--primary);
    background: var(--primary-container);
}

.topbar-badge-prod {
    color: var(--on-surface);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.topbar-search {
    display: flex;
    align-items: center;
    border: 1px solid var(--outline-variant);
    padding: 0.25rem 0.75rem;
    gap: var(--space-2);
    background: var(--surface);
}

.topbar-search input {
    border: none;
    background: transparent;
    font-family: var(--font-technical);
    font-size: var(--label-md);
    color: var(--on-surface);
    outline: none;
    width: 140px;
}

.topbar-search input::placeholder {
    color: var(--outline);
}

.topbar-icons {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.topbar-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--on-surface);
}

.topbar-notif {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface);
    text-decoration: none;
}

.topbar-notif-badge {
    position: absolute;
    top: -4px;
    right: -6px;
    background: var(--error);
    color: #fff;
    font-size: 0.625rem;
    font-weight: 700;
    font-family: var(--font-technical);
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.topbar-user {
    font-family: var(--font-technical);
    font-size: var(--label-md);
    color: var(--on-surface);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* Main content area */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding: var(--space-8) var(--space-6);
    max-width: 72rem;
}

/* Hero section */
.hero-section {
    padding: var(--space-16) 0 var(--space-10);
    max-width: 40rem;
}

.hero-section .display-lg {
    margin-bottom: var(--space-4);
}

.hero-section .body-lg {
    margin-bottom: var(--space-8);
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
}

/* Auth pages */
.auth-container {
    max-width: 24rem;
    margin: var(--space-16) auto;
}

.auth-container .headline-lg {
    margin-bottom: var(--space-2);
}

.auth-container .body-lg {
    margin-bottom: var(--space-8);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.auth-form .btn-full {
    margin-top: var(--space-3);
}

.auth-switch {
    margin-top: var(--space-6);
    text-align: center;
    color: var(--outline);
}

/* Page headers */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
}

/* Project grid */
.project-section {
    margin-top: var(--space-10);
}

.section-label {
    margin-bottom: var(--space-5);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
    gap: var(--space-5);
}

.project-card {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: background 0.1s ease;
}

.project-card:hover {
    background: var(--surface-container-low);
    text-decoration: none;
}

.project-card .headline-sm {
    margin-bottom: var(--space-2);
}

.project-desc {
    margin-bottom: var(--space-3);
}

.project-meta {
    display: flex;
    gap: var(--space-2);
}

/* Project header */
.project-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.project-header-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.project-header-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

.project-description {
    margin-bottom: var(--space-8);
}

/* Members list */
.members-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.member-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--outline-variant);
}

.member-info {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    flex: 1;
}

/* Form pages */
.form-page {
    max-width: 36rem;
}

.form-page .headline-lg {
    margin-bottom: var(--space-2);
}

.form-page .body-lg,
.form-page .body-md {
    margin-bottom: var(--space-8);
}

.project-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.form-row {
    display: flex;
    gap: var(--space-4);
}

.form-group-grow {
    flex: 1;
}

/* Radio groups */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.radio-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.radio-option input[type="radio"] {
    accent-color: var(--primary);
}

/* Select fields */
select.input-field {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23767777' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* Settings sections */
.settings-section {
    margin-top: var(--space-8);
}

.settings-section .title-lg {
    margin-bottom: var(--space-5);
}

.settings-danger {
    border-top: 2px solid var(--tertiary);
    padding-top: var(--space-6);
}

.settings-danger .title-lg {
    color: var(--tertiary);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--space-16) 0;
}

.empty-state .body-lg {
    margin-bottom: var(--space-5);
}

.inline-form {
    display: inline;
}

/* Footer */
.site-footer {
    border-top: 2px solid var(--on-surface);
    background: var(--surface-container-lowest);
}

.footer-inner {
    padding: var(--space-3) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-technical);
    font-size: var(--label-md);
    color: var(--outline);
}

.footer-indicators {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.footer-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
}

.footer-dot-red {
    background: var(--tertiary);
}

/* No-sidebar fallback for auth pages */
.auth-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.auth-shell .main-content {
    flex: 1;
    max-width: 72rem;
    margin: 0 auto;
}

/* Mobile menu toggle — hidden by default */
.topbar-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--on-surface);
    padding: var(--space-1);
}

/* ==============================
   Responsive — Tablet (≤1024px)
   ============================== */

@media (max-width: 1024px) {
    .topbar-menu-toggle {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }

    .sidebar.sidebar-open {
        transform: translateX(0);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 99;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .app-main {
        margin-left: 0;
    }

    .main-content {
        padding: var(--space-6) var(--space-4);
    }

    .topbar {
        padding: 0 var(--space-4);
    }

    .topbar-search input {
        width: 100px;
    }

    .project-grid {
        grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
    }

    .form-page {
        max-width: 100%;
    }

    .auth-container {
        margin: var(--space-8) auto;
        padding: 0 var(--space-4);
    }

    .footer-inner {
        padding: var(--space-3) var(--space-4);
    }
}

/* ==============================
   Responsive — Mobile (≤768px)
   ============================== */

@media (max-width: 768px) {
    .main-content {
        padding: var(--space-4) var(--space-3);
    }

    .topbar {
        padding: 0 var(--space-3);
    }

    .topbar-search {
        display: none;
    }

    .topbar-icons {
        display: none;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .project-header {
        flex-direction: column;
    }

    .project-header-actions {
        flex-shrink: initial;
    }

    .form-row {
        flex-direction: column;
        gap: var(--space-4);
    }

    .member-row {
        flex-wrap: wrap;
    }

    .hero-section {
        padding: var(--space-8) 0 var(--space-6);
    }

    .hero-actions {
        flex-direction: column;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-2);
        text-align: center;
    }
}

/* ==============================
   Responsive — Small Mobile (≤375px)
   ============================== */

@media (max-width: 375px) {
    .main-content {
        padding: var(--space-3) var(--space-2);
    }

    .topbar-title h1 {
        font-size: var(--label-md);
    }

    .topbar-badges {
        display: none;
    }
}