/* ==========================================================================
   2. STUDIO SHELL, HEADER, NAVIGATION, AUTH GATE & FULL-SCREEN DIALOG FRAME
   ========================================================================== */
/* Top Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 6px;
    flex-wrap: wrap;
    gap: 12px;
}

.header-title-group h1 {
    font-family: 'Outfit', 'Outfit Fallback', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, #f8fafc 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.studio-header-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    border-radius: 9px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
    transition: var(--transition);
}

.studio-title-text {
    background: linear-gradient(135deg, #f8fafc 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-title-group p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.header-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

/* Top Navigation Tabs */
.studio-nav-tabs {
    display: flex;
    gap: 10px;
    background: var(--surface-1);
    border: 1px solid var(--border);
    padding: 6px;
    border-radius: var(--radius-md);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 10px 28px -10px rgba(0, 0, 0, 0.45);
}

.studio-tab-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-muted);
    font-family: 'Outfit', 'Outfit Fallback', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.studio-tab-btn:hover {
    color: var(--text-main);
    background: rgba(34, 47, 70, 0.45);
}

.studio-tab-btn.active {
    background: var(--surface-2);
    color: #f8fafc;
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.28);
}

.tab-count-pill,
#navTotalLinksBadge {
    font-family: 'Inter', 'Inter Fallback', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 11px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    background: rgba(96, 165, 250, 0.14);
    color: var(--accent);
    border: 1px solid rgba(96, 165, 250, 0.28);
}
/* Toast Alert */
.toast {
    position: fixed;
    bottom: 24px;
    left: 24px;
    background: var(--surface-modal);
    border: 1px solid var(--border-hover);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
    display: none;
    align-items: center;
    gap: 8px;
    z-index: 2000;
    animation: toastIn 0.25s ease;
}

@keyframes toastIn {
    from { transform: translateY(16px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* User Session Bar */
.user-badge {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    background: var(--surface-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 5px 12px;
    font-size: 13px;
}
.user-name {
    font-weight: 600;
    color: var(--text-main);
}
.user-brands-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 9999px;
    background: rgba(96, 165, 250, 0.14);
    color: var(--accent);
    border: 1px solid rgba(96, 165, 250, 0.28);
}
.header-util-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.header-util-btn:hover {
    background: var(--surface-3);
    border-color: var(--border-hover);
    color: #ffffff;
}
.header-util-btn-shortcut {
    color: var(--text-main);
    border-color: var(--border);
    background: var(--surface-2);
}
.header-util-btn-shortcut:hover {
    background: var(--surface-3);
    border-color: var(--border-hover);
    color: #ffffff;
}
.logout-btn {
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.logout-btn:hover {
    background: rgba(225, 29, 72, 0.12);
    border-color: rgba(225, 29, 72, 0.35);
    color: var(--danger-text);
}

/* Hide Studio Workspace When Unauthenticated or Forced Password Reset Active */
body:not(.authenticated) .studio-container,
body:not(.authenticated) #pipWidget,
body:not(.authenticated) #showPreviewPill,
body.force-password-reset .studio-container,
body.force-password-reset #pipWidget,
body.force-password-reset #showPreviewPill {
    display: none !important;
}

/* Auth Gate Overlay */
.auth-gate-backdrop {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 15% 15%, var(--accent-glow) 0%, transparent 45%),
        radial-gradient(circle at 85% 85%, rgba(30, 58, 138, 0.16) 0%, transparent 45%),
        var(--bg-deep);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--surface-modal);
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.72);
    border-radius: var(--radius-lg);
    padding: 34px 28px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.auth-card-header {
    text-align: center;
}
.auth-card-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 24px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.3px;
}
.auth-card-header p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
}
.auth-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.auth-input-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.auth-input {
    width: 100%;
    padding: 12px 14px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: #ffffff;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}
.auth-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.auth-submit-btn {
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--accent-cta-start) 0%, var(--accent-cta-end) 100%);
    border: none;
    border-radius: var(--radius-sm);
    color: #f8fafc;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 4px 14px rgba(37, 99, 235, 0.28);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.auth-submit-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.08);
}
.auth-passkey-section {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: -2px;
}
.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-dim);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
.auth-divider::before,
.auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}
.auth-passkey-btn {
    width: 100%;
    padding: 12px;
    background: var(--surface-2);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-sm);
    color: var(--accent);
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.auth-passkey-btn:hover:not(:disabled) {
    background: rgba(96, 165, 250, 0.14);
    border-color: var(--accent);
    color: #ffffff;
    transform: translateY(-1px);
}
.auth-passkey-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.auth-error-box {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: rgba(225, 29, 72, 0.15);
    border: 1px solid rgba(225, 29, 72, 0.3);
    color: var(--danger-text);
    font-size: 12px;
    display: none;
    text-align: center;
}
/* Native HTML <dialog> Modal for Editing Links (per modern-web-guidance) */
dialog.studio-dialog {
    margin: auto;
    background: var(--surface-modal);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 92%;
    max-width: 500px;
    padding: 28px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.72);
}

dialog.studio-dialog::backdrop {
    background-color: rgba(7, 10, 18, 0.8);
    backdrop-filter: blur(8px);
}
/* Full-Screen Studio Dialog Views (#linkDetailDialog, #xPostDialog, #editLinkDialog) */
body.studio-overlay-open {
    overflow: hidden !important;
}

dialog.studio-dialog.fullscreen-studio-dialog,
dialog#linkDetailDialog,
dialog#xPostDialog,
dialog#editLinkDialog {
    position: fixed;
    inset: 0;
    width: 100vw;
    max-width: 100vw;
    height: 100dvh;
    max-height: 100dvh;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 0;
    background:
        radial-gradient(circle at 12% 0%, var(--accent-glow) 0%, transparent 38%),
        radial-gradient(circle at 88% 100%, rgba(30, 58, 138, 0.14) 0%, transparent 42%),
        var(--bg-deep);
    color: var(--text-main);
    box-shadow: none;
    overflow-y: auto;
    overscroll-behavior: contain;
}

dialog.studio-dialog.fullscreen-studio-dialog::backdrop,
dialog#linkDetailDialog::backdrop,
dialog#xPostDialog::backdrop,
dialog#editLinkDialog::backdrop {
    background: var(--bg-deep);
    backdrop-filter: none;
}

.fullscreen-dialog-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    width: 100%;
    background: rgba(8, 12, 20, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.fullscreen-topbar-inner {
    max-width: 1040px;
    width: 100%;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.fullscreen-topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    min-width: 0;
}

.fullscreen-topbar-title {
    font-family: 'Outfit', sans-serif;
    font-size: 18px;
    font-weight: 800;
    color: #ffffff;
    margin: 0;
}

.fullscreen-back-btn,
.fullscreen-close-btn,
.link-detail-close-btn {
    min-height: 38px;
    height: 38px;
    padding: 6px 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

.fullscreen-dialog-body {
    max-width: 1040px;
    width: 100%;
    margin: 0 auto;
    padding: 20px 24px 36px;
}

.fullscreen-dialog-narrow,
.x-post-workspace {
    max-width: 680px;
}

@media (max-width: 768px) {
.page-header {
        gap: 6px;
        padding-bottom: 0;
    }

    .header-title-group h1 {
        font-size: 18px;
        gap: 8px;
    }

    .studio-header-icon {
        width: 24px;
        height: 24px;
        border-radius: 6px;
    }

    #studioDomainNotice {
        display: none !important;
    }

    .header-links {
        width: 100%;
    }

    .user-badge {
        width: 100%;
        justify-content: space-between;
        padding: 4px 8px;
        gap: 4px;
        font-size: 11px;
    }

    .user-brands-badge {
        display: none;
    }

    .header-util-btn,
    .logout-btn {
        min-height: 28px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 4px 8px;
        font-size: 11px;
    }

    .studio-nav-tabs {
        gap: 6px;
        padding: 4px;
    }

    .studio-tab-btn {
        flex: 1 1 auto;
        min-width: 0;
        min-height: 36px;
        padding: 7px 10px;
        font-size: 12.5px;
        gap: 6px;
        white-space: nowrap;
    }

    .tab-count-pill,
    #navTotalLinksBadge {
        font-size: 10.5px;
        padding: 1px 6px;
    }
    dialog.studio-dialog.fullscreen-studio-dialog,
    dialog#linkDetailDialog,
    dialog#xPostDialog,
    dialog#editLinkDialog {
        width: 100vw;
        max-width: 100vw;
        height: 100dvh;
        max-height: 100dvh;
        padding: 0;
    }
    .fullscreen-topbar-inner {
        padding: 8px 12px;
        gap: 6px;
        flex-wrap: nowrap;
    }

    .fullscreen-topbar-left {
        gap: 6px;
        flex-wrap: nowrap;
        overflow: hidden;
    }

    .fullscreen-back-btn,
    .fullscreen-close-btn,
    .link-detail-close-btn {
        padding: 6px 9px;
        font-size: 11.5px;
        gap: 4px;
    }

    .fullscreen-topbar-title {
        font-size: 15px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .fullscreen-dialog-body {
        padding: 10px 12px 24px;
    }
}