/* ============================================
   VoiceBoard — Sidebar & Navbar v3
   iPadOS-style navigation with iOS polish
   ============================================ */

/* ── Navbar — iOS Navigation Bar ── */
.navbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: 60px;
    background: var(--glass-bg-thick);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--color-separator);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 100;
    transition: left var(--transition-base);
}

.navbar.sidebar-collapsed {
    left: var(--sidebar-collapsed-width);
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 4px 12px 4px 4px;
    border-radius: var(--radius-full);
    background: var(--color-fill);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.navbar-user:hover {
    background: var(--color-fill-secondary);
}

.navbar-avatar {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

.navbar-username {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

/* ── Theme Toggle — iOS Style ── */
.theme-toggle {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--color-fill);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-fill-secondary);
    color: var(--color-text-primary);
}

/* ── Sidebar — iPadOS Style ── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    height: 100dvh;
    background: transparent;
    border-right: 1px solid var(--color-separator);
    display: flex;
    flex-direction: column;
    z-index: 200;
    transition: width var(--transition-base), transform var(--transition-base);
    overflow: hidden;
    transform: translateZ(0); /* Isolate GPU layer to prevent WebKit backdrop-filter ghosting */
    -webkit-transform: translateZ(0);
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--glass-bg-thick);
    z-index: -1;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-md);
    height: 60px;
    border-bottom: 1px solid var(--color-separator);
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.sidebar-logo-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.sidebar-logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    white-space: nowrap;
    transition: opacity var(--transition-fast), width var(--transition-fast);
}

.sidebar.collapsed .sidebar-logo-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar-toggle {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: var(--color-fill);
    color: var(--color-text-primary);
}

.sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

/* ── Sidebar Navigation — iOS List Style ── */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-sm);
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    z-index: 1;
    -webkit-transform: translateZ(0); /* Fix Chrome repaint bug */
    transform: translateZ(0);
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
}

.sidebar-nav::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
}

.sidebar-section {
    margin-bottom: var(--spacing-md);
}

.sidebar-section-title {
    font-size: var(--font-size-2xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: 2px;
    white-space: nowrap;
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-section-title {
    opacity: 0;
    height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px var(--spacing-md);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    white-space: nowrap;
    margin-bottom: 1px;
    position: relative;
    min-height: 36px;
}

.sidebar-link:hover {
    background: var(--color-fill);
    color: var(--color-text-primary);
}

.sidebar-link.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

/* Active indicator dot */
.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: var(--color-primary);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.sidebar-link-icon {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    flex-shrink: 0;
}

.sidebar-link-text {
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-link-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-link {
    justify-content: center;
    padding: 10px;
}

/* ── Sidebar Footer ── */
.sidebar-footer {
    padding: var(--spacing-sm) var(--spacing-md);
    border-top: 1px solid var(--color-separator);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.sidebar-footer .sidebar-link {
    margin-bottom: 0;
}

/* ── Login Page — Apple Sign-In Style ── */
.login-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background);
    position: relative;
    overflow: hidden;
}

/* Ambient glow */
.login-page::before {
    content: '';
    position: absolute;
    top: -40%;
    left: -20%;
    width: 60%;
    height: 80%;
    background: radial-gradient(ellipse, color-mix(in srgb, var(--color-primary) 8%, transparent) 0%, transparent 70%);
    animation: loginFloat 12s ease-in-out infinite alternate;
}

.login-page::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -15%;
    width: 50%;
    height: 70%;
    background: radial-gradient(ellipse, color-mix(in srgb, var(--color-accent) 6%, transparent) 0%, transparent 70%);
    animation: loginFloat 15s ease-in-out infinite alternate-reverse;
}

@keyframes loginFloat {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(3%, -2%) scale(1.05); }
}

.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl) var(--spacing-xl);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
    animation: slideUp 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

@media (max-width: 480px) {
    .login-card {
        margin: 16px;
        padding: var(--spacing-xl) var(--spacing-lg);
        border-radius: var(--radius-xl);
    }
}

.login-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 26px;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 16px color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.login-logo h1 {
    color: var(--color-text-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.3px;
}

.login-logo p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.login-card .form-input {
    background: var(--color-fill-tertiary);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.login-card .form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
    background: var(--color-surface);
}

.login-card .form-input::placeholder {
    color: var(--color-text-tertiary);
}

.login-card .form-label {
    color: var(--color-text-secondary);
}

.login-card .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: var(--font-size-base);
    border-radius: var(--radius-md);
}

.login-error {
    background: var(--color-danger-light);
    color: var(--color-danger);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ── Responsive Sidebar ── */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: none;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: var(--shadow-float);
    }

    .navbar {
        left: 0;
    }

    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 150;
        animation: fadeIn 0.2s ease;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}