.auth-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.auth-modal-backdrop.auth-open {
    opacity: 1;
    visibility: visible;
}

.auth-modal {
    background: var(--c-surface2);
    border: 1px solid var(--c-border2);
    border-radius: 20px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.55);
    transform: translateY(16px) scale(0.97);
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    overflow: hidden;
    position: relative;
}

.auth-modal-backdrop.auth-open .auth-modal {
    transform: translateY(0) scale(1);
}

.auth-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    color: var(--c-text3);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    transition: all 0.18s ease;
    z-index: 2;
}

.auth-modal-close:hover {
    background: var(--c-bg3);
    color: var(--c-text);
    border-color: var(--c-border2);
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--c-border);
}

.auth-tab {
    flex: 1;
    padding: 16px;
    text-align: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--c-text3);
    cursor: pointer;
    background: none;
    border: none;
    font-family: var(--font-body);
    transition: all 0.18s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.auth-tab:hover { color: var(--c-text2); }

.auth-tab.active {
    color: var(--c-accent);
    border-bottom-color: var(--c-accent);
}

.auth-panel {
    display: none;
    padding: 24px 28px 28px;
}

.auth-panel.active { display: block; }

.auth-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.auth-logo svg {
    width: 28px;
    height: 28px;
    color: var(--c-accent);
    filter: drop-shadow(0 0 10px rgba(var(--c-accent-r),var(--c-accent-g),var(--c-accent-b),0.4));
}

.auth-logo-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 800;
    color: var(--c-text);
    letter-spacing: -0.02em;
}

.auth-heading {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--c-text);
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.auth-sub {
    font-size: 0.8125rem;
    color: var(--c-text2);
    margin-bottom: 22px;
    line-height: 1.55;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.auth-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--c-text2);
}

.auth-input {
    width: 100%;
    height: 42px;
    background: var(--c-surface);
    border: 1px solid var(--c-border2);
    border-radius: 10px;
    padding: 0 14px;
    font-size: 0.875rem;
    color: var(--c-text);
    outline: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
    font-family: var(--font-body);
    -webkit-appearance: none;
}

.auth-input::placeholder { color: var(--c-text3); }

.auth-input:focus {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(var(--c-accent-r), var(--c-accent-g), var(--c-accent-b), 0.15);
}

.auth-input.has-error { border-color: var(--c-red); }

.auth-error-text {
    font-size: 0.72rem;
    color: var(--c-red);
    font-weight: 500;
    display: none;
}

.auth-error-text.visible { display: block; }

.auth-agreement {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    font-size: 0.78rem;
    color: var(--c-text2);
    line-height: 1.55;
    padding: 4px 0;
}

.auth-agreement input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-top: 1px;
    accent-color: var(--c-accent);
    cursor: pointer;
    flex-shrink: 0;
}

.auth-agreement a {
    color: var(--c-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.auth-submit {
    height: 44px;
    background: var(--c-accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 0.9375rem;
    font-weight: 700;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.18s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 4px;
    letter-spacing: -0.01em;
}

.auth-submit:hover {
    background: var(--c-lavender);
    box-shadow: 0 4px 20px rgba(var(--c-accent-r), var(--c-accent-g), var(--c-accent-b), 0.45);
    transform: translateY(-1px);
}

.auth-submit:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.auth-submit-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: auth-spin 0.7s linear infinite;
    display: none;
}

.auth-submit.loading .auth-submit-spinner { display: block; }
.auth-submit.loading .auth-submit-label { display: none; }

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

.auth-server-error {
    background: rgba(255, 85, 114, 0.1);
    border: 1px solid rgba(255, 85, 114, 0.25);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.8125rem;
    color: var(--c-red);
    display: none;
}

.auth-server-error.visible { display: block; }

.auth-server-success {
    background: rgba(34, 211, 160, 0.1);
    border: 1px solid rgba(34, 211, 160, 0.25);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.8125rem;
    color: var(--c-green);
    display: none;
}

.auth-server-success.visible { display: block; }

.auth-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--c-text3);
    font-size: 0.72rem;
    margin: 2px 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--c-border);
}

.auth-switch {
    text-align: center;
    font-size: 0.8rem;
    color: var(--c-text3);
    margin-top: 8px;
}

.auth-switch button {
    color: var(--c-accent);
    font-weight: 600;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: inherit;
    padding: 0;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.auth-switch button:hover { opacity: 0.8; }

.user-menu-wrapper {
    position: relative;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 10px;
    border: 1px solid transparent;
    transition: all 0.18s ease;
    background: none;
    font-family: var(--font-body);
    color: var(--c-text);
}

.user-menu-trigger:hover { background: var(--c-surface); border-color: var(--c-border); }

.user-avatar-sm {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-accent), var(--c-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}

.user-avatar-sm img { width: 100%; height: 100%; object-fit: cover; }

.user-avatar-sm svg { width: 14px; height: 14px; color: #fff; }

.user-menu-name {
    font-size: 0.8125rem;
    font-weight: 600;
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-menu-caret { color: var(--c-text3); transition: transform 0.18s ease; }
.user-menu-caret svg { width: 12px; height: 12px; }
.user-menu-trigger[aria-expanded="true"] .user-menu-caret { transform: rotate(180deg); }

.user-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--c-surface2);
    border: 1px solid var(--c-border2);
    border-radius: 12px;
    min-width: 180px;
    box-shadow: 0 16px 40px rgba(0,0,0,0.4);
    z-index: 200;
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.18s ease;
}

.user-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-header {
    padding: 10px 12px 8px;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: 4px;
}

.user-dropdown-name { font-size: 0.875rem; font-weight: 700; color: var(--c-text); }
.user-dropdown-email { font-size: 0.72rem; color: var(--c-text3); margin-top: 1px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.user-dropdown a,
.user-dropdown button {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.8125rem;
    color: var(--c-text2);
    transition: all 0.15s ease;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    text-decoration: none;
}

.user-dropdown a svg,
.user-dropdown button svg { width: 14px; height: 14px; flex-shrink: 0; }

.user-dropdown a:hover,
.user-dropdown button:hover { background: var(--c-surface); color: var(--c-text); }

.user-dropdown .logout-btn { color: var(--c-red); }
.user-dropdown .logout-btn:hover { background: rgba(255, 85, 114, 0.08); color: var(--c-red); }

.user-dropdown-divider { height: 1px; background: var(--c-border); margin: 4px 0; }

.topnav-auth-btn {
    height: 34px;
    padding: 0 16px;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.18s ease;
    border: 1px solid var(--c-border2);
    background: var(--c-surface);
    color: var(--c-text2);
}

.topnav-auth-btn:hover { background: var(--c-surface2); color: var(--c-text); }

.topnav-auth-btn.primary {
    background: var(--c-accent);
    border-color: var(--c-accent);
    color: #fff;
}

.topnav-auth-btn.primary:hover {
    background: var(--c-lavender);
    border-color: var(--c-lavender);
    box-shadow: 0 4px 16px rgba(var(--c-accent-r),var(--c-accent-g),var(--c-accent-b),0.35);
}