/* ========================================
   SECTION 12: 로그인/회원가입 모달
   ✦ 다크/인디고 디자인 매칭
======================================== */

/* ───── Overlay ───── */
.auth-modal-overlay {
    position: fixed; inset: 0;
    background: rgba(9, 9, 11, .6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: opacity .3s ease, visibility .3s ease;
}
.auth-modal-overlay.active {
    opacity: 1; visibility: visible;
}

/* ───── Modal ───── */
.auth-modal {
    background: var(--surface);
    border-radius: 20px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, .15), 0 0 0 1px rgba(0, 0, 0, .04);
    width: 100%; max-width: 420px;
    padding: 36px 32px 32px;
    position: relative;
    transform: translateY(16px) scale(.97);
    transition: transform .3s cubic-bezier(.16, 1, .3, 1);
}
.auth-modal-overlay.active .auth-modal {
    transform: translateY(0) scale(1);
}

/* ───── Close Button ───── */
.auth-modal-close {
    position: absolute; top: 16px; right: 16px;
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 10px; font-size: 16px;
    color: var(--text-3);
    transition: var(--transition);
}
.auth-modal-close:hover {
    background: var(--surface-3); color: var(--text);
}

/* ───── Tabs ───── */
.auth-tabs {
    display: flex; gap: 4px;
    background: var(--surface-3);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 28px;
}
.auth-tab {
    flex: 1;
    padding: 10px 0;
    font-size: 16px; font-weight: 600;
    color: var(--text-3);
    border-radius: 9px;
    transition: var(--transition);
}
.auth-tab:hover { color: var(--text-2); }
.auth-tab.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: 0 1px 4px rgba(0, 0, 0, .06);
}

/* ───── Google Button ───── */
.auth-google-btn {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    width: 100%;
    padding: 12px;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 16px; font-weight: 600;
    color: var(--text-2);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}
.auth-google-btn:hover {
    border-color: var(--text-3);
    background: var(--surface-2);
    color: var(--text);
}
.auth-google-icon { flex-shrink: 0; }

/* ───── Naver Button ───── */
.auth-naver-btn {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    width: 100%;
    padding: 12px;
    background: #03C75A;
    border: 1.5px solid #03C75A;
    border-radius: 10px;
    font-size: 16px; font-weight: 600;
    color: #fff;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    margin-top: 8px;
}
.auth-naver-btn:hover {
    background: #02b351;
    border-color: #02b351;
    color: #fff;
}
.auth-naver-icon { flex-shrink: 0; }

/* ───── Divider ───── */
.auth-divider {
    display: flex; align-items: center; gap: 12px;
    margin: 20px 0;
    color: var(--text-3);
    font-size: 16px; font-weight: 500;
}
.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ───── Form ───── */
.auth-form-group { margin-bottom: 18px; }
.auth-label {
    display: block;
    font-size: 17px; font-weight: 600;
    color: var(--text-2);
    margin-bottom: 6px;
}
.auth-input-wrap {
    display: flex; align-items: center; gap: 10px;
    background: var(--surface-2);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    padding: 0 14px;
    transition: var(--transition);
}
.auth-input-wrap:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(58, 123, 213, .1);
}
.auth-input-wrap i {
    font-size: 16px; color: var(--text-3);
    flex-shrink: 0;
}
.auth-input {
    flex: 1;
    border: none; background: none; outline: none;
    padding: 12px 0;
    font-size: 16px; font-family: var(--font);
    color: var(--text);
}
.auth-input::placeholder { color: var(--text-3); }

/* ───── Password Toggle ───── */
.auth-pw-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px;
    color: var(--text-3); font-size: 16px;
    border-radius: 6px;
    transition: var(--transition);
    flex-shrink: 0;
}
.auth-pw-toggle:hover { color: var(--text-2); background: var(--surface-3); }

/* ───── Error ───── */
.auth-error {
    font-size: 17px; color: var(--danger);
    font-weight: 500;
    min-height: 0;
    overflow: hidden;
    transition: all .2s ease;
}
.auth-error:not(:empty) {
    min-height: 20px;
    margin-bottom: 12px;
    padding: 8px 12px;
    background: var(--danger-bg);
    border-radius: 8px;
}

/* ───── Submit Button ───── */
.auth-submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--text-inverse);
    font-size: 17px; font-weight: 700;
    border-radius: 12px;
    box-shadow: var(--shadow-primary);
    transition: var(--transition);
    margin-top: 6px;
}
.auth-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 32px rgba(58, 123, 213, .3);
    filter: brightness(1.05);
}
.auth-submit-btn:active {
    transform: translateY(0);
}
.auth-submit-btn:disabled {
    opacity: .6; cursor: not-allowed;
    transform: none; filter: none;
}

/* ───── Header User State ───── */
.util-user-info {
    display: flex; align-items: center; gap: 8px;
}
.util-user-name {
    color: var(--point-light);
    font-weight: 600;
    font-size: 16px;
}
.util-user-name i {
    margin-right: 4px;
    font-size: 17px;
}
.util-logout-btn {
    color: rgba(255, 255, 255, .45);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    background: none; border: none;
    font-family: var(--font);
    transition: var(--transition);
}
.util-logout-btn:hover { color: #fff; }

/* ───── Mobile ───── */
@media (max-width: 768px) {
    .auth-modal {
        max-width: calc(100% - 32px);
        padding: 28px 20px 24px;
        border-radius: 16px;
    }
}